ABB 1SFA739001R1001 EF1250DU-1250 electronic overload relay with a 375 A to 1250 A adjustable current range designed for high-power industrial motor protection applications.
£1,775.90
The ABB 1SFA739001R1001 is a high-performance electronic overload relay designed to provide reliable motor protection against overload conditions and phase failure in industrial motor control applications. As part of the ABB EF electronic overload relay series, the EF1250DU-1250 is engineered for use with large ABB AF contactors in demanding industrial installations.
This electronic overload relay delivers accurate motor protection with a wide adjustable current range and selectable trip classes. Its self-supplied design eliminates the need for an additional external power supply, while advanced protection functions help improve equipment reliability and reduce downtime in industrial systems.
With an adjustable current setting range of 375 A to 1250 A and a rated operational current of 1250 A, the ABB EF1250DU-1250 is suitable for high-power motor applications including large pumps, fans, compressors and industrial machinery requiring dependable overload protection.
Electronic overload relays such as the ABB EF1250DU-1250 continuously monitor motor operating conditions and provide accurate protection against excessive current and phase loss. This helps prevent motor damage while improving operational safety and system availability.
The EF series is designed for integration with ABB contactors and industrial motor starters. Its adjustable protection settings, selectable trip characteristics and robust construction make it suitable for large-scale automation and power control applications.
| Manufacturer | ABB |
|---|---|
| Series | EF Electronic Overload Relays |
| Model | EF1250DU-1250 |
| Product type | Electronic overload relay |
| Part number | 1SFA739001R1001 |
| Rated operational current | 1250 A |
| Adjustable current range | 375 ... 1250 A |
| Trip classes | 10E, 20E, 30E |
| Suitable contactors | AF1350, AF1650, AF2050 |
| Main circuit rated voltage | up to 1000 V AC |
| Frequency | 50 / 60 Hz |
| Number of poles | 3 |
| Protection against | Motor overload and phase failure |
| Dimensions (H × W × D) | approx. 198 × 350 × 425 mm |
| Weight | approx. 10 kg |
The ABB 1SFA739001R1001 is an electronic overload relay used to protect industrial motors against overload conditions and phase failure.
The relay supports an adjustable current setting range from 375 A to 1250 A.
The EF1250DU-1250 is designed for use with ABB AF1350, AF1650 and AF2050 contactors.
No, the EF1250DU-1250 uses a self-supplied design and does not require an additional external supply.
The relay provides selectable trip classes including 10E, 20E and 30E for different motor protection requirements.
ABB EF electronic overload relays are widely used in industrial motor control systems to provide dependable protection, accurate monitoring and reliable operation in demanding applications.
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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...
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...