WR12, WR08, WR06, WR04 1%, 5% General purpose chip resistors Size 1206, 0805, 0603, 0402 Customer : Approval No : Issue Date : Customer Approval : Page 1 of 9 WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 FEATURE 1. High reliability and stability 2. Reduced size of final equipment 3. Lower assembly costs 4. Higher component and equipment reliability 5. LoHS compliant and Lead free products APPLICATION * Consumer electrical equipment * Automotive application * EDP, Computer application * Telecom application DESCRIPTION The resistors are constructed in a high grade ceramic body (aluminum oxide). Internal metal electrodes are added at each end and connected by a resistive paste that is applied to the top surface of the substrate. The composition of the paste is adjusted to give the approximate resistance required and the value is trimmed to within tolerance by laser cutting of this resistive layer. The resistive layer is covered with a protective coat. Finally, the two external end terminations are added. For ease of soldering the outer layer of these end terminations is a Tin (lead free) alloy. Fig 1. Consctruction of a Chip-R Page 2 of 9 WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 QUICK REFERENCE DATA Item General Specification Series No. WR12 WR08 WR06 WR04 Size code 1206(3216) 0805(2012) 0603(1608) 0402(1005) Resistance Range Resistance Tolerance 1~10M(5% tolerance),10~1M(1% tolerance), Jumper 1% 5% 1% 5% 1% 5% 1% 5% E96/E24 E24 E96/E24 E24 E96/E24 E24 E96/E24 E24 TCR (ppm/C) 200 R1M 100 1MR10 200 R10 200 100 -300~+500 200 200 100 -300~+500 200 200 100 -300~+500 200 -300~+500 Max. dissipation @ Tamb=70C 1/4 W 1/8 W 1/10 W 1/16 W Max. Operation Voltage (DC or RMS) 200V 150V 50V 50V Max. Overload Voltage (DC or RMS) 400V 300V 100V 100V Climatic category 55/155/56 Note : 1. This is the maximum voltage that may be continuously supplied to the resistor element, see "IEC publication 60115-8" 2. Max. Operation Voltage : So called RCWV (Rated Continuous Working Voltage) is determined by RCWV = Rated Power x Resistance Value or Max. RCWV listed above, whichever is lower. 3. The resistance of Jumper is defined <0.05. DIMENSIONS (unit : mm) WR12 WR08 WR06 WR04 L 3.10 0.10 2.00 0.10 1.60 0.10 1.00 0.05 W 1.60 0.10 1.25 0.10 0.80 0.10 0.50 0.05 T 0.60 0.15 0.50 0.15 0.45 0.15 0.35 0.05 Tb 0.45 0.20 0.40 0.20 0.30 0.15 0.25 0.10 Tt 0.50 0.20 0.40 0.20 0.30 0.10 0.20 0.10 Page 3 of 9 WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 MARKING 5% 1% 1206 (3216) 3-digits marking 4-digits marking 0805 (2012) 3-digits marking 4-digits marking 0603 (1608) 3-digits marking 3-digits marking Size \ Nr. Of digit of code\tolerance N0 MARKING 0402(1005) 3-digits marking5% : 1206 & 0805 & 0603 Each resistor is marked with a three digits code on the protective coating to designate the nominal resistance value. For values up to 9.1 the R is used as a decimal point. For values of 10.0 or greater the first 2 digits apply to the resistance value and third indicate the number of zeros to follow. 3-digits marking1% : 0603 Nominal resistance Description 1.E-24 series As 0603 WR06X 5%. 2.E-96 series The 1st two digit codes are referring to the CODE on the table, the 3rd code is the index of resistance value : Y=10-2X=10-1A=100B=101C=102D=103E=104F=105 EX : 17.8=25X178=25A1K78 =25B 17K8=25C 178K=25D 1M78=25E 3. Remark There is no marking for the items are not under E-24 and E-96 series CODE R_value CODE R_value R_value CODE R_value CODE R_value CODE R_value CODE R_value 01 100 13 133 25 178 37 237 49 316 61 422 73 562 85 750 02 102 14 137 26 182 38 243 50 324 62 432 74 576 86 768 03 105 15 140 27 187 39 249 51 332 63 442 75 590 87 