SMC The ERNI SMC Connector System 1.27mm (.050) Board-toBoard & CabletoBoard Connectors A New Level of Connector Performance from ERNI In response to the growing need for high density inter- connects, ERNI offers the SMC Connector System which combines many of the high quality features of 2.54mm centerline connectors, like the ERNI DIN 41612 connectors, into a connector which uses half the space. The result is a miniature connector with a 1.27 mm cent- erline, which offers distinct advantages in applications where space is at a premium and packaging density is an absolute. The SMC connectors feature both standard mating (straight socket to 90 piug) and inverse mating (straight plug to 90 socket) for printed circuit board (PCB) interconnecting. This provides for diverse PCB toPCB applications such as right angle connector (on the daughter card) to straight connector (on the *mother board) mating configurations or for parallel or stacking mating configurations. The SMC connectors also feature a cable-toPC board version which pro- vides an efficient means of connecting ribbon cables to PC boards in small spaces. Additionally, surface mount (SMT) and robot compatible versions allow PC boards to be assembled using the most advanced processing technologies. Space Saving SMC Applications & Advantages The SMC Connector System from ERNI is already in use in a wide range of applications where efficient space uti- lization, packaging density and high system perfor- mance are crucial. Here are some ideal applications and unique application features of the SMC: e Notebook, laptop and portable computers, compact periph- erals, portable test and measurement equipment and other small electronic equipment. Stacking applications for multiple PC boards e.g. two PC boards fit into 19 subracks and modular assemblies accord- ing to DIN 41494. e Smail systems in which PC boards are processed in thru hole, SMT, or hybrid (thru-hole & SMT) technologies. e Insulation displacement (IDC) socket connectors for .635mm (.025"} ribbon cable. Ptug connectors with ejector latches for a positive lock when mating to the IDC socket connectors. New mounting techniques such as pre-installed rivets or in- tegral, molded-in mounting pegs to assure alignment and attachment to the PC board. e New accessories such as an insertion cover for efficient manual or robotic assembly and application tooling to as- sure reliable cable and PCB assembly processing. 271Key Features Dual-sided contact spring for a consistent and reliable connection. e Range of sizes includes 12, 26 and 50 positions. e Wide entry area for reliable mating. Integral anti-twist design to prevent contact damage. High temperature liquid crystal polymer (LCP) plastic housing. Integral, molded-in coding slots. e Three termination types available: Thru-hole, straight and 90 SMT, straight and 90 IDC for .635mm (.025) ribbon cable e Variety of mounting options for plug and socket connectors for greater design flexibility. e Light-weight a 50 position connector weighs less than 2 grams (.07 02.). Performance and Material Specifications Insulation resistance 2104 MQ Minimum contact wipe 2.2mm Temperature range 65C...4125C Number of positions 12, 26, 50 Permissible humidity Annualaverage Test class 65/125/56 <80%,max.100% Operating current * (Amps) at + 20C 1.2A ambient + 70C O.9A temperature of: +100C 0.6A Test voltage 50Hz,1min Contact/Contact 500 Ver Contact/Ground 750 Vor Creepage distance and clearance Contact/Contact Clearance 20.37 mm Creepage 20.4 mm Contact resistance $20 mQ Specifications for Ribbon cable The SMC insulation displacement (IDC) socket connec- tor uses a 0.635mm (.025) grid ribbon cable with the fol- lowing properties: Spacing for Stacked Connector Mating ___Piggyback board Ml Xo 4 oe = | SCRE CE ey Si! A ai a 6 ke OS et) pet i 1 Pat ED N\ \ \_Base board 272 Max. temperature load +285C for 3 sec. Shock and No discontinuity at 20g and vibration 10...2000Hz Service life 2500 mating cycles Housing material LCP 30%GV Connector mating force Max 25 N Flammability rating UL 94 V-0 Connector press-in force (with mounting pegs) 100 N *Thevaluesgivenrefertosimultaneousloadonall contacts with the con- nector loose. Deviations from these figures may occur depending onthe application environment. Insulation material: PVC individual conductor size: Round wire: Dia. 0.25mm Stranded wire 7 x 0.1mm Temperature range: 20C...