Schneider Electric B3.70 Thermal Overload Relay, also listed as Square D B3.70 Overload Relay, is a thermal protection device that interrupts power when overheating is detected in the protected circuit. The B3.70 designation places it within Schneider Electric’s Square D lineup of overload relays, designed for use in electrical control applications. As a thermal overload relay, it relies on heat‑sensitive elements to trip the circuit, safeguarding equipment from excessive heat.
