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1SDA075714R1 ABB TMA 250 1250–2500 3P XT4 Trip Unit
ABB 1SDA075714R1 is a 250 A three-pole TMA thermomagnetic trip unit for SACE Tmax XT4 circuit breakers with adjustable 175–250 A thermal overload and 1250–2500 A instantaneous short-circuit protection.
£470.62
Why Choose the ABB TMA 250 1250–2500 3P XT4 Trip Unit?
The ABB TMA 250 1250–2500 3P XT4, order code 1SDA075714R1, is a three-pole thermomagnetic trip unit designed for compatible ABB SACE Tmax XT4 moulded case circuit breakers. As part of the ABB SACE Tmax XT platform, it provides adjustable thermal overload and magnetic short-circuit protection for low-voltage electrical distribution applications.
The trip unit has a 250 A rated current with adjustable thermal overload protection from 175–250 A. Its instantaneous magnetic protection is adjustable from 1250–2500 A, corresponding to five to ten times the rated current and allowing the protection characteristics to be coordinated with the requirements of the protected circuit.
Designed specifically for the ABB XT4 250 frame, the 1SDA075714R1 is supplied in a three-pole fixed/front configuration for UL/CSA applications. It provides a practical protection solution for compatible XT4 circuit breakers used in switchboards, distribution panels, industrial machinery and other low-voltage power-distribution systems.
Key Advantages
- Purpose-designed TMA thermomagnetic trip unit for ABB XT4 circuit breakers.
- 250 A rated current matching the XT4 250 A frame.
- Adjustable 175–250 A thermal overload protection.
- Adjustable 1250–2500 A instantaneous magnetic protection.
- Combines overload and short-circuit protection without requiring an electronic trip unit.
- Three-pole configuration for compatible XT4 three-pole circuit breakers.
- Designed for the ABB SACE Tmax XT4 250 frame.
- UL/CSA-oriented configuration for low-voltage electrical distribution applications.
Key Features
- ABB SACE Tmax XT series.
- XT4 frame compatibility.
- TMA thermomagnetic protection technology.
- 250 A rated current.
- 175–250 A adjustable thermal setting.
- 1250–2500 A adjustable magnetic setting.
- Three-pole configuration.
- Fixed/front configuration for compatible XT4 circuit breakers.
- Independent thermal overload and instantaneous magnetic protection functions.
- UL/CSA application configuration.
Reliable Thermomagnetic Protection for XT4 Circuit Breakers
Thermomagnetic trip units combine two complementary protection principles. The thermal element responds to sustained overcurrents to provide overload protection, while the magnetic element responds rapidly to high fault currents to provide instantaneous short-circuit protection.
The ABB TMA design provides adjustability for both protection functions. On this 250 A version, the thermal threshold can be set between 175–250 A, while the instantaneous magnetic threshold can be adjusted between 1250–2500 A, providing flexibility when coordinating a compatible XT4 circuit breaker with the protected circuit.
Typical Applications
- ABB SACE Tmax XT4 circuit breaker configurations.
- Industrial low-voltage distribution boards.
- Commercial electrical distribution systems.
- Feeder and cable protection.
- Electrical switchboards and panel assemblies.
- Industrial machinery power circuits.
- Manufacturing and process installations.
- UL/CSA-oriented electrical distribution equipment.
Technical Specifications
| Series | SACE Tmax XT |
|---|---|
| ABB order code | 1SDA075714R1 |
| Product type | Thermomagnetic trip unit |
| Compatible frame | XT4 |
| Frame rating | 250 A |
| Trip unit type | TMA |
| Rated current | 250 A |
| Thermal overload setting | 175–250 A |
| Thermal setting range | 0.7–1 × In |
| Instantaneous magnetic setting | 1250–2500 A |
| Magnetic setting range | 5–10 × In |
| Number of poles | 3 |
| Configuration | Fixed / front |
| Application | Distribution protection |
| Standards/application | UL/CSA |
Frequently Asked Questions
What is the ABB 1SDA075714R1 used for?
The ABB 1SDA075714R1 is a TMA thermomagnetic trip unit designed for compatible three-pole ABB SACE Tmax XT4 circuit breakers, providing adjustable overload and instantaneous short-circuit protection.
What is the rated current of the ABB TMA 1SDA075714R1?
The trip unit has a rated current of 250 A and is designed for the ABB XT4 250 A frame.
What is the thermal overload adjustment range?
The thermal overload protection is adjustable from 175–250 A, corresponding to 0.7–1 times the 250 A rated current.
What is the instantaneous short-circuit setting?
The instantaneous magnetic protection is adjustable from 1250–2500 A, corresponding to five to ten times the rated current.
Which ABB circuit breaker frame is this trip unit designed for?
The 1SDA075714R1 is designed for compatible ABB SACE Tmax XT4 three-pole circuit breakers within the 250 A frame platform.
Trusted by Electrical Professionals Worldwide
ABB SACE Tmax XT protection components are widely used in industrial and commercial electrical systems to provide dependable overload and short-circuit protection with flexible integration into modern low-voltage distribution equipment.