+105C Test voltage: 1500V Conductor resistance: max 354 Q/km Insulation resistance: min 30MQxkm Ordering Information Atl ERNI connectors are assigned a unique 6 digit part number which also can be found on the part itself. Please refer to this part number for any inquiry. The following pages of this catalog provide these part numbers along with the product descrip- tions noted below. Please refer back to this page for any clarifi- cation of the product description. Ee . M=Male plug g. Productname Type No. of contacts F=Female socket a aa i ee Description: SMC-B-50 M ab ~....... Pows assigne ERNI Part Number:/ 933560 | | 033561 | 004442 B = Standard type: straight socket, 90 plug Q = Inverse type: straight plug, 90 socketMounting Options The SMC series comes with a variety of options for fastening the connectors to a printed circuit board (PCB).The SMC con- nectors for PCB-to-PCB connecting, thru-hole solder and surface mount (SMT) terminations come with round hole mounting flanges for screw or rivet mounting to the PCB. These thru-hole or SMT versions are also offered with pre installed rivets. Another mounting option features integral molded-in mounting pegs for alignment and fastening to the PCB. For SMT applications, the integral mounting peg in- . ) socket connectors bon cables Insuiavion displacerrtg for C.635aun 1.0257) cludes a metal lead for additional mechanical attachment dur- ing the SMT soldering process as well as a cover for manual or robotic assembly. The SMC plug connectors for cable~to-PCB connecting are available with Ejector Latches for a positive lock when fully mated to the insulation displacement (IDC) socket connector. For additional information or applications please contact the ERNI sales office. BP plug commectors witht ctor tees 7 273SMC Type B Standard Design 2 row; 12, 26 or 50 contacts Plug and Socket Connectors with Thru-hole Solder Connection Terminals and Various Mounting Options Dimensional drawings Plug connector Mounting flange for screws or rivets Mounting Variations Plug connector 15% i L Mounting flanges for screws or rivets Dimensions (mm) Socket connector a ikyo\? geo 3.05 os | ju 1.27 42 [| 1.1 w wm | == { TILED cee N A bt H 3.05, . x . nN A x vi ~ for One option availabie: Option A: Requires press-in tool for PCB assembly 22 bt | ct a| i oy a 4 ~] oO i Ud t | a2 ara a Z ho 9 L=2.5/2.0 Mounting flanges with pre-installed rivets integral mounting pegs Socket connector | LH Le Mounting flanges for screws or rivets q 1 Te 4508 Mounting flanges with Integral mounting pegs pre-installed rivets No. of Contacts A:0.05 B Cc D E F Gio.03 H I 12 13.97 17.77 6.35 8.57 9.57 8.37 9.37 10.77 12.7 26 22.86 26.66! 15.24 17.46 18.46 17.26 18.26 19.66 21.6 50 38.1 41.9 30.48 33.7 34.7 33.5 34.5 34.9 36.8 274Ordering Information Dimensional drawings found on page 4 or 12, illustrations found on page 3. Round hole mounting flanges (screw or rivet mounting} Hole size: Dia. 1.6mm SMC-B-... M ab I 033560 | 033561, 004442_ Dimensional drawing see page 4 Plug and Socket Connectors with Thruhole Solder Connection Terminals and Various Mounting Options SMC-B... F ab PyvCvavevertyvresveubotyte 033562 | 033563 004441. lllustration see page 3 Round hole mounting flanges With pre-installed rivets for 1.0mm PC board thickness 053179 053 180. 053181 053182 053183/ 053 184 PC board thickness 1.0mm Dimensional drawing see page 4 PC board thickness 1.0mm lilustration see page 3 Round hole mounting flanges With pre-installed rivets for 1.6mm PC board thickness 053185 | 053186 053 187 053 188 | 053022 044651, PC board thickness 1.6mm Dimensionai drawing see page 4 PC board thickness 1.6mm illustration see page 3 Option A (Includes metal leads for optional soldering) Requires press-in tool (see page 15 Integral, molded-in mounting pegs | 053189 | 053 190 053 191 053 192 | 053193 053194 Dimensional drawing see page 4 Illustration see page 3 Ejector latches for mating to IDC socket Round hole mounting flanges (screw or rivet mounting) Hole size: 1.6mm 053195 053196 034517. Dimensional drawing see page 12 Ejector latches for mating to IDC socket With pre-installed rivets for 1.0mm PC board thickness 053197 | 053198 053199. PC board thickness 1.0mm Dimensional drawing see page 12 Ejector latches for mating to IDC socket With pre-installed rivets for 1.6mm_ PC board thickness 053200 | 053201 053 202 PC board thickness 1.6mm Dimensional drawing see page 12 Notes: The termination length of 2.2mm is suitable for PC boards with thickness 1.6-2.0mm. Please contact the ERNI sales office for other termination length options. For versions with integral coding feature. please contact ERNI sales office. Dimensional drawings for plug connectors with ejector latches for mating to IDC socket can be found on page 282. Recommended PCB drill hole dimension for thruhoie lead: 0.65+9-2mm. Required test dimension for plated thruhole is 0.54mm. Information on application tooling for pressing in the mounting pegs can be found on page 285. 