787 04 107 16 143 28 191 40 255 52 340 64 453 76 604 88 806 05 110 17 147 29 196 41 261 53 348 65 464 77 619 89 825 06 113 18 150 30 200 42 267 54 357 66 475 78 634 90 845 07 115 19 154 31 205 43 274 55 365 67 487 79 649 91 866 08 118 20 158 32 210 44 280 56 374 68 499 80 665 92 887 09 121 21 162 33 215 45 287 57 383 69 511 81 681 93 909 10 124 22 165 34 221 46 294 58 392 70 523 82 698 94 931 11 127 23 169 35 226 47 301 59 402 71 536 83 715 95 953 12 130 24 174 36 232 48 309 60 412 72 549 84 732 96 976 Page 4 of 9 CODE R_Value CODE WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 4-digits marking1% : 1206/0805 Each resistor is marked with a four digits code on the protective coating to designate the nominal resistance value. For values of <97.6 the R is used as a decimal point. For values of 100 or greater the first 3 digits are significant, the fourth indicates the number of zeros to follow. Example RESISTANCE 10 12 100 6800 47000 3-digits marking 1206 & 0805 & 0603 5% 100 120 101 682 473 10R0 12R0 1000 6801 4702 4-digits marking FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of 5%, and E96 series for resistors with a tolerance of 1%. The values of the E24/E96 series are in accordance with "IEC publication 60063" Derating The power that the resistor can dissipate depends on the operating temperature; see Fig.2 Figure 2 Maximum dissipation in percentage of rated power as a function of the ambient temperature for WR12X WR08X, WR06X, WR04X MOUNTING Due to their rectangular shapes and small tolerances, Surface Mountable Resistors are suitable for handling by automatic placement systems. Chip placement can be on ceramic substrates and printed-circuit boards (PCBs). Electrical connection to the circuit is by individual soldering condition. The end terminations guarantee a reliable contact. Page 5 of 9 WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 SOLDERING CONDITION The robust construction of chip resistors allows them to be completely immersed in a solder bath of 260C for 10 seconds. Therefore, it is possible to mount Surface Mount Resistors on one side of a PCB and other discrete components on the reverse (mixed PCBs). Surface Mount Resistors are tested for solderability at 235C during 2 seconds. The test condition for no leaching is 260C for 30 seconds. Typical examples of soldering processes that provide reliable joints without any damage are given in Fig 3. Fig 3. Infrared soldering profile for Chip Resistors CATALOGUE NUMBERS The resistors have a catalogue number starting with . WR12 X 472_ J T Size code Type code Resistance code Tolerance Packaging code WR12 : 1206 X : Normal 5% E24 : 2 significant digits followed by no. of zeros and a blank F : 1% T J : 5% Q : 10" Reeled taping P : Jumper G : 13" Reeled taping WR08 : 0805 WR06 : 0603 WR04: 0402 4.7 =4R7_ 10 =100_ 220 =221_ Jumper =000_ B : 7" Reeled taping L Termination code L = Sn base (lead free) : Bulk ("_" means a blank) 1%, E24+E96: 3 significant digits followed by no. of zeros 102 =1020 37.4K =3742 WR12,WR08,WR06: 1. Reeled tape packaging : 8mm width paper taping 5000pcs per 7" reel, 10kpcs per 10" reel, 20kpcs per 13" reel. 2. Bulk packaging : 5000pcs per poly-bag WR04: 1. Reeled tape packaging : 8mm width paper taping 10,000pcs per reel, 2. Bulk packaging Page 6 of 9 : 10,000pcs per poly-bag WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 TEST AND REQUIREMENTS(JIS C 5201-1 : 1998) Essentially all tests are carried out according to the schedule of IEC publication 115-8, category LCT/UCT/56(rated temperature range : Lower Category Temperature, Upper Category Temperature; damp heat, long term, 56 days). The testing also meets the