Stackpole Electronics Intros BR Series Resistors

Stackpole Electronics Inc. (SEI, Raleigh, NC) introduced a new flameproof, open-air, current-sense resistor technology suitable for high-current motor control and power regulation applications. Applications for the BR Series include large portable electronics, power supplies, servers, satellite communications, window lift and sunroof motors, wiper controls, power steering systems, and anti-lock braking systems. The BR Series is typically used in current-sense, feedback and surge-protection circuitry.

The BR Series current-sense resistors are capable of withstanding 70 A of current, and are rated from 1 W to 5 W at 85 °C with resistance values from 0.005 Ω to 0.1 Ω and tolerances down to ±1%. They feature TCRs as low as +20 ppm/°C. The operating temperature range is from –40 °C to +125 °C. The BR Series features a resistive element with an off-the-board design that keeps the resistor’s "hot spot" safely off the PC board and allows air to circulate around it, contributing to cooler operation.

Pricing for the BR Series resistors is approximately $0.15 in quantities of 5,000, with delivery times of six to eight weeks. Samples of standard products are available immediately.