275SMC Type B Standard Design 2 row; 12, 26 or 50 contacts Plug and Socket Connectors with SMT Connection Terminals and Various Mounting Options Dimensional drawings Piug connector Mounting flange for screws or rivets t ee ee +toe 82 Mounting Variations Plug connector ~ aii s Mounting flanges for screws or rivets L =2.5/2.0 Mounting flanges with pre-installed rivets bi 3.25 1,27 8.4 1.5 Oi5 ow Socket connector ews Co] Oe c- : aap = 42 | 1.55 Two options available: Option A: requires pressin tool for PCB assembly Option B: for | manual or robotic assembly Integral mounting pegs Socket connector | [ed Mounting flanges for screws or rivets | lL. | L22.5/2.0 4 | Te If Lt 02 1.5 38 Mounting flanges with pre-installed nvets OAS ou Integral mounting pegs Dimensions (mm) No. of Contacts Az0.05 B Cc D E F Gi0.03 H I 12 13.97 17.77 6.35 8.57 9.57 8.37 9.37 10.77 12.7 26 22.86 26.66 15.24 17.46 18.46 17.26 18.26 19.66 21.6 50 38.1 41.9 30.48 33.7 34.7 33.5 34.5 34.9 36.8 276Ordering Information Dimensional drawings found on page 6 or 12, illustrations found on page 3. Plug and Socket Connectors with SMT Connection Terminals and Various Mounting Options SMC-B-... M ab SMC-B.-... F ab Round hole mounting flanges ' 033564 033565 004862 | 033566 033567] 004861 | (screw or rivet mounting) Hole size: Dia. 1.6mm Dimensional drawing see page 6 iHustration see page 3 Round hole mounting flanges pee price wey . | - sy | 053 203 053204. 034230 / 053205; 053206. 053207 With pre-installed rivets for PC board thickness 1.0mm PC board thickness 1.0mm 1.0mm PC board thickness Dimensional drawing see page 6 lilustration see page 3 Round hole mounting flanges = ; my ps _ pose i | 053 208 | | 053209 | 033 690 | 053023, 053210 034427 | With preinstalled rivets for PC board thickness 1.6mm PC board thickness 1.6mm 1.6mm PC board thickness Dimensional drawing see page 6 lliustration see page 3 Integral, molded-in mounting pegs . .-. --, ,-- a . Option A | 053211 || 053212| . 053213 | (Includes metal leads for optional soldering) Requires pressin tool (see page 15 Dimensional drawing see page 6 illustration see page 3 053214 053215 | 053216 | Integral, molded-in mounting pegs poco ey poe ey Option B | 044985 | 053222; 053337, For manual or robotic assembly (includes metal leads for _ optional soldering) Dimensional drawing see page 6 \llustration see page 3 044984! 053220/ 053 221 | Ejector latches for mating . - - pogo | to IDC socket | 053223, 053224' 033606 With round hole mounting flange for screw or rivet mounting Dimensional drawing see page 12 Ejector latches for mating to IDC socket | 053225 | 053226 | | 053227, With pre-installed rivets for PC board thickness 1.0mm 1.0mm PC board thickness Dimensional drawing see page 12 Ejector latches for mating we pe to IDC socket 053 228 | | 053229 | 053230 | With pre-installed rivets for PC board thickness 1.6mm 1.6mm PC board thickness Dimensional drawing see page 12 Notes: e For versions with integral coding feature, please contact ERNI sales office. Dimensioned drawings for plug connectors with ejector latches for mating to IDC socket can be found on page 282. Oval or square soldering pads are recommended The SMT connectors terminal leads have been prestressed to provide a more flexible lead to accommodate the surface variations of the SMT salder pad. e Information on application tooling for pressing in the mounting pegs can be found on page 285. 