The TE300B2R7J is a wire-wound tubular resistor from the TE series, rated for 300W of power in free air. It is constructed with a mullite-coated ceramic core and features a corrugated ribbon element for rapid cooling and enhanced stability. This resistor offers a resistance range from 1.0Ω to 2.7kΩ with a 5% tolerance and operates within a temperature range of -25°C to +225°C. Its flameproof construction and ability to handle a 3x overload for 5 seconds make it a reliable choice for demanding applications like capacitor charging and discharging, load test simulation, and motor start/stop cycles.