ABB EF45-45 electronic overload relay with adjustable 15-45 A setting range, selectable trip classes and integrated phase failure protection for industrial motor control applications.
£232.06
The ABB EF45-45 Electronic Overload Relay (Part Number: 1SAX221001R1102) is a high-performance electronic motor overload protection relay engineered to provide accurate protection for three-phase motors against overload, phase failure and overheating. As part of the trusted ABB EF45 electronic overload relay series, it delivers dependable motor protection while helping maximise equipment reliability and minimise downtime in demanding industrial applications.
Unlike conventional thermal overload relays, the EF45-45 uses advanced electronic sensing technology to deliver precise protection across a wide operating temperature range. The relay is self-powered, requiring no external control supply, and features selectable trip classes to accommodate a variety of motor starting applications. Its direct mounting design enables fast installation onto compatible ABB AF contactors.
With an adjustable current setting range of 15-45 A, integrated auxiliary contacts and robust industrial construction, the EF45-45 is ideally suited for protecting larger motors used in pumps, compressors, conveyors, HVAC equipment, manufacturing machinery and industrial automation systems.
Electronic overload relays continuously monitor motor current and rapidly detect overload or phase loss conditions before damage occurs. This helps reduce downtime, extend motor service life and improve the reliability of industrial machinery operating in demanding environments.
The ABB EF45 series combines high measurement accuracy, temperature compensation and selectable trip characteristics, making it an ideal solution for OEM machine builders, panel manufacturers and industrial maintenance professionals.
| Current | 45 A |
|---|---|
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | EF45 |
| Part number | 1SAX221001R1102 |
| Product type | Electronic overload relay |
| Current setting range | 15–45 A |
| Rated operational current | 45 A |
| Trip classes | 10E / 20E / 30E selectable |
| Rated operational voltage | Main circuit 690 V AC |
| Auxiliary circuit voltage | 600 V AC/DC |
| Number of poles | 3 |
| Auxiliary contacts | 1 NC + 1 NO |
| Degree of protection | IP20 |
| Mounting type | Direct mounting to contactor |
| Terminal type | Screw terminals |
| Suitable for | ABB AF26 to AF38 contactors |
| Frequency | 50 / 60 Hz |
| Operating temperature | approx. -25 °C to +70 °C |
| Standards | IEC/EN 60947-4-1 |
| Dimensions (W × H × D) | approx. 45 × 104.7 × 86 mm |
| Weight | approx. 0.36 kg |
The EF45-45 protects three-phase electric motors against overload, phase failure and overheating in industrial motor control applications.
The relay provides an adjustable protection range from 15 A to 45 A.
No. The relay is self-powered and does not require an additional external control supply.
The relay offers selectable Trip Class 10E, 20E and 30E to suit different motor starting characteristics.
The EF45-45 is designed for direct mounting onto compatible ABB AF26, AF30 and AF38 contactors.
ABB EF45 electronic overload relays are trusted by OEM manufacturers, panel builders and maintenance engineers worldwide for delivering precise motor protection, dependable performance and long service life in demanding industrial environments.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...