277SMC Type Q 50 Inverse Design 2 row; 12, 26 or 50 contacts Plug and Socket Connectors with Thru-hole Solder Connection Terminals and Various Mounting Options Dimensional drawings Plug connector Mounting flange for screws or rivets | I ch Vy > a | og ep Mounting Variations Plug connector Socket connector sgn? 22 , H 1 i at One option available: Option A: requires pressin tool for PCB assembly Socket connector a Mounting flanges Mounting flanges with Integral mounting pegs Mounting flanges Mounting flanges with Integral mounting pegs for screws or rivets pre-installed sivets for screws or rivets pre-installed rivets Dimensions (mm) No. of Contacts | A:00s B c D E F Gioos | H 1 12 13.97 17.77 6.35 8.57 9.57 8.37 9.37 10.77 12.7 26 22.86 26.66 15.24 17.46 18.46 17.26 18.26 19.66 21.6 50 38.1 41.9 30.48 33.7 34.7 33.5 34.5 34.9 36.8 278Ordering Information Dimensional drawings found on page 8 or 12, illustrations found on page 3. Plug and Socket Connectors with Thru-hole Solder Connection Terminals and Various Mounting Options uly 3 fpnet io) Round hole mounting flanges SMC-Q.... M ab SMC-Q-... F ab 033568, 033569. 004901 , 033574 033575 004443 (screw or rivet mounting) Hole size: Dia. 1.6mm Dimensional drawing see page 8 lilustration see page 3 Round hole mounting flanges . / ; |: 053231 | 053232 053 233 ; 053 234 | 053 235 |. 053 236 | With pre-installed rivets for 1.0mm PC board thickness PC board thickness 1.0mm Dimensional drawing see page 8 PC board thickness 1.0mm Illustration see page 3 Round hole mounting flanges With pre-installed rivets for 1.6mm PC board thickness E 053021 053237_ oI a PC board thickness 1.6mm Dimensional drawing see page 8 053238 053239, 044650 PC board thickness 1.6mm Wlustration see page 3 Option A (Includes metal leads for optional soldering) Requires pressin toal (see page 15 Integral, molded-in mounting peas 053240 . 053241 053242 053 243 | Dimensional drawing see page 8 illustration see page 3 053244 053245 Ejector latches for mating to IDC socket With round hole mounting flange for screw or rivet mounting. 053246 | 053247 034516 Dimensional drawing see page 12 Ejector latches for mating to IDC socket With pre-installed rivets for 1.0mm PC board thickness 053249 053 250 PC board thickness 1.0mm Dimensional drawing see page 12 053 248 | Ejector latches for mating to IDC socket with pre-installed rivets for 1.6mm PC board thickness 053251 | 053252 053 253 | PC board thickness 1.6mm Dimensionai drawing see page 12 Notes: For versions with integral coding feature, please contact ERNI sales office. Dimensioned drawings for plug connectors with ejector latches for mating to IDC socket can be found on page 282. Recommended PCB drill hole dimen sion for thruhole lead: 0.65+9-2mm. Required test dimension for plated thruhole is 0.54mm Information on application tooling for pressing in the mounting pegs can be found on page 285. 279SMC Type Q Inverse Design 2 row; 12, 26 or 50 contacts Plug connectors with SMT Connection Terminals and Various Mounting Options Dimensional drawings xpA Plug connector Socket connector currently not available Mounting flange for screws or rivets S| Ey Boec |aooo Tt a Of gs safe WA iP fad itt : 1.5 Integral, molded-in mounting pegs 4 1.27 OAS 28 w rt LL ~ mt go} aoa fl i | ooo) sooo ih ncnachin, lancnnchn hs Eee area i Lott fe | 4.2 ms Mounting Variations Two options available: Option A: requires pressin tool for PCB assembly __Option B: for manual or robotic assembly Plug connectors 280 1.6 4 | I at " rr ry cpsiee hal H i A | | i Mounting flanges Mounting flanges with Integral mounting pegs for screws or rivets pre-installed rivets Dimensions (mm) No. of Contacts A:0.05 B Cc D E H 1 12 13.97 17.77 6.35 8.57 9.57 10.77 12.7 26 22.86 26.66 15.24 17.46 18.46 19.66 21.6 50 38.1 41.9 30.48 33.7 34.7 34.9 36.8Ordering Information Dimensional drawings found on page 10 or 12, illustrations found on page 3. Plug Connectors with SMT Connection Terminals and Various Mounting Options Round hole mounting flanges (screw or rivet mounting) Hole size: Dia. 1.6mm a SMCQ-... M ab 033572 | _ 033573 | 004863 _ Dimensional drawing see page 10 Currently not available Round hole mounting flanges With pre-installed rivets for 1.0mm PC board thickness 053255 053 256 | PC board thickness 1.0mm Dimensional drawing see page 10 053 254 | | i Round hole mounting flanges With pre-installed rivets for 1.6mm PC board thickness 053024 | 034824 | PC board thickness 1.6mm Dimensional drawing see page 10 053 257 Integral, molded-in mounting peg Option A (Includes metal leads for optional soldering) Requires pressin tool (see page 15 053 258 | | 053 259 | | 053 260 | Dimensional drawing see page 10 Integral, molded-in mounting pegs Option B For manual or robotic assembly (Includes metal leads for optional soldering) 053 261 | 053262 | _ 053 263 | Dimensional drawing see page 10 Ejector latches for mating to IDC socket With round hole mounting flange for screw or rivet mounting. 