resistors WK73 high power, wide terminal type flat chip resistors EU features • Wide-side termination (reverse-geometry) type flat chip resistor • 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 L c 2B (0612) W Inner Resistive Electrode Film d 2H (1020) Solder Plating Ni Plating t Type 2J (1218) Protective Coating Ceramic Substrate 3A (1225) Derating Curve 100 80 80 % Rated Power 100 % Rated Power L (Inch Size Code) c 60 40 Dimensions inches (mm) W c d .063±.006 .126±.006 .012±.008 .018±.006 (1.6±0.15) (3.2±0.2) (0.3±0.2) (0.45±0.15) .098±.006 .197±.006 .016±.008 (2.5±0.15) (5.0±0.15) (0.4±0.2) .122±.006 .181±.006 .016±.008 .030±.006 (3.1±0.15) (4.6±0.15) (0.4±0.2) (0.75±0.15) .024±.004 (0.6±0.1) .122±.006 .252±.006 .018±.008 (3.1±0.15) (6.3±0.15) (0.45±0.2) 3A (90°C) 2H, 2J (100°C) 2B (105°C) 60 40 20 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 20 40 60 80 100 120 140 160 90 105 155 Terminal Part Temperature (°C) 0 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. Please refer to “Introduction of the derating curve based on the terminal part temperature” on the beginning of our catalog before use. 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 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 Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 24 t F Resistance Tolerance D: ±0.5% F: ±1% J: ±5% 11/27/14 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 applications and ratings Part Designation Power Rating WK73S2B 0.75W (1.0W*) WK73R2B WK73S2H ±800 ±200 ±100 ±100 ±800 ±200 ±100 ±100 ±200 ±800 ±200 ±100 ±100 ±200 ±800 ±300 ±200 ±100 ±100 ±200 0.75W 1.0W WK73R2H 1.0W WK73S2J 1.0W WK73R2J T.C.R. (X 10-6/K) 1.0W WK73S3A 1.5W (2.0W*) WK73R3A 1.5W (2.0W*) Resistance Range (Ω) D±0.5% E-24/E-96 — — — 10 - 1M — — — — — — — — — — — — — — — — F±1% E-24/E-96 — 30m - 422m 430m - 9.76 10 - 1M — 27m - 215m 220m - 9.76 10 - 430k 432k - 1M — 33m - 237m 240m - 9.76 10 - 510k 511k - 1M — 22m - 32.4m 33m - 357m 360m - 9.76 10 - 330k 332k - 1M J±5% E-24 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 Maximum Operating Rated Working Overload Terminal Temp. Voltage Voltage Part Temp. Range 200V 400V 200V 400V 105°C 100°C 200V 400V 200V 400V -55°C to +155°C 90°C Rated ambient temperature: +70°C Rated voltage = √Power rating x resistance value or max. working voltage, whichever is lower * Please refer to the “Higher Power Ratings” statement in the beginning of the catalog. Contact KOA prior to usage. 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. 12/05/14 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com 25 resistors WK73