Walsin Technology Corporation WR12W / WR08W / WR06W / WR04W 1% (1 ~9.76 , 1.02M ~10M ) General purpose chip resistors Size 1206 / 0805 / 0603 / 0402 Customer : Approval No : Issue Date : Customer Approval : Page 1 of 7 WR12-08-06-04W Ver.16 Dec.-2009 Walsin Technology Corporation FEATURE 1. High reliability and stability 2. Reduced size of final equipment 3. Lower assembly costs 4. Higher component and equipment reliability 5. Lead (Pb) free product upon customer requested. 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) solder alloy. Fig 1. Consctruction of a Chip-R Page 2 of 7 WR12-08-06-04W Ver.16 Dec.-2009 Walsin Technology Corporation QUICK REFERENCE DATA Item General Specification Series No. WR12W WR08W WR06W WR04W Size code 1206 (3216) 0805 (2012) 0603 (1608) 0402 (1005) 1% (E96 series) Resistance Tolerance Resistance Range 1 ~ 9.76, 1.02M ~ 10M TCR (ppm/C) 200 ppm/C Max. dissipation at 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. Lead free terminations upon customer requested. Dimensions (unit : mm) WR12W WR08W WR06W WR04W 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 0.20 0.25 0.10 Tt 0.50 0.20 0.40 0.20 0.30 0.10 0.20 0.10 Page 3 of 7 WR12-08-06-04W Ver.16 Dec.-2009 Walsin Technology Corporation MARKING 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. 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 100 12R 101 682 473 4-digits marking 10R0 12R0 100R 6801 4702 No marking for 0402 size. FUNCTIONAL DESCRIPTION Product characterization Standard values of nominal resistance are taken from the E96 series for resistors with a tolerance of 1%,. The values of the 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 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 4 of 7 WR12-08-06-04W Ver.16 Dec.-2009 Walsin Technology Corporation 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 245C during 3 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 W 2R15 F T L Size code Type code Resistance code Tolerance Packaging code Termination code WR12 : 1206 W : F tolerance of 1~9.76, 1.02M~10M E96 : 3 significant digits followed by no. of zeros F : 1% T L = Sn base (lead free) WR08 : 0805 WR06 : 0603 WR04 : 0402 2.15 =2R15 5.11M =5114 : 7" Reeled taping Q : 10" Reeled taping G : 13" Reeled taping B : Bulk PACKING QUANTITY Reel size \ Series WR12W WR08W WR06W WR04W 7" reeled 5,000 pcs 10,000 pcs 10" reeled 10,000 pcs N/a 13" reeled 20,000 pcs N/a Bulk by polybag 5,000 pcs 10,000 pcs Page 5 of 7 WR12-08-06-04W Ver.16 Dec.-2009 Walsin Technology Corporation 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 PROCEDURE / TEST METHOD DC resistance JIS C 5202 5.1 / IEC 60115-1 4.5 Clause 4.5 DC resistance values measured at the test voltages specified below : REQUIREMENT Within the specified tolerance <10@0.1V,<100@0.3V,<1K@1.0V,<10K@3V,<100K@10V, <1M@25V, <10M@30V Temperature Coefficient of Resistance(T.C.R) Clause 4.8 Natural resistance change per change in degree centigrade. R2 - R1 x 106 R1 (t2 - t1 ) Refer to "QUICK REFERENCE DATA" (ppm/C) t1 : 20C+5C-1C R1 : Resistance at reference temperature R2 : Resistance at test temperature Short time overload (S.T.O.L) Clause 4.13 Resistance to soldering heat(R.S.H) IEC 60068-2-58:2004 Permanent resistance change after a 5sec application of a voltage R/R max. (2%+0.10) 2.5xUR or max. overload voltage, whichever is less. Un-mounted chips completely immersed for 101second in a SAC solder R/R max. (1%+0.05) bath at 2555C no visible damage Solderability Un-mounted chips completely immersed for 30.3 second in a SAC 95% coverage min., good tinning and solder bath at 2455 no visible damage IEC 60068-2-58:2004 Temperature cycling Clause 4.19 Damp heat (Humidity loaded in steady state) 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) 1000 +48/-0 hours, loaded with RCWV or Vmax in humidity chamber 10R : R/R max. (3%+0.10) Clause 4.24 controller at 40C2C and 90~95% relative humidity, 1.5hours on and R<10, R1M : R/R max. (5%+0.10) 0.5 hours off Load Life (Endurance) 1000+48/-0 hours; loaded with RCWV or Vmax in chamber controller Ditto Clause 4.25 702C, 1.5 hours on and 0.5 hours off Bending strength Clause 4.33 Resistors mounted on a 90mm glass epoxy resin PCB(FR4), bending No visual damaged, once for 10sec : 3mm (only 0402: 5mm) R/R max. (1%+0.05) Adhesion Pressurizing force: 5N, Test time: 101sec. Clause 4.32 Insulation Resistance No remarkable damage or removal of the terminations Apply the maximum overload voltage (DC) for 1minute R10G Apply the maximum overload voltage (AC) for 1 minute No breakdown or flashover JISC5201-1:1998 Clause 4.6 Dielectric Withstand Voltage JISC5201-1:1998 Clause 4.7 Page 6 of 7 WR12-08-06-04W Ver.16 Dec.-2009 Walsin Technology Corporation PACKAGING Paper Tape specifications (unit :mm) Series No. A B W WR12W 3.600.20 2.000.20 WR08W 2.400.20 1.650.20 WR06W 1.900.20 1.100.20 WR04W 1.200.10 0.700.10 Series No. P1 P0 F E 3.500.20 8.000.30 WR12W / WR08W 3.500.05 D T Max. 1.0 4.000.10 4.000.10 WR06W 1.50 +-00..10 0.650.05 2.000.10 WR04W 1.750.10 0.400.05 7" Reel dimensions Page 7 of 7 Symbol A B C D (unit : mm) 178.02.0 60.01.0 13.00.2 10.01.5 WR12-08-06-04W Ver.16 Dec.-2009