053264 . 053265 033607 Dimensional drawing see page 12 Ejector latches for mating to IDC socket With pre-installed rivets for 1.0mm PC board thickness 053266 053267 053268. PC board thickness 1.0mm | Dimensional drawing see page 12 Ejector latches for mating to IDC socket With pre-installed rivets for 1.6mm PC board thickness k 053269 | 053270 053271. PC board thickness 1.6mm ; Dimensional drawing see page 12 | Notes: For versions with integral coding feature, please contact ERNI sales office. Dimensioned drawings for plug connectors with ejector latches for mating to IDC socket can be found on page 282. Oval or square soldering pads are recommended (See page 14) The SMT connectors terminal leads have been prestressed to provide a more flexible lead to accommodate the sureface variations of the SMT scider pad. Information on application tooling for pressing in the mounting pegs can be found on page 285. 281SMC Type B &Q Plug Connectors for Cable-to-PCB Connecting PCB Mount Plug connectors with Ejector Latches for Mating to Insulation Displacement (IDC) Socket Connectors Dimensional drawings Plug connector SMC Type B tw 1.27 8 34 Part numbers for the various plug contigurations with options for mounting flanges can be found on pages 5, 7, 9or 11 depending on the Type (Standard or Inverse) and the PCB mounting (Thruhole or SMT) Mounting Variations Mounting flanges for screws or rivets Mounting fianges with pre-installed rivets Insulation Displacement (IDC) Socket Connectors Socket Connector with Insulation Displacement (IDC) Terminals Contacts for 0.635mm (.025) grid Ribbon Cables Dimensional drawings Socket connector 11 Dimensions (mm) No. of contacts Ax0.05 Cc D E F Gi0.03 Jeo K:01 12 13.97 6.35 8.57 9.57 8.37 9.37 21.77 14.57 26 22.86 15.24 17.46 18.46 17.26 18.26 30.66 23.46 50 38.1 30.48 33.7 34.7 33.5 34.5 45.9 38.7 282Ordering Information Dimensional drawings found on page 12, illustrations found on page 3. Socket Connector with Insulation Displacement (IDC) Terminals for 0.635mm (.025) Ribbon Cables : ees me SOS i SCD Part numbers for the various plug SMCB configurations with options for ay mounting flanges can be found on \Oo pages 5, 7, 9 and 11 depending on the Type (Standard or Inverse) and the PCB mounting (thru-hole or SMT). .. Fab The IDC socket connector can mate with any SMC plug not available | 044663 | 044658 024403 | connector with or without : " " ejector latches. Dimensional drawing see page 12 _ | Illustration see page 3 | Notes: e For information on appropriate ribbon cable, see pages 2 and 15. The IDC socket connector can mate with any SMC plug connector with or without ejector latches. e During PCB installation (with screws or rivets) of the mounting flanges of the straight plug connectors with ejector latches, the ejector latches should be pressed outward completely to provide clearance around the mounting flange (Please use caution when pressing the ejectors to this outward position). After completing PCB mounting of the mounting flange, the ejector latches should be returned to the original open, stop point position, e Prior to mating an IDC socket connector to a PCB mount plug connector with ejector latches, the latches must be in the open position but not beyond the stop point (see diagram below). e For information on insulation displacement (IDC) tooling, see page 15. important note on the use of the plug connectors with ejector latches. To prevent damage to the plug | connectors ejector latches dur- ing mating, the ejector latches must not be opened beyond the stop point. For PCB installation on the mounting flanges, the ejector latches can be pressed outward completely. a saa cli NUTT 283Suggested Mounting Hole Patterns Dimensional drawings Plug connectors Type B (solder) Plug connectors Type B (SMT) Socket connectors Type Q (solder) H=0.05 H+0.05 1 3.81 sooseesgesese SODOOTO SOO 9O9090000000690000006000 eeetttttt tt ttt ttt fi. Plug connectors Type Q (solder) Plug connectors Type Q (SMT) Socket connectors Type B (solder) Socket connectors Type B (SMT) H+0.05 H=0.05 7 oer 3,81 127 | Weverevrerrrrererrttesicey aS > & A SPIOGPPSCOHSOOOOHIG SOHO OO GOD 16 an SRERRERESTRTRRSR ERR ES SERSTERTERAEREEER REED + Plug connectors Type B with integral mounting pegs (SMT) ; H20,05 . | 2298 #8 SSRSSESRECRRE REESE SRRRERRTERR CRASS LC [> Soldering-pads for metal 9 ~~ 12 lead on mounting pegs Plug connectors Type Q with integral mounting pegs (SMT) Socket connectors Type B with integral mounting pegs (SMT) H#0.05 / 12 avncessessaeesenensenene | The metal lead of the mounting pegs can be soldered to a SMT pad. Ordering Information Coding Accessories SMC connectors have an integral coding system. Both the plug and socket connectors have molded slots on the sides into which coding tabs can be inserted. This provides for multiple coding arrangements. For example, the SMC 50 position connectors have up to 252 coding options. Coding Tabs (10 per assembly) Part Number | 433 620 284Ordering Information, Ribbon Cable Part no., 50 conductor Part no., 26 conductor Part no., 12 conductor Part no. for 1 meter 034 575 053 787 053 786 Ordering Information, Application Tooling for Mounting Pegs Mounting pegs are pressed into the drill holes of the PC board with the aid of a mounting peg insertion tool. This tool can be installed onto a manual hand toal or an arbor press. Mounting Peg Insertion Tool No. of Contacts 12 26 50 for hand tool 053 286 | 053285 | 053 284 for arbor press 053 142 | 053 141 053 118 Manual Hand Tool for use with Mounting Peg Insertion Too! Part number | 053 283 Ordering Information, Tooling for Rivet Mounting SMC connectors can be supplied with pre-installed, 1.5mm (.059) rivets in the connectors round hole mounting flanges. Standard rivet tooling or the following tooling is recommended. Rivet Tooling Fixtures No. of contacts 12 26 50 for hand tool 053 289 | 053288 | 053 287 for arbor press 053 296 | 053295 | 651050 Manual Hand Tool for use with Rivet Tooling Fixtures Part number | 053 283 Ordering Information, Insulation Displacement (IDC) Tooling Cable alignmentfixtures are necessary for proper IDC terminat- ing of 0.635mm (.025) cable to the SMC socket connectors. Cable Alignment Fixture for IDC Termination No. of contacts 12 26 50 for hand too! 053 292 | 053 291 053 290 for arbor press 053 294 053 293 034 828 Manual Hand Tool for use with Cable Alignment Fixtures for IDC Part number 053 283 285Ordering Information Connector Covers for Automated Assembly Covers for the automated PC board assembly of SMC con- nectors are available. These covers are placed over the mating side of the connector for compatibility with robotic, pick and place assembly equipment (vacuum suction type). Mounting cover | Number of Contacts 12 | 26 | 50 | Part no. for plugs on request Partno.forsockets | 044913 | 044912 | 044911 Additional Information SMC Connector System Highlights The continued expansion of electronic applications has in- creased the demand for high density, high performance inter- connection products. To meet these emerging needs, ERNI has engineered the SMC BoardtoBoard and Cable-to Board Connector System. Based on more than 40 years of experience, the SMC is a min- iature connector system with a 1.27mm (.050) centerline, per- mitting a high degree of design and packaging versatility. There are three types of termination: Thru-hole straight and right angie; SMT straight and right angle; and IDC for .635mm (.025") ribbon cable. ERNis SMC connectors also are avail- able in a range of sizes to satisfy your individual application needs. The SMC connector system offers a variety of options for reli- able PC board interconnection. For thru-hole and surface mount terminations (SMT), these connectors come with round hole mounting flanges for screw or rivet mounting. An addi- tional mounting option features integral molded-in mounting pegs for alignment and fastening to the PCB. For SMT applica- tions, the integral mounting peg includes a metal lead for addi- tional mechanical attachment during the SMT soldering pro- cess as well as a cover for manual or robotic assembly. With ever-increasing packaging density requirements, ERNI continues to explore new interconnection alternatives. A suc- cessful track record and thousands of satisfied customers guarantees our product performance and customer satisfac- tion. We invite your inquiry and look forward to helping you achieve a reliable, cost-effective system design. 286