Resistors Compact Flameproof Power Compact Flameproof Power Wirewound Resistors Wirewound Resistors Welwyn Components WP-S Series WP-S Series Small size for power rating Enhanced pulse handling Small size for power rating capability Flameproof protection Enhanced pulse handling capability Flameproof protection SMD Z-form available Surfacecompliant mount ZI-form RoHS withoption Pb-free terminations RoHS compliant with Pb-free terminations All Pb-free parts comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3) Electrical Data WP1S WP2S WP2S / WPP2R WP25S WP3S WP4S WP5S Power rating at 25 C watts 1 2 2.5 3 4 5 5s overload rating at 25C watts 5 10 12.5 15 20 25 Short pulse performance See Pulse Performance graphs Resistance range ohms Limiting element voltage volts TCR R068 to 430R R05 to 900R 50 50 75 ppm/C Isolation Voltage v olts Resistance Tolerance % R05 to 900R R01 to 2K2 R01 to 10K R015 to 6K8 100 150 100 1R: 200 <1R: 350 250 350 <20R: 5 20R: 1, 2, 5 Standard Values 500 <R10: 5 <20R: 5 R10: 1, 2, 5 20R: 1, 2, 5 E24 preferred Thermal Impedance C/watt Ambient temperature range 140 110 90 C 82 62 54 -55 to +155 Physical Data Dimensions (mm) & Weight (g) Type L max D max f min d nom WP1S 6.2 2.8 21.20 0.6 WP2S 9.0 3.6 19.80 12.70 WP25S 12.5 4.5 17.80 18.40 WP3S 14.5 5.2 (Note 1) 24.55 WP4S 13 5.6 (Note 2) 22.75 WP5S 16.5 7.0 (Note 3) 23.55 0.8 PCB mount centres Min bend radius Wt. nom 10.20 0.6 0.22 20.30 D 0.50 0.50 1.2 18.90 22.86 1.10 1.00 d L f 1.75 Note 1: 5.4 for values 0R1 Note 2: 5.8 for values 0R1 Note 3: 7.2 for values 0R1 Construction A high purity ceramic substrate is assembled with interference fit end caps to which are welded the terminations. The resistive element is wound on the substrate and welded to the caps. Flameproof silicone cement coating is applied prior to marking with indelible ink. The components are then leadformed if required and packed. General Note General Note Welwyn Components reserves the rightchanges to make changesspecification in product specification notice or liability. TT Electronics reserves the right to make in product without noticewithout or liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. (c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK (c) TT Electronics plc BI Technologies IRC Welwyn Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com A subsidiary of www.ttelectronics.com/resistors TT electronics plc 08.10 06.18 Compact Flameproof Compact Flameproof Power Power Wirewound Resistors Wirewound Resistors Power Compact Flameproof WP-S Series WP-S Series WP-S Series Wirewound Welwyn Components Resistors Welwyn Components WP-S Series Terminations Terminations Material: Material: Strength: Strength: Material: Solderability: Solderability: Hot Hot tin tin dipped dipped copper copper wire wire The The terminations terminations meet meet the the requirements requirements of of IEC IEC 68.2.21 68.2.21 Hot tin dipped copper wire The terminations The terminations meet meet the the requirements requirements of of IEC IEC 115-1 115-1 Clause Clause 4.17.3.2 4.17.3.2 Strength: Solderability: The terminations meet the requirements of IEC 68.2.21 The terminations meet the requirements of IEC 115-1 Clause 4.17.3.2 Marking Marking WP1S, WP1S, WP2S, WP2S, WPP2R, WPP2R, WP25S WP25S and and WP3S WP3S resistors resistors R10 R10 and and above above are are marked marked with with four four or or five five colour colour bands bands in in conformance. conformance. with IEC62. below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there isis no with IEC62. below R10 are marked with three bands (two digits indicating value in milliohms, and tolerance); there no multiplier multiplier WP1S, WP2S, WPP2R, WP25S and WP3S resistors R10 and above are marked with four or five colour bands in conformance. band. WP5S resistors are marked with type reference, resistance and band. WP4S and WP5S resistors are legend legend marked with(two typedigits reference, resistance value and tolerance. tolerance. withWP4S IEC62.and below R10 are marked with three bands indicating value value in milliohms, and tolerance); there is no multiplier band. WP4S and WP5S resistors are legend marked with type reference, resistance value and tolerance. Solvent Resistance Solvent Resistance The The body body protection protection and and marking marking are are resistant resistant to to all all normal normal industrial industrial cleaning cleaning solvents solvents suitable suitable for for printed printed circuits. circuits. The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Flammability Flammability The The resistor resistor coating coating will will not not burn burn or or emit emit incandescent incandescent particles particles under under any any condition condition of of applied applied temperature temperature or or power power overload. overload. The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Performance PerformanceData Data Maximum Maximum Dry heat: 1000hrs @ 200C Dry heat: 1000hrs @@ 200C Dry heat: 1000hrs 200C Short term overload (5 xx Pr for 5s) Short term overload (5(5 Pr forfor 5s)5s) Short term overload x Pr Typical Typical Change Change Maximum R% R% R% R% R% R% R% R% R% Load at Load at rated rated power: power: 1000hrs 1000hrs @ @ 25C 25C Load at rated power: 1000hrs @ 25C Typical Change 55 +0.001 +0.001 5 +0.001 33 3 55 +0.001 +0.001 5 +0.001 33 3 55 +0.001 +0.001 5 +0.001 D rraatrteaedtdepd DeeDrraeatrtiainntgg frroofm poopw w @ infg rm om oeewrre@ r 22 @552C 5CC 11 1 ZZeeZrroeorao atta22t882008C 0CC Climatic Climatic Climatic R% R% R% 55 +0.001 +0.001 5 +0.001 R% R% R% R% R% R% R% R% R% 5 +0.001 55 +0.001 +0.001 11 1 5 +0.001 55 +0.001 +0.001 11 1 5 +0.001 55 +0.001 +0.001 11 1 22 2 Climatic category Climatic category Climatic category 55/200/56 55/200/56 55/200/56 TRC Vibration TRC & Vibration TRC && Vibration Robustness solder heat Robustness & solder heat Robustness && solder heat Long term damp heat (56 days) Long term damp heat (56 days) Long term damp heat (56 days) PulsePerformance Performance Pulse The pulse energy capacity limits in the graph below relate to pulses below 100ms duration, low mean power dissipation and at The The pulse pulse energy energy capacity capacity limits limits in in the the graph graph below below relate relate to to pulses pulses below below 100ms 100ms duration, duration, low low mean mean power power dissipation dissipation and and at at 25C. 25C. 25C. WP-S Short Pulse Energy Capacity WP-S WP-S Short Short Pulse Pulse Energy Energy Capacity Capacity 100 Energy (joules) Energy (joules) 100 100 10 10 10 WP5S WP5S WP5S 1 11 WP25S WP3S WP3S WP2S / WPP2R WP25S WP25S WP1S WP2S WP2S // WPP2R WPP2R WP2S / WPP2R 0.1 0.1 0.1 0.1 0.1 0.1 (c) Welwyn Components Limited WP4S WP4S WP4S WP3S 1 10 100 10 100 10Value (ohms) 100 Value (ohms) Bedlington, Northumberland NE22Value 7AA, UK(ohms) 11 WP1S WP1S 1000 1000 1000 10000 10000 10000 General Note Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com BI Technologies TT Electronics reserves the right to make changes in product specification without notice or liability. All information is(0) subject to822181 TT Electronics' own +44 data(0) and1670 is considered