ABB EF19-18.9 Overload Relay

The ABB EF19-18.9 Electronic Overload Relay is a self-supplied device in ABB’s EF19 family that provides motor protection by monitoring the current of a three-pole motor starter and tripping the contactor when an overload condition is detected, with no external supply required for its operation. This variant is rated for a continuous current range of 5.7 to 18.9 A and offers trip classes 10E and 20E, enabling precise thermal protection aligned with the motor’s running and startup characteristics. As part of ABB’s low-voltage control products, EF19 electronic overload relays are designed for use with ABB contactors to deliver integrated overload protection in motor-starting assemblies; the EF19-18.9 is listed in ABB catalogs and appears in distributor product pages such as 1SAX121001R1104. Typical applications include protection of industrial motors in conveyors, pumps, fans, and processing lines where reliable, self-contained overload protection is required.