3R-250

The 3R-250 is designed as one kind of 250Watt mountable non-inductive, high frequency resistor that can be used in high frequency and pulse load applications. By direct mounting on a heatsink significant cost advantages can be reailzed for power Appliation from 100w to 600w. 3R-250 can be supplied in a 2-terminal Main applications are Variable speed Drives, ship, train, RF Termination, Power Supplies, Control Devices, Telecom, Robotics, Motor Controls Dynamic Braking, and other switching designs.

The specifications of the 3R-250 can be summarized as:(1)Resistance Values: 1R0 to 2Megohm others on rquest; (2)Resistance Tolerance: 10% Std. ,1%,2%,5% available on request.; (3)Temperature Coefficient: +/-100 ppm/ typ. (others upon request); (4)Maximum Working Voltage: 5,000V DC, higher voltage on request, not execeeding max. power; (5)Single Shot Voltage: Up to 12kV at std. wave (1.5/50 us); (6)Insulation Resistance: 10 G min. at 500V; (7)Creeping Distance : 42mm min.; (8)Inductance: </= 50 nH; (9)Capacity/Ground: </= 110 pF; (10)Capacity/Resistive: </= 40 pF; (11)Operation Temperature: -55 to +155 ; (12)Max. Torque for Contacts: 2 N.m; (13)Max. Torque for Mounting: 1.8 N.m; (14)Power Rating: 250W at 50 Tap Temperature; (15)Higher power: 600Watt at 5 Tap Temperature; (16)Dielectric Strength: Up to 12 kV; (17)Termination to Contacts: M5 Screws; (18)Required thermal transfer compound of-heat conductivity: 1 W/; (19)Required flatness of heat sink: </=0.05mm; (20)Roughness of the Heatsink surface: </=6.4 um; (21)Isolation Voltage(Terminal to Heatsink): 7k Vrms.

If you want to know more information such as the electrical characteristics about the 3R-250, please download the datasheet in www.seekic.com or www.chinaicmart.com .