resistors WK73 high power, wide terminal type flat chip resistors EU features • Flat chip resistors of wide terminal type • High reliability and performance with T.C.R. ±100 x 10-6/K, resistance tolerance ±1% • Marking: Black protective coat • Products with lead-free terminations meet EU RoHS requirements. EU RoHS regulation is not intended for Pb-glass contained in electrode, resistor element and glass. • AEC-Q200 Qualified: 0612(2B), 1020(2H), 1218(2J), 1225(3A) dimensions and construction Type L c c W t Inner Resistive Electrode Film d L (Inch Size Code) Solder Plating Ni Plating Protective Coating Ceramic Substrate Dimensions inches (mm) W c d t 2B (0612) .063±.006 .126±.006 .012±.008 .018±.006 (1.6±0.15) (3.2±0.2) (0.3±0.2) (0.45±0.15) 2H (1020) .098±.006 .197±.006 .016±.008 (2.5±0.15) (5.0±0.15) (0.4±0.2) 2J (1218) .122±.006 .181±.006 .016±.008 .030±.006 (3.1±0.15) (4.6±0.15) (0.4±0.2) (0.75±0.15) 3A (1225) .122±.006 .252±.006 .018±.008 (3.1±0.15) (6.3±0.15) (0.45±0.2) .024±.004 (0.6±0.1) Derating Curve 80 80 % Rated Power 100 % Rated Power 100 60 40 20 3A (90°C) 2H, 2J (100°C) 2B (105°C) 60 40 20 0 -60 -40 -20 -55 0 20 40 0 -60 -40 -20 -55 60 80 100 120 140 160 70 155 Ambient Temperature (°C) For resistors operated at an ambient temperature of 70°C or above, a power rating shall be derated in accordance with the above derating curve. ordering information New Part # WK73S 2J Type Size WK73S WK73R 2B: 0.75W 2H: 1W 2J: 1W 3A: 1.5W T Termination Material T: Sn 0 20 40 60 80 100 120 140 160 90 105 155 TerminalTemperature (°C) For resistors operated terminal temperature of described for each size or above, a power rating shall be derated in accordance with the derating curve above. TE Packaging TD: 0612: 7" 4mm pitch punched paper TE: 1020, 1218, 1225: 7" embossed plastic TED: 1020, 1218, 1225: 10" embossed plastic For further information on packaging, please refer to Appendix A 33L0 F Nominal Resistance ±1%: 3 significant figures + 1 multiplier “R” indicates decimal on value <100Ω ±5%: 2 significant figures + 1 multiplier “R” indicates decimal on values <10Ω All values less than 0.1Ω (100mΩ) are expressed in mΩ with “L” as decimal. Ex: 33mΩ, 1% = 33L0 Resistance Tolerance F: ±1% J: ±5% Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 18 12/17/12 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com high power, wide terminal type flat chip resistors NEW applications and ratings Part Designation Power Rating @ 70°C WK73S2B 0.75W WK73R2B 0.75W WK73S2H 1.0W WK73R2H 1.0W WK73S2J 1.0W WK73R2J 1.0W WK73S3A 1.5W WK73R3A T.C.R. (ppm/°C) Max. ±800 ±200 ±100 ±100 ±800 ±200 ±100 ±100 ±200 ±800 ±200 ±100 ±100 ±200 ±800 ±300 ±200 ±100 ±100 ±200 1.5W (2.0W)* Resistance Range (Ω) E-24 (F±1%) E-24 (J±5%) — 30m - 390m 430m - 9.1 10 - 1M — 27m - 200m 220m - 9.1 10 - 430k 470k - 1M — 33m - 220m 240m - 9.1 10 - 510k 560k - 1M — 22m - 30m 33m - 330m 360m - 9.1 10 - 330k 360k - 1M 10m - 27m 30m - 390m 430m - 9.1 10 - 1M 10m - 24m 27m - 200m 220m - 9.1 10 - 430k 470k - 1M 10m - 30m 33m - 220m 240m - 9.1 10 - 510k 560k - 1M 10m - 20m 22m - 30m 33m - 330m 360m - 9.1 10 - 330k 360k - 1M Maximum Working Voltage Maximum Overload Voltage 200V 400V 200V 400V Operating Temperature Range -55°C to +155°C 200V 400V 200V 400V * Please contact factory prior to use environmental applications Performance Characteristics Parameter Resistance T.C.R. Overload (Short time) Resistance to Solder Heat Bending Test Rapid Change of Temperature Moisture Resistance Endurance at 70°C High Temperature Exposure Requirement ∆ R ±(%+0.005Ω) Limit Typical Within specified — tolerance Within specified — T.C.R. ±2% ±0.2% ±1% ±0.2% ±1% ±0.1% ±0.5% ±0.1% ±2% ±0.2% ±2% ±0.2% Test Method 25°C +25°C/-55°C and +25°C/+125°C Rated Voltage x 2.5 for 5 seconds 260°C ± 5°C, 10 seconds ± 1 second Holding point 90mm, Bending 1 time, Bending 5mm -55°C (30 minutes), +155°C (30 minutes), 5 cycles 40°C ± 2°C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle ±2%: WK73S (±5%) ±0.5%: WK73S (±5%) +155°C, 1000 hours ±0.2%: all others ±1%: all others Additional environmental applications can also be found at www.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/17/12 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 19 resistors WK73