High Power Chip Resistors Model No. Size Code INCH Size Code mm WCR32 WCR50 WCR64 1206 2010 2512 3216 5025 6432 Features Wide terminal made higher reliability of solder joint, compared to conventional chip resistor. Wide terminal made possible high power handling. (Rated power, WCR50 : 1W, WCR32 : 0.5W) High joint strengh against heat shock. Resistance ranging 1M. Applications Automotive electronics such as E.C.U. ,etc. Circuits requiring high resistance to vibration. Model Designation WCR32 Model No. Model No. WCR32 WCR50 WCR64 102 J Resistance Tolerance Resistance 3 digit or 4digit (Resistance) 4.7 1k 1.02k (Marking) 0 4R7 102 1021 V Packaging Tolerance Symbol Tolerance(%) F 1.0 J 5.0 0 type is no marking Symbol B V E Packaging Packaging Bulk Paper taping (WCR32) Embossed taping (WCR50,WCR64) Rating Model No. Rated Wattage (W) WCR32 0.5 Tolerance (%) J: 5% F: 1% J: 5% WCR50 1.0 F: 1% J: 5% WCR64 2.0 F: 1% Resistance () 11M 191 1009.1k 10k 1M 11M 191 1009.1k 10k 1M 11M 191 1009.1k 10k 1M T.C.R. (ppm/ ) 200 200 100 200 200 200 100 200 200 200 100 200 Max. Working Voltage (V) Max. Overload Voltage (V) 200 400 200 400 200 400 Operating Tempeature Range : -55155 Type Model No. WCR32, WCR50, WCR64 Rated Current (A) 2.0 Resistance Max. 50m HOKURIKU Specifications are subject to change without notice . 1 High Power Chip Resistors Dimensions L c d W t Model No. L W c d WCR32 3.200.15 1.600.15 0.300.20 0.500.20 WCR50 WCR64 5.000.20 6.300.20 2.500.20 3.200.20 0.500.20 0.500.20 0.600.20 0.900.20 Unit : mm t 0.55 0.15/-0.05 0.560.15 0.560.15 0 Type Symbol Surface Temperature For resistors operated in ambient temperature above70 , power rating must be derated in accordance with the derating curve. Material List Ceramic Substrate Conductor Resistor Over coat Marking Side Electrode Symbol Material List Ceramic Substrate Conductor Over coat Marking Side Electrode 100 Power rating (%) Structure 80 60 40 20 0 -55 0 70 155 Ambient Temperature() Surface Temperature Surface temperature rise is shown in this figure. cloth base material epoxy resin (t=1.6mm). Surface temperature () Condition : Measured by soldering on glass WCR50 WCR64 150 WCR32 100 50 0 50 100 200 300 Power rating (%) Packaging Refer "Dimension, Packaging, etc." HOKURIKU Specifications are subject to change without notice 2