Vishay Intertechnology, Inc., manufacturers of discrete semiconductors and passive electronic components used in virtually all types of electronic devices and equipment markets, including industrial, automotive, aerospace, power supplies and medical sectors, recently introduced a new series of high-power, high-current grid resistors. Offering designers a convenient drop-in replacement for competing solutions, Vishay Milwaukee GRE2 devices, a product line of Vishay Dale Resistors, combine high power ratings to 24 kW and high operating temperatures to +400 °C with a robust design.
Featuring a stainless steel plate element, ceramic insulators, and multiple taps, the GRE2 series provides high reliability with a welded construction and double insulation for maximum cooling efficiency. Offered in modular or custom designs, the RoHS-compliant industrial power resistors can be mounted in IP20 (indoor rated) and IP23 (outdoor rated) enclosures to offer the optimized level of protection for the application.
With high power capability from 4 kW to 24 kW at +40 °C, the grid resistors are optimized for capacitor pre-charge and discharge, dynamic braking, load testing, heater, and neutral grounding applications in locomotives / transit, harmonic filters, renewable energy systems, and industrial systems. The devices feature a wide resistance range from 0.25 Ω to 50 Ω, with tolerance of ± 10 %, and low inductance from 10 µH to 40 µH.