Why Choose the ABB 1SFA739001R1001 EF1250DU-1250 Electronic Overload Relay?
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.
Key Advantages
- Advanced electronic overload protection for industrial motors.
- 375 A to 1250 A adjustable current range for flexible motor protection.
- 1250 A rated operational current for high-power motor applications.
- Self-supplied design requiring no additional external control supply.
- Selectable trip classes 10E, 20E and 30E for application flexibility.
- Reliable protection against motor overload and phase failure.
Key Features
- ABB EF electronic overload relay series.
- EF1250DU-1250 model.
- 375 A to 1250 A adjustable setting range.
- 1250 A rated operational current.
- Compatible with ABB AF1350, AF1650 and AF2050 contactors.
- Selectable trip classes 10E, 20E and 30E.
- Integrated overload and phase failure protection.
- Automatic or manual reset functionality.
Reliable Motor Protection for Industrial Applications
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.
Typical Applications
- Large industrial motor starters.
- Pumps and water treatment systems.
- Fans and ventilation equipment.
- Compressors and heavy machinery.
- Industrial production systems.
- Motor control panels and automation installations.
