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ABB ef45-30 electronic overload relay 9a – 30a
ABB EF45-30 electronic overload relay with adjustable 9.0-30 A setting range, selectable trip classes and integrated phase failure protection for industrial motor control applications.
£124.90
Why Choose the ABB EF45-30 Electronic Overload Relay?
The ABB EF45-30 Electronic Overload Relay (Part Number: 1SAX221001R1101) is a high-performance electronic motor overload protection relay designed to provide accurate protection for three-phase motors against overload, phase failure and overheating. As part of the robust ABB EF45 electronic overload relay series, it delivers reliable motor protection while helping maximise equipment uptime in demanding industrial environments.
Unlike conventional thermal overload relays, the EF45-30 uses advanced electronic sensing technology to provide highly accurate motor protection across a wide operating temperature range. The relay is self-powered, requiring no external control supply, and offers selectable trip classes to accommodate a variety of motor starting characteristics. Direct mounting onto compatible ABB AF contactors enables fast and simple installation.
With an adjustable current setting range of 9.0-30 A, integrated auxiliary contacts and industrial-grade construction, the EF45-30 is ideally suited for protecting larger motors used in pumps, compressors, conveyors, HVAC systems, process equipment and industrial automation applications.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 9.0-30 A.
- 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: 9.0-30 A.
- Rated operational current: 30 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 to detect overload and phase loss conditions before damage occurs. This helps reduce downtime, extend motor service life and improve the reliability of industrial equipment operating in demanding environments.
The ABB EF45 series combines excellent measurement accuracy, temperature compensation and adjustable 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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| Compatible With | AF26–AF38 | |
|---|---|---|
| Mounting Type | Direct mount on contactor | |
| Current Range | 9–30 A | |
| Trip Class | Adjustable (5–30) | |
| Reset Type | Manual / Automatic | |
| Device Type | Electronic Overload Relay | |
| Current | 30 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Series | EF45 | |
| Part number | 1SAX221001R1101 | |
| Product type | Electronic overload relay | |
| Current setting range | 9.0–30 A | |
| Rated operational current | 30 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 AF contactor range | |
| 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 EF45-30 used for?
The EF45-30 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 features an adjustable protection range from 9.0 A to 30 A.
Does the EF45-30 require an external power supply?
No. The relay is self-powered and operates without an additional external control supply.
Which trip classes are available?
The relay provides selectable Trip Class 10E, 20E and 30E to suit different motor starting characteristics.
Which contactors is this relay compatible with?
The EF45-30 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 accurate motor protection, dependable performance and long service life in industrial applications.