accurate at time of going to print. Telephone: 1670 ** Facsimile: 829465 Telephone: +44 +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 ** Email: Email: info@welwyn-tt.com info@welwyn-tt.com ** Website: Website: www.welwyn-tt.com www.welwyn-tt.com (c) (c) Welwyn Welwyn Components Components Limited Limited Bedlington, Bedlington, Northumberland Northumberland NE22 NE22 7AA, 7AA, UK UK 08.10 IRC Welwyn 08.10 08.10 www.ttelectronics.com/resistors (c) TT Electronics plc 06.18 Compact Flameproof Compact Flameproof Power Wirewound Resistors Wirewound Resistors Power Welwyn Components WP-S WP-SSeries Series Application Notes (Delete redundant subtitle) Application Notes 1. If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than 4mm from the body. Application Notes 2. Due temperature imposed by some PCB materials, derating may be necessary. of the closer than 1. If the resistors aretotooperating dissipate full ratedlimits power, it is recommended that the terminations should An notestimate be soldered rise to be expected at the center of the body can be calculated using the thermal impedance figures given under 4mm from thetemperature body. Electrical Data. 2. Due to operating temperature limits imposed by some PCB materials, derating may be necessary. An estimate of the 3. For the purpose of UL approval, the following points should be observed: temperature rise to3.1beToexpected at the ofconditions the bodyofcan be calculated using the impedance given under protect against firecenter under all overload, a positive clearance of thermal at least 13mm should befigures provided Electrical Data. between the body of the resistor and any combustible materials. 3.2 A positive clearance of 13mm should be provided between the resistor body or terminations and uninsulated parts of opposite or uninsulated dead metal parts.or lancet pre-formed leads. WP2S, WP3S, WP4S and WP5S are also 3. WP-S resistors can also polarity be supplied with radial, goalpost 3.3 Limited Short Circuit testing should be performed the complete appliance. available in an SMD format with Z formed leads and packed in inblister tape. Consult factory for details. 4. ULW resistors can also be supplied with radial, goalpost or lancet pre-formed leads. In particular ULW2, ULW3, ULW4 and are available in ZI-form SMD format packed in blister tape - see RadiaULW5 l Goalpost Lancet Z-form http://www.ttelectronics.com/sites/default/files/resistors-datasheets/ZI-form.pdf (This diagram exists on WP-S, so just copy it) Also a 2W radial taped version* is available as shown below Dimension Also a 2WRadial radial Taped taped Dimensions version* is available WPP2R (mm) as shown below. Notation Nominal Tolerance Packaging Component Body Length ULWP2R Radial Taped Dimensions (mm) Dimension L Notation 10.0 Max Nominal Tolerance 10.0Max Max Component BodyComponent DiameterBody Length DL 4.0 The standard packaging for Diameter WP-S is taped. The critical dimensions are shown in Figure 1. The component wires will not Component Body 4.0Nom Max Terminal Lead Diameter dD 0.8 protrude beyond the outside edge of the Taped product is then packed into boxes or onto reels; see Ordering Procedure Terminal Lead Diameter d tapes. 0.8 Nom Component Pitch P 12.7 0.5 Componentpackaging Pitch P 5request. 