Allen-Bradley 810-A03A

Allen-Bradley 810-A03A is an inverse-time magnetic overload relay from the Bulletin 810 family, designed to be paired with a compatible contactor to protect motors from overload in both AC and DC circuits. In Series A configuration, this device uses a 4 A coil and employs a magnetically operated time-delay mechanism, delivering inverse-time protection that shortens the trip time as current increases. It is rated for use with voltages up to 600 V, whether AC or DC, enabling integration into standard motor starter arrangements that rely on automatic overload protection with a contactor. This 810-A03A accessory supports the traditional motor-protection approach associated with Allen-Bradley 810-series gear, providing a rugged, electro-mechanical solution for safeguarding electrical machines in control panels and legacy installations that utilize Bulletin 810 components.