The Square D QOB3501021 Miniature Circuit Breaker is a high-quality electrical component designed for industrial and commercial applications. With a current rating of 41-50 A and three poles, this bolt-on circuit breaker provides instantaneous break time for safe and efficient power distribution. The shunt trip feature adds an extra layer of protection, making it a reliable choice for electrical systems operating at 120/240 Vac or 48 VDC. Built by the trusted brand Square D, this circuit breaker is a durable and dependable solution for your electrical needs.