ABB 1SAX611001R1101 EF370-380 is a self-supplied three-pole electronic overload relay with a 115–380 A setting range and selectable 10E, 20E and 30E trip classes for industrial motor protection.
£685.42
The ABB 1SAX611001R1101 (EF370-380) is a high-performance electronic overload relay designed to provide reliable motor protection against overload and phase failure in demanding industrial applications. As part of the ABB EF electronic overload relay series, it combines a wide adjustable current range with accurate electronic protection and straightforward integration with ABB contactors.
The EF370-380 is a self-supplied electronic overload relay, meaning that no additional external supply is required for its protection electronics. It provides selectable trip classes 10E, 20E and 30E, temperature compensation, trip indication, STOP and test functions, and selectable automatic or manual reset, giving engineers flexibility when configuring motor protection for different starting and operating conditions.
With an adjustable setting range of 115–380 A and a rated operational current of 380 A, the EF370-380 is designed for high-current industrial motors. It can be connected directly to compatible ABB contactors including AF210, AF260, AF265, AF300, AF305 and AF370 models, providing a compact motor starter and protection solution.
Electronic overload relays such as the ABB EF370-380 continuously monitor the current supplied to an industrial motor and disconnect the control circuit when an overload or phase failure condition threatens the motor. Electronic measurement provides accurate protection across a wide current range while helping prevent overheating, insulation damage and costly motor failures.
The EF370-380 provides selectable trip classes 10E, 20E and 30E, allowing its response characteristics to be matched to motors with different starting times and load conditions. Integrated temperature compensation, test and STOP functions, trip indication and selectable reset operation make the relay particularly suitable for sophisticated motor starters and automated industrial installations.
| Manufacturer | ABB |
|---|---|
| Series | EF Electronic Overload Relays |
| Model | EF370-380 |
| Order code | 1SAX611001R1101 |
| Product type | Electronic overload relay |
| Setting range | 115–380 A |
| Rated operational current | 380 A |
| Number of poles | 3 |
| Protected poles | 3 |
| Trip classes | 10E, 20E, 30E selectable |
| Auxiliary contacts | 1 NO + 1 NC |
| Rated insulation voltage | 1000 V |
| Main circuit rated operational voltage | 1000 V AC |
| Auxiliary circuit rated operational voltage | 600 V AC/DC |
| Rated impulse withstand voltage, main circuit | 8 kV |
| Rated impulse withstand voltage, auxiliary circuit | 6 kV |
| Rated frequency | 50 / 60 Hz |
| Housing protection rating | IP20 |
| Main circuit terminal protection | IP00 |
| Pollution degree | 3 |
| Reset | Automatic or manual selectable |
| Mounting type | Direct contactor mounting |
| Compatible contactors | A210, A260, A300, AF210, AF260, AF265, AF300, AF305, AF370 |
| Operating temperature | -25 to +70 °C |
| Storage temperature | -50 to +85 °C |
| Maximum operating altitude | 2000 m |
| Standards | IEC/EN 60947-1, IEC/EN 60947-4-1, IEC/EN 60947-5-1 |
| Dimensions (H × W × D) | 187.6 × 105 × 122.8 mm |
| Weight | approx. 1.338 kg |
| EAN / GTIN | 4013614442216 |
The ABB 1SAX611001R1101, also known as the EF370-380, is an electronic overload relay designed to protect industrial motors against overload and phase failure.
The EF370-380 has a wide adjustable motor current setting range of 115–380 A, with a rated operational current of 380 A.
The relay provides selectable trip classes 10E, 20E and 30E, allowing the protection characteristics to be matched to different motor starting and operating requirements.
No. The EF370-380 is a self-supplied electronic overload relay, so an additional external power supply is not required for its electronic motor protection functionality.
The EF370-380 is suitable for direct connection to compatible ABB contactors including A210, A260, A300, AF210, AF260, AF265, AF300, AF305 and AF370 models.
ABB EF electronic overload relays provide accurate and flexible motor protection for demanding industrial installations, combining wide current adjustment ranges, selectable trip characteristics and straightforward integration with ABB contactors and motor control systems.
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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...