ABB EF19-0.32 Electronic Overload Relay

ABB EF19-0.32 Electronic Overload Relay is a self-supplied, three‑pole electronic overload protection device for three‑phase motors in low‑voltage control circuits, designed to pair with ABB AF09 contactors to guard against motor overload without needing an external power supply. The setting range per pole is 0.1 to 0.32 A, with a per‑pole resistance of 447 mΩ and power loss of 0.004 W at the lower setting rising to 0.046 W at the upper setting, enabling precise protection with minimal energy waste. Short‑circuit coordination is specified with a 1 A, Type gG fuse, and the unit belongs to ABB’s EF19 family of electronic overload relays, which provide current‑based protection for three‑phase motors. By monitoring motor current and tripping when the set value is exceeded, it helps prevent winding damage and excessive wear in start circuits, making it a common choice for motor protection in ABB AF09 starter configurations and other low‑voltage motor applications.