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ABB ef65-70 electronic overload relay 25a – 70a
ABB EF65-70 electronic overload relay with adjustable 25-70 A setting range, selectable trip classes and integrated phase failure protection for industrial motor control applications.
£166.39
Why Choose the ABB EF65-70 Electronic Overload Relay?
The ABB EF65-70 Electronic Overload Relay (Part Number: 1SAX331001R1101) is a robust electronic motor overload protection relay engineered to provide accurate protection for three-phase motors against overload, phase failure and overheating. As part of the advanced ABB EF65 electronic overload relay series, it combines high accuracy, flexible adjustment and dependable performance for demanding industrial motor control applications.
Unlike conventional thermal overload relays, the EF65-70 uses advanced electronic sensing technology to provide precise motor protection over a wide operating temperature range. The relay is self-powered, eliminating the need for an external control supply, while selectable trip classes allow it to be matched to different motor starting characteristics. It mounts directly onto compatible ABB AF contactors for quick and straightforward installation.
With an adjustable current setting range of 25-70 A, integrated auxiliary contacts and rugged industrial construction, the EF65-70 is ideally suited for protecting larger motors used in conveyors, pumps, compressors, HVAC systems, manufacturing machinery and industrial automation equipment.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 25-70 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 EF65 electronic overload relay series.
- Current adjustment: 25-70 A.
- Rated operational current: 70 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 EF65 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 | AF40–AF65 | |
|---|---|---|
| Current Range | 25–70 A | |
| Mounting Type | Direct mount on contactor | |
| Trip Class | Adjustable (5–30) | |
| Reset Type | Manual / Automatic | |
| Device Type | Electronic Overload Relay | |
| Current | 70 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Series | EF65 | |
| Part number | 1SAX331001R1101 | |
| Product type | Electronic overload relay | |
| Current setting range | 25–70 A | |
| Rated operational current | 70 A | |
| Trip classes | 10E / 20E / 30E selectable | |
| Rated operational voltage | Up to 1000 V AC | |
| Rated insulation voltage | 1000 V | |
| Number of poles | 3P | |
| Auxiliary contacts | 1 NC + 1 NO | |
| Connection type | Screw terminals | |
| Degree of protection | IP20 housing / IP10 terminals | |
| Mounting type | Direct attachment to contactor | |
| Voltage type | Self-powered | |
| Frequency | 50 / 60 Hz | |
| Operating temperature | approx. -25 °C to +70 °C | |
| Standards | IEC/EN 60947-4-1 | |
| Dimensions (W × H × D) | approx. 70 × 131.2 × 105.2 mm | |
| Weight | approx. 0.821 kg |
Frequently Asked Questions
What is the ABB EF65-70 used for?
The EF65-70 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 25 A to 70 A.
Does the EF65-70 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 offers selectable Trip Class 10E, 20E and 30E to suit different motor starting characteristics.
Which contactors is this relay compatible with?
The EF65-70 is designed for direct mounting onto compatible ABB AF40, AF52 and AF65 contactors.
Trusted by Industrial Control Professionals
ABB EF65 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 demanding industrial applications.