requirements specified by EIA, EIAJ and JIS. The tests are carried out in accordance with IEC publication 68, "Recommended basic climatic and mechanical robustness testing procedure for electronic components" and under standard atmospheric conditions according to IEC 60068-1, subclause 5.3. Unless otherwise specified, the following value supplied : Temperature: 15C to 35C. Relative humidity: 45% to 75%. Air pressure: 86kPa to 106 kPa (860 mbar to 1060 mbar). All soldering tests are performed with midly activated flux. TEST REQUIREMENT PROCEDURE / TEST METHOD Electrical - DC resistance values measurement Characteristics - Temperature Coefficient of Resistance (T.C.R) Natural resistance change per change in degree centigrade. JISC5201-1: 1998 Clause 4.8 R2 - R1 x 106 R1 (t2 - t1 ) (ppm/C) 0 Resistor Within the specified tolerance Refer to "QUICK REFERENCE <50m t1 : 20C+5C-1C DATA" R1 : Resistance at reference temperature (20C+5C/-1 C) R2 : Resistance at test temperature (-55C or +155C) Resistance to soldering heat(R.S.H) JISC5201-1:1998 Clause 4.18 Solderability Un-mounted chips completely immersed for 101second in a SAC R/R max. (1%+0.05) solder bath at 2605C no visible damage Un-mounted chips completely immersed for 20.5 second in a SAC solder bath at 235 5 JISC5201-1: 1998 95% coverage min., <50m good tinning and no visible damage Clause 4.17 Temperature cycling JISC5201-1: 1998 30 minutes at -55C3C, 2~3 minutes at 20C+5C-1C, 30 minutes at +155C3C, 2~3 minutes at 20C+5C-1C, total 5 continuous cycles R/R max. (1%+0.05) <50m No visible damage Clause 4.19 High Temperature 1000+48/-0 hours; without load in a temperature chamber R/R max. (3.0%+0.10) Exposure controlled 1553C No visible damage <50m MIL-STD-202 method 108 Bending strength Resistors mounted on a 90mm glass epoxy resin PCB(FR4), bending R/R max. (1%+0.05) JISC5201-1: 1998 once 3mm for 10sec, 5mm for WR04 No visual damaged Pressurizing force: 5N, Test time: 10 1sec. No <50m Clause 4.33 Adhesion JISC5201-1: 1998 remarkable damage or removal of the terminations Clause 4.32 Short Time Overload R/R max. (2.0%+0.10) 2.5 times RCWV or max. overload voltage, for 5seconds (STOL) <50m No visible damage JISC5201-1: 1998 Clause 4.13 Page 7 of 9 WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 TEST REQUIREMENT PROCEDURE / TEST METHOD 0 Resistor 1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber R/R max. (3%+0.10) controller at 40C2C and 90~95% relative humidity, 1.5hours on and No visible damage 0.5 hours off Load life in Humidity JISC5201-1: 1998 <50m Clause 4.24 1000 +48/-0 hours, loaded with RCWV or Vmax in chamber controller R/R max. (3%+0.10) 702C, 1.5 hours on and 0.5 hours off No visible damage Load life (endurance) JISC5201-1: 1998 Clause 4.25 Insulation Resistance JISC5201-1: 1998 Clause 4.6 Dielectric Withstand Voltage JISC5201-1: 1998 Clause 4.7 Apply the maximum overload voltage (DC) for 1minute R10G Apply the maximum overload voltage (AC) for 1 minute No breakdown or flashover <50m TEST CONDITION FOR JUMPER (0 ) Item Power Rating At 70C WR12 WR08 WR06 WR04 1/4W 1/8W 1/10W 1/16W Resistance MAX.50m Rated Current 2A 1.5A 1A 1A Peak Current 5A 3.5A 3A 2A Operating Temperature Page 8 of 9 -55~155C WR12/WR08/WR06/WR04 Ver.15 Jul.-2010 PACKAGING Paper Tape specifications (unit :mm) Series No. A B WR12 3.600.20 2.000.20 WR08 2.400.20 1.650.20 WR06 1.900.20 1.100.20 WR04 1.200.10 0.700.10 Series No. P1 WR12 / WR08 W F E 8.000.30 3.500.20 1.750.10 P0 D T 4.000.10 1.50 +-00..10 Max. 1.0 4.000.10 WR06 0.650.05 2.000.10 WR04 0.400.05 7" Reel dimensions Page 9 of 9 Symbol A B C D (unit : mm) 178.02.0 60.01.0 13.00.2 9.00.5 WR12/WR08/WR06/WR04 Ver.15 Jul.-2010