PWR221T-30-1R00J is a TO-220 style power resistor manufactured by Bourns using thick film on alumina ceramic technology, designed for current limiting, capacitor discharge, and current measurement circuits in power supplies for telecom and industrial applications. The resistor features a 1 O resistance value with ±5% tolerance, 30 W power rating at 25°C case temperature, and low inductance of 0.1 µH maximum, along with a thermal resistance of 4.2°C/W. It operates across a wide temperature range from -55°C to +150°C with a maximum operating voltage of 250 V, and exhibits excellent reliability characteristics including AEC-Q200 compliance and RoHS compliance. This automotive-grade component is ideal for power supplies, motor drives, test and measurement equipment, and rectifier applications where robust performance and thermal stability are required.