USR4-T220B

厂商：
WILLOW
封装：
描述：
USR4-T220B - Highest Stability Near Temperature Independent - Willow Technologies Ltd

数据手册：

下载USR4-T220B.pdf

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数据手册
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USR4-T220B 数据手册

USR UNR 4-T220 4-T220B 4-T221 USS UNS 4-T220 • Near Temperature Independent • Lowest Tolerances • Low Capacitance and Inductance • High Power • Available also 2-pin version SPECIFICATIONS ELEKTRICAL Resistance range Nominal power : : • Highest Stability USR 4-T220 0R2...80R UNR 4-T220 note1) 0R2...80R Thermal Resistance Rthj-c : Tolerances : from 0R5 : from 10R : from 50R : Stability : Temperature coefficient : 1.5 W (70°C) without heatsink 10 W* 15 W* * with heatsink 10.8 K/W 6.8 K/W 0.1%, 0.25%, 0.5%, 1% 0.05%, 0.1%, 0.25%, 0.5%, 1% 0.01%, 0.02%, 0.05%, 0.1%, 0.25%, 0.5%, 1% 0.01% max. ±5 ppm/K (-55...155)°C typ. ±3 ppm/K (-55...125)°C upon request ±1 ppm/K (0...60)°C 1 kVDC < 1 µV/K Voltage Proof Thermal EMF : : ENVIRONMENTAL Operating Temperature Range : -55°C...155°C MECHANICAL Resistor Material : NiCr-Foil AlN Substrate : Al2O3 Housing : Epoxy + heatsink Cu nickel plated Connector Material : Cu, tinned, 4-pin Max. torque backplate : 1.0 Nm note1): Specially designed for applications with fast changing electrical load. TEMPERATURE COEFFICIENT 600 400 -5 ppm/K 200 0 +2,2 ppm/K -200 -400 - 600 -50 -25 0 25 50 Tem perature (°C) 75 100 125 +5 ppm/K dR/R (ppm ) No minal-Spread -1,8 ppm/K +/-2,3 ppm/K No minal-dR/R No minal-Spread +/-2,3 ppm/K Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail sales@willow.co.uk web www.willow.co.uk USR UNR USS UNS DERATING CURVE Power ( % from nominal power) 4-T220 4-T220B 4-T221 4-T220 120 100 80 60 40 20 0 25 50 85 100 115 130 145 155 Temperature of the backplate (°C) DIMENSIONS USR 4-T220 UNR 4-T220 Housing for special demands and small quantities USR 4-T220B / UNR 4-T220B USR 4-T221 / UNR 4-T221 USS 4-T220 / UNS 4-T220 Dimensions in mm HOW TO ORDER USR 4-T220 0R5 D 0.25% TK5 UNR 4-T220B 50R D 0.1% TK1 Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, UK Tel. + 44 (0) 1342 835234, Fax. + 44 (0) 1342 834306, e-mail sales@willow.co.uk web www.willow.co.uk

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USR4-T220B

1. 物料型号： - USR 4-T220 - UNR 4-T220 - USR 4-T220B - UNR 4-T220B - USR 4-T221 - UNR 4-T221 - USS 4-T220 - UNS 4-T220

2. 器件简介： - 这些电阻器具有高稳定性、接近温度独立性、最低公差、低电容和电感、高功率等特点，并且提供2针版本。

3. 引脚分配： - 4针版本：Cu, tinned, 4-pin - 特别为快速变化的电气负载应用设计。

4. 参数特性： - 电阻范围：0R2..80R - 标称功率：1.5 W(70°C) 无散热器，带散热器时为10W或15W - 热阻Rthj-c：USR 4-T220为10.8 K/W，UNR 4-T220为6.8 K/W - 公差：从0R5起有0.1%, 0.25%, 0.5%, 1%等选项 - 温度系数：0.01% max. ±5 ppm/K (-55...155)°C，典型+3 ppm/K (-55...125)°C - 耐压：1 kVDC - 热电动势：<1V/K

5. 功能详解： - 电阻器适用于高稳定性和快速变化电气负载的应用场合。

6. 应用信息： - 适用于需要高稳定性和快速变化电气负载的应用。

7. 封装信息： - 封装材料：NiCr-Foil为电阻材料，A12O和AIN为基板材料，环氧树脂加散热器Cu镍镀为外壳材料。 - 最大扭矩回转板：1.0 Nm。

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