Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1SDA054684R1 ABB MA 125-1750 T4 4-Pole Magnetic Trip Unit
ABB 1SDA054684R1 is a 125 A four-pole MA magnetic-only trip unit with an adjustable 750-1750 A instantaneous short-circuit threshold for compatible ABB SACE Tmax T4 circuit breaker assemblies.
£329.15
Why Choose the ABB 1SDA054684R1 MA 125-1750 Magnetic Trip Unit?
The ABB 1SDA054684R1 is an MA magnetic-only trip unit designed for compatible ABB SACE Tmax T4 moulded case circuit breakers. Rated at 125 A, this four-pole protection release provides instantaneous magnetic short-circuit protection for applications where overload protection is provided separately.
The MA release features an adjustable instantaneous magnetic trip threshold (I3) of 750...1750 A. This corresponds to approximately six to fourteen times the 125 A rated current, allowing the short-circuit protection threshold to be selected according to the characteristics of the protected circuit.
Designed for the ABB SACE Tmax T4 platform, the 1SDA054684R1 has a four-pole configuration and is specified for AC and DC applications. It is supplied as a magnetic protection release for integration with compatible Tmax T4 breaker hardware and is therefore a circuit breaker component rather than a complete standalone MCCB.
Key Advantages
- Genuine ABB MA magnetic trip unit.
- 125 A rated current for compatible ABB Tmax T4 circuit breakers.
- Adjustable instantaneous magnetic trip threshold of 750...1750 A.
- Magnetic adjustment range equivalent to approximately 6...14 × In.
- Provides rapid protection against high short-circuit currents.
- Magnetic-only design suits applications where overload protection is provided separately.
- Suitable for compatible AC and DC circuit breaker applications.
- Four-pole configuration for compatible Tmax T4 assemblies.
Key Features
- ABB MA magnetic-only protection release.
- 125 A rated current (Iu).
- Four-pole configuration.
- Instantaneous magnetic short-circuit protection.
- 750...1750 A adjustable instantaneous magnetic threshold (I3).
- Magnetic adjustment range of approximately 6