WK73R s r wide terminal type flat chip resistors o t s EU si e r 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 ±0.5% • 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 Type Dimensions inches (mm) dimensions and construction (Inch Size Code) L W c d t 1E .020±.002 .039±.002 .006±.002 .006±.002 .014±.002 L (0204) (0.5±0.05) (1.0±0.05) (0.15±0.05) (0.15±0.05) (0.35±0.05) c c 1J .031±.004 .063±.004 .006±.004 .008±.004 .018±.004 (0306) (0.8±0.1) (1.6±0.1) (0.15±0.1) (0.2±0.1) (0.45±0.1) W 2A .049±.006 .079±.006 .012±.008 .014±.008 .022±.004 (0508) (1.25±0.15) (2.0±0.15) (0.3±0.2) (0.35±0.2) (0.55±0.1) Solder 2B .063±.006 .126±.008 .012±.008 .018±.006 Plating (0612) (1.6±0.15) (3.2±0.2) (0.3±0.2) (0.45±0.15) t NPliating 2H .098±.006 .197±.006 .016±.008 Resistive IEnlneecrtrode (1020) (2.5±0.15) (5.0±0.15) (0.4±0.2) .024±.004 d Film 2J .122±.006 .181±.006 .016±.008 .030±.006 (0.6±0.1) Protective Coating Ceramic (1218) (3.1±0.15) (4.6±0.15) (0.4±0.2) (0.75±0.15) Substrate 3A .122±.006 .252±.006 .018±.008 (1225) (3.1±0.15) (6.3±0.15) (0.45±0.2) Derating Curve WK73R2B (1W), WK73R3A (2W) 100 100 100 2J (100°C) 80 80 80 er er er 2B, 3A (115°C) w w w Po60 Po60 1E, 1J, 2A, 2B, Po60 d d 2H, 3A (125°C) d e e e at40 at40 at40 R R R % % % 20 20 20 0 0 0 -60 -40 -20 0 20 40 60 80 100 120 140 160 -60 -40 -20 0 20 40 60 80 100120 140 160 -60 -40 -20 0 20 40 60 80 100 120140 160 -55 70 155 -55 125 155 -55 115 155 Ambient Temperature TerminalPart Temperature TerminalPart Temperature (°C) (°C) (°C) For resistors operated at an ambient temperature For resistors operated terminal temperature of described for each size or above, a power rating of 70°C or above, a power rating shall be derated shall be derated in accordance with the derating curve above. in accordance with the above derating curve. Please refer to “Introduction of the derating curve based on the terminal part temperature” in the beginning of our catalog before use. If you want to use at rated power (*1), use derating curves based on the terminal part temperature ordering information on the right side graph. WK73R 2J T TE 33L0 F Termination Nominal Resistance Type Size Packaging Material Resistance Tolerance WK73R 1E: 0.33W T: Sn TP: 0204: 7" 2mm pitch ±1%: 3 significant figures + 1 D: ±0.5% 1J: 0.5W punched paper multiplier “R” indicates decimal F: ±1% TD: 0306, 0508, 0612: 7" on value <100Ω 2A: 0.75W, 1W J: ±5% 4mm pitch punched paper ±5%: 2 significant figures + 1 2B: 0.75W, 1W TE: 1020, 1218, 1225: multiplier “R” indicates decimal 2H: 1W 7" embossed plastic on values <10Ω 2J: 1W For further information on All values less than 0.1Ω packaging, please refer 3A: 1.5W, 2W (100mΩ) are expressed in mΩ to Appendix A 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. 12/17/19 31 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com