0.5 for details. Alternative is available by Pre-formed resistors are supplied loose packed in plastic bags or boxes. Pitch of Holes Po 12.7 0.2 Pitch of Holes Po 10 0.2 P1 3.85 0.3 P1 3.85 0.3 Distance between Hole &between Component Distance Hole & P2P2 5.85 0.5 Component 5.85 0.5 Lead Pitch FF 5.0 +0.75 -0.34 Figure 1 Lead Pitch 5.0 +0.75 -0.34 Dimensions (mm) c WW Width of BackingWidth Stripof Backingb Strip 18.0 0.3 18.0 0.3 Position 9.0 0.25 W1 9.0 0.25 WP1Sof Hole Position of Hole52 5W1 Do 4.0 0.3 Diameter of HoleDiameter of Hole Do 4.0 0.3 WP2S 5 Ho Height to Lead 52 Form 16.0 0.3 Height to Lead Form Ho 16.0 0.3 Ho1 17.0 Max MAX WP25S 52Form 5Ho1 C Height from LeadHeight Formfrom Lead 21.7 Height to Resistor Ho2 18.0 MIN Height to Resistor Ho2 18.0 Max WP3S 67 Tape 10 W2 Width of Adhesive 15.0 0.5 Width of Adhesive Tape W2 15.0 0.5 Length of protrusion l <2.5 WP4S 63 10 Length of protrusion l <2.5 f1 f2 b K1 2.0 0.3 2.0 0.3 WP5S 63 10K1K2 3.0 0.5 6 6 Form Dimensions K2K3 3.0 0.5 1.5 0.25 Form Dimensions Body location f1 - f2 < 1.4mm K3K4 1.5 0.25 1.0 0.2 *Although body dimensions differK4 slightly, ULWP2R and Electrical Data are identical to those of ULW2 1.0 Performance 0.2 *Although body dimensions differ slightly, WPP2R Performance and Electrical Data are identical to those of WP2S General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. BI Technologies IRC Welwyn (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) plc 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com (c) TT Electronics www.ttelectronics.com/resistors 08.10 06.18 Compact Flameproof Power Wirewound Resistors WP-S Series Packaging The standard packaging for WP-S is taped. The critical dimensions are shown in Figure 1. The component wires will not protrude beyond the outside edge of the tapes. Taped product is then packed into boxes or onto reels; see Ordering Procedure for details. Alternative packaging is available by request. Pre-formed resistors are supplied loose packed in plastic bags or boxes. Dimensions (mm) b c WP1S 52 5 WP2S 52 5 WP25S 52 5 WP3S 67 10 Figure 1 C Compact Flameproof Power WP4S 63 10 WP5S 63 10 Wirewound Resistors f1 6 WP-S Series b f2 6 Body location f1 Welwyn - f2 < 1.4mmComponents EMC REPLACEMENT Ordering Procedure Ordering Procedure Example: EMC2-33RMI ohms in 20%, Example: WP2S at 680 ohms(EMC2, and 5% 33 tolerance ammoPb-free) pack box of 2500 pieces Example: WP2S-680RJA25 (WP2S, 680 ohms 5%, Pb-free) E Type M W C P 2 2 1 1 Value (use IEC 62 code) 3 S WP2S2 3 R 6 -8 3 M I 0 680R R J 4 5 2 3 AJ 2 5 A25 4 1 2 3 4 5 Tolerance (use 1IEC 62 code) 2 3 4 Type Leadforming Value Tolerance Packing Type Value Tolerance Termination & Packing F EMC2 1% Blank = Axial 3/4 characters K = 10% I EMC2 Ammo 2000/box WP1S 3/4 characters = 1% MA5 WP1S 5000/box (c) Welwyn Components Limited NE22 7AA, UK R = Radial tapedBedlington, R =FNorthumberland ohms = 20% T15 EMC2R Reel 1500/reel G 2% Telephone: +44 (0) 1670 822181 *R Facsimile: +44 (0) 1670 info@welwyn-tt.com WP2S = ohms G =829465 2%* Email: A25 WP2S * Website: www.welwyn-tt.com 2500/box Ammo pack Pb-free J 5% WP25S K = kilohms J = 5% A15 WP25S 1500/box (RoHS) WP3S A1 WP3S, WP4S 1000/box WP4S T075 WP5S Tape & reel 750/reel Packing WP5S PB All sizes SnPb finish Packing as for Pb-free 08.10 WP-S ADDITIONAL A5 WP1S A25 WP2S 5000/box 2500/box Example: WPP2R-680RJT15 (WPP2R radially formed & taped, 680 ohms 5%, Pb-free) A15 A1 A1 Ammo W P P 2 1 Tape WP25S 1500/box WP3S 1000/box R WP4S - 61000/box 8 0 Standard R J T 5 2 WP5S 3 750/reel 1 2 3 4 5 Type Leadforming Value Tolerance Packing F = 1% G = 2% J = 5% T15 Tape & reel, 1500/reel T075 WPP2 R = Radial taped 3/4 characters R = ohms 4 1 5 General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics' own data and is considered accurate at time of going to print. BI Technologies IRC Welwyn www.ttelectronics.com/resistors (c) TT Electronics plc 06.18