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24 K O A S peer E lectronics, Inc. • 199 Bolivar D rive • Bradford, PA 16701 • U SA • 814-362-5536 • Fax: 814-362-8883 • w w w.koaspeer.com Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 11/27/14 resistors

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high pow er, w ide term inal type flat chip resistors dim ensions and construction Protecti ve Coating Inner Electrode Resisti ve Film Cerami c Substrate Solder Plating Ni Plating L cc W t d D : ±0.5% F: ±1% J: ±5% T: S n ±1%: 3 significant figures + 1 m ultiplier “R” indicates decim al on value <100 Ω ±5%: 2 significant figures + 1 m ultiplier “R” indicates decim al on values <10 Ω A ll values less than 0.1 Ω (100m Ω) are expressed in m Ω w ith “L” as decim al. E x: 33m Ω, 1% = 33L0 2B: 0.75W 2H: 1W 2J: 1W 3A : 1.5W W K73S W K73R TD : 0612: 7" 4m m pitch punched paper TE : 1020, 1218, 1225: 7" em b ossed plastic TE D : 1020, 1218, 1225: 10" em b ossed plastic For further inform ation on packaging, please refer to A ppendix A WK73S Type Size Nominal Resistance Resistance Tolerance Termination Material Packaging New Part # 2J TE 33L0 FT Type L .030±.006 (0.75±0.15) .024±.004 (0.4±0.2) .018±.008 (0.45±0.2) .252±.006 (6.3±0.15) .122±.006 (3.1±0.15) .181±.006 (4.6±0.15) .122±.006 (3.1±0.15) (1218) (1225) (Inch Size Code) Wcdt Dimensions inches (m m ) .016±.008 (0.4±0.2) .19 7±.006 (5.0±0.15) .09 8±.006 (2.5±0.15) (1020) .018±.006 (0.45±0.15) .012±.008 (0.3±0.2) .126±.006 (3.2±0.2) .063±.006 (1.6±0.15) (0612) ordering inform ation EU Derating Curve % Rated Power 100 -60 -40 0 4 06 08 0 1001 60 Ambient Temperature (°C) -55 120 155 -20 1 40 For resistors operated at an am bient tem perature of 70°C or above, a pow er rating shall be derated in accordance w ith the above derating curve. % Rated Po we r 100 -60 -40 0 4 0 6 0 8 0 100 160 Terminal Part Temperature (°C) -55 120 155 -20 140 105 2B (105°C) For resistors operated term inal tem perature of described for each size or above, a pow er rating shall be derated in accordance w ith the derating curve above. Please refer to “Introduction of the derating curve based on the term inal part tem perature” on the beginning of our catalog before use.

  • W ide-side term ination (reverse-geom etry) type flat chip resistor
  • High reliab ility and perform ance w ith T.C .R. ±100 x 10 -6 /K, resistance tolerance ±1%
  • M arking: Black protective coat
  • Products w ith lead-free term inations m eet E U RoHS requirem ents. E U RoHS regulation is not intended for Pb -glass contained in electrode, resistor elem ent and glass.
  • A E C -Q 200 Q ualified: 0612(2B), 1020(2H), 1218(2J), 1225(3A )

high pow er, w ide term inal type flat chip resistors environm ental applications Maximum Working Voltage F±1% E-24/E-96 J±5% E-24 Part Designation Maximum Overload Voltage Operating Temp. Range Power Rating WK73R2H WK73S2J 220m - 9 .76 432k - 1M 27m - 215m 200V 400V 200V 400V 200V 400V ±100 1.0W 1.0W ±200 ±800 Resistance Range (Ω)T.C.R. (X 10 -6 /K) -55°C to +155°C 10 - 430k ±100 ±800 ±200 WK73R2J WK73S3A WK73R3A 240m - 9 .76 200V 400V Rated Terminal Part Temp. 100°C 105°C 9 0°C 1.5W (2.0W *) 1.5W (2.0W *) ±100 33m - 237m 22m - 32.4m 511k - 1M 10 - 510k 360m - 9 .76 33m - 357m 10 - 330k 332k - 1M 220m - 9 .1 470k - 1M 10m - 24m 27m - 200m 10m - 30m 10 - 430k 240m - 9 .1 33m - 220m 10m - 20m 22m - 30m 560k - 1M 10 - 510k 360m - 9 .1 33m - 330m 10 - 330k 360k - 1M ±200 ±800 ±300 ±100 ±200 ±200 ±100 ±100 ±200 Performance Characteristics Parameter Requirement ∆ R ±(%+0.005 Ω) Limit Typical Test Method Resistance T.C .R. 25°C W ithin specified tolerance W ithin specified T.C .R. O verload (S hort tim e) Rated V oltage x 2.5 for 5 seconds ±2% ±0.2% Resistance to S older Heat 260°C ± 5°C , 10 seconds ± 1 second ±1% ±0.2% Bending Test Holding point 9 0m m , Bending 1 tim e, Bending 5m m ±1% ±0.1% Rapid C hange of Tem perature -55°C (30 m inutes), +155°C (30 m inutes), 5 cycles ±0.5% ±0.1% M oisture Resistance 40°C ± 2°C , 9 0%-9 5% RH, 1000 hours, 1.5 hr O N , 0.5 hr O FF cycle ±2% ±0.2% E ndurance at 70°C 70°C ± 2°C , 1000 hours, 1.5 hr O N , 0.5 hr O FF cycle ±2% ±0.2% High Tem perature E xposure +155°C , 1000 hours ±2%: W K73S (±5%) ±1%: all others ±0.2%: all others WK73S2H 1.0W 1.0W applications and ratings 430m - 9 .76 10 - 1M ±100 ±100 430m - 9 .1 10 - 1M 30m - 422m ±800 ±200 10m - 27m 30m - 39 0m WK73S2B WK73R2B 0.75W (1.0W *) D±0.5% E-24/E-96 10 - 1M A dditional environm ental applications can also b e found at w w w.koaspeer.com 0.75W Rated am b ient tem perature: +70°C Rated voltage = √Pow er rating x resistance value or m ax. w orking voltage, w hichever is low er * Please refer to the “Higher Pow er Ratings” statem ent in the beginning of the catalog. Contact KO A prior to usage. 25 K O A S peer E lectronics, Inc. • 199 Bolivar D rive • Bradford, PA 16701 • U SA • 814-362-5536 • Fax: 814-362-8883 • w w w.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 resistors