ABB EF45-30 Electronic Overload Relay

ABB EF45-30 Electronic Overload Relay (model 1SAX221001R1101) is a standalone motor-protection device designed to pair with ABB motor starters. It belongs to the EF45 family of electronic overload relays and is listed as suitable for use with ABB AF26 contactors, enabling compact, integrated motor starter assemblies. This 30-amp variant provides current protection across a 9.0 to 30 A range, with an adjustable trip class that lets you tailor the protection characteristic to the motor’s service duty. The relay monitors running current to interrupt the circuit if an overload is detected, helping prevent motor winding damage and overheating. The product code 1SAX221001R1101 identifies the EF45-30 variant and aligns with ABB’s broader low-voltage motor protection portfolio, making it a common choice for control panels and motor control centers in light- to medium-duty industrial applications.