High Power Low Resistance Chip Resistors Model No. Size Code INCH Size Code mm WLCR32 WLCR50 WLCR64 1206 2010 2512 3216 5025 6432 ■ Features ・High power type, milliohm resistor product. Low resistance range covers from 10mΩ. ・Wide terminal made higher reliability of solder joint, compared to conventional chip resistor. ・Wide terminal made possible high power handling. (Rated power, WLCR64: 2W, WLCR50: 1W, WLCR32: 0.5W) ・High joint-strength against heat shock. ■ Applications ・Automotive electronics such as E.C.U., etc. ・Circuits requiring high resistance to vibration ・For current detection ■ Model Designation WLCR32 R10 ①Model No. ②Resistance ①Model No. WLCR32 WLCR50 WLCR64 J ②Resistance 3 or 4 digit (Less than 100mΩ: all 4 digit (Example) 10mΩ 470mΩ 102mΩ → → → V ③Tolerance ③Tolerance Symbol Tolerance(%) F ± 1.0 J ± 5.0 ④Packaging Symbol B V E R010 R47 R102 ④Pckging Packaging Bulk Paper taping (WLCR32) Embossed taping (WLCR50,WLCR64) ■ Rating Model No. Rated Wattage (W) WLCR32 0.5 Tolerance (%) J: ±5% F: ±1% WLCR50 1.0 J: ±5% F: ±1% WLCR64 2.0 J: ±5% F: ±1% Resistance (mΩ) 10～33 36～91 100～910 100～976 10～33 36～91 100～910 100～976 10～33 36～91 100～910 100～976 T.C.R. (ppm/ ℃) ±500 ±350 ±200 ±200 ±500 ±350 ±200 ±200 ±500 ±350 ±200 ±200 Max. Working Voltage (V) Max. Overload Voltage (V) 200 400 200 400 200 400 Operating Temperature Range : -55℃～＋155℃ HOKURIKU Specifications are subject to change without notice . 1 High Power Low Resistance Chip Resistors ■ Dimensions Unit : mm L c d W t ■ Structure ③ ④ ⑤ ② ⑥ ① Symbol ① ② ③ ④ ⑤ ⑥ Model No. L W c d WLCR32 3.20±0.15 1.60±0.15 0.30±0.20 0.50±0.20 WLCR50 WLCR64 5.00±0.20 6.30±0.20 2.50±0.20 3.20±0.20 0.50±0.20 0.50±0.20 0.60±0.20 0.90±0.20 t 0.55 ＋0.15/-0.05 0.56±0.15 0.56±0.15 Material List Ceramic Substrate Conductor Resistor Over coat Marking Side Electrode ■ Surface Temperature For resistors operated in ambient temperature above70 ℃, power rating must be derated in accordance with the Power rating (%) 100 derating curve. 80 60 40 20 0 -55℃ 0℃ 70℃ 155℃ Ambient Temperature(℃) ■ Surface Temperature Condition : Measured by soldering on glass cloth base material epoxy resin (t=1.6mm). Surface temperature (℃) Surface temperature rise is shown in this figure. WLCR50 WLCR64 150 WLCR32 100 50 0 50 100 200 300 Power rating (%) ■ Packaging Refer "Dimension, Packaging, etc." HOKURIKU Specifications are subject to change without notice 2