Allen-Bradley 815-B0V4 Overload Relay

Allen-Bradley 815-B0V4 Overload Relay is a manual-reset, single-pole protective relay from Rockwell Automation's Allen-Bradley line. It is rated for up to 600 V AC and is designed to interrupt current in a motor control circuit when an overload condition is detected, with a user reset required to restore operation after tripping. The 815‑B0V4 designation identifies this specific overload relay in the 815 family, a device intended to provide discrete overload protection in industrial control panels alongside compatible contactors and wiring. This unit's 600 V AC maximum rating makes it suitable for many standard AC motor applications in commercial and industrial settings, where a simple reset workflow helps maintain panel control and minimize downtime after a fault. In practice, installers select the 815‑B0V4 as part of a protective scheme to guard motors and drive circuits from overheating and electrical faults by opening the circuit on a trip event and requiring intentional reset to reenergize the circuit.