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ABB ef45-45 electronic overload relay 15a – 45a
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.
£150.84
Why Choose the ABB EF45-45 Electronic Overload Relay?
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.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 15-45 A for flexible motor protection.
- Selectable Trip Class 10E, 20E and 30E.
- Protects against motor overload and phase failure.
- Self-powered design requiring no external control supply.
- Direct mounting onto compatible ABB AF contactors.
Key Features
- ABB EF45 electronic overload relay series.
- Current adjustment: 15-45 A.
- Rated operational current: 45 A.
- Selectable Trip Classes 10E / 20E / 30E.
- 1 NO + 1 NC auxiliary contacts.
- Automatic or manual reset selection.
- Integrated STOP, TEST and trip indication.
- Direct contactor mounting with screw terminals.
Reliable Motor Protection for Industrial Applications
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.
Typical Applications
- Industrial motor starters and control panels.
- Pumps and compressor systems.
- Conveyors and material handling equipment.
- HVAC and ventilation systems.
- Packaging and manufacturing machinery.
- Industrial automation and process control systems.
Technical Specifications
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| Mounting Type | Direct mount on contactor | |
|---|---|---|
| Device Type | Electronic Overload Relay | |
| Current Range | 15–45 A | |
| Compatible With | AF26–AF38 | |
| Trip Class | Adjustable (5–30) | |
| Reset Type | Manual / Automatic | |
| Current | 45 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| 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 |
Frequently Asked Questions
What is the ABB EF45-45 used for?
The EF45-45 protects three-phase electric motors against overload, phase failure and overheating in industrial motor control applications.
What current range does this overload relay support?
The relay provides an adjustable protection range from 15 A to 45 A.
Does the EF45-45 require an external power supply?
No. The relay is self-powered and does not require an additional external control supply.
Which trip classes are available?
The relay offers selectable Trip Class 10E, 20E and 30E to suit different motor starting characteristics.
Which contactors is this relay compatible with?
The EF45-45 is designed for direct mounting onto compatible ABB AF26, AF30 and AF38 contactors.
Trusted by Industrial Control Professionals
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.