WK73R r e s wide terminal type flat chip resistors is t o r applications and ratings s Rated Rated Resistance Range (Ω) Maximum Maximum Operating Part Power T.C.R. Ambient Terminal Working Overload Temp. Designation Rating (X 10-6/K) D±0.5% F±1% J±5% Temp. Part Temp. Voltage Voltage Range E-24/E-96 E-24/E-96 E-24 WK73R1E 0.33W1 –– 125°C ±100 –– 10 -1M 10 - 1M 75V 100V WK73R1J 0.5W1 –– 125°C ±100 –– 10 - 1M 10 - 1M 150V 200V 0.75W1 –– 125°C ±100 –– 20.5k - 1M 22k - 1M WK73R2A 200V 400V 1.0W1 –– 125°C ±100 –– 10 - 20k 10 - 20k 0.75W 70°C 125°C ±100 10 - 1M 10 - 1M 10 - 1M WK73R2B 200V 400V 1.0W1 –– 115°C ±100 10 - 9.76k 10 - 9.76k 10 - 9.1k -55°C ±100 — 10 - 430k 10 - 430k to WK73R2H 1.0W 70°C 125°C ±200 — 432k - 1M 470k - 1M 200V 400V +155°C ±100 — 10 - 510k 10 - 510k WK73R2J 1.0W 70°C 100°C 200V 400V ±200 — 511k - 1M 560k - 1M ±100 — 10 - 330k 10 - 330k 1.5W 70°C 125°C ±200 — 332k - 1M 360k - 1M WK73R3A 200V 400V ±100 — 10 - 330k 10 - 330k 2.0W1 –– 115°C ±200 — 332k - 1M 360k - 1M Rated voltage = √Power rating x resistance value or max. working voltage, whichever is lower 1 If you want to use at rated power use derating curves based on the terminal part temperature on the right side graph located on previous page. If any questions arise whether to use the “Rated Ambient Temperature” or the “Rated Terminal Part Temperature”, please give priority to the “Rated Terminal Part Temperature.” For more details refer to the “Introduction of the derating curves based on the terminal part temperature” in the beginning of the catalog environmental applications Temperature Rise One-Pulse Limiting Electric Power WK73R 1E-1J WK73R 2A-2B WK73R 1E-2A WK73R 2B-3A Temperature Rise (°C)142086000000 10 20 30 40Pow5e0r Ra6t0ing7 0 80 90 1001111JEJE Temperature Rise (°C)111486420200000000 10 20 30 40Pow5e0r Ra6t0ing7 0 80 90 1002222ABAB One-Pulse Limiting Electric Power (W) 01 0.001 . 10101 .001 .01 .1 1 10 100 1002110AJE One-Pulse Limiting Electric Power (W) 1011001000.001 .01 .1 1 10 100 100322(2(130AHBB0.6 /-2k3J-.13MkΩΩ)) (%) (%) Pulse Duration WK73R 2H-3A (ms) uRtpshienneerdcg veceaaor r tdlnohuidueneir g tt oieom tfmnh etsehpa eaeste unrtamerditmn upbgrepoe reca ariorsta dun tm rudfeoriet erirao iusvsneasuse,rr.ieeds Temperature Rise (°C)11148642020000000 3232HHAA//22JJ MRPCCoueo Bafmos: iuFl trtReehmm-ic4pket nen= ert a 1 sc t s.ou6:nr me3①d:5m i t:2µi o H5mn°oC t s pot② :Terminal Tvcaeoosqhlnsuetauti ipmgnremeuad.oex Puvnimsatle lwuuaamephsspee a,ln iaeps ysdopok lipb ucuuea sul bs ssaleueeb.r eovtTho uhtelotet ma t hcgp.heeue lrsicesek s e ietsqhntueada nuplc rrteaoo nd ctcuhhecea t rvsmaa oclautnexe .ras iosc atvtiucreea ro llonfaodt 0 10 20 30 40 50 60 70 80 90 100 Power Rating (%) Performance Characteristics Requirement ∆ R ±(%+0.005Ω) Parameter Limit Typical Test Method Within specified Resistance — 25°C tolerance Within specified T.C.R. — +25°C/-55°C and +25°C/+125°C T.C.R. WK73R1E (0.33W), WK73R1J (0.5W), WK73R2A (0.75W, 1W)WK73R3A (2W): Rated Overload (Short time) ±2% ±0.2% voltage x2.0 for 5 seconds. WK73R2B, R2H, R2J, R3A: Rated voltage x2.5 for 3 seconds Resistance to Solder Heat ±1% ±0.2% 260°C ± 5°C, 10 seconds ± 1 second Bending Test ±1% ±0.1% Holding point 90mm, Bending 1 time, Bending 5mm Rapid Change of Temperature ±0.5% ±0.3% -55°C (30 minutes), +125°C (30 minutes), 100 cycles ±3%: 1E ±1%: 1E Moisture Resistance 40°C ± 2°C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle ±2%: All others ±0.2%: All others ±3%: 1E ±1%: 1E Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle ±2%: All others ±0.2%: All others High Temperature Exposure ±1% ±0.2% +155°C, 1000 hours 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. 11/12/19 32 KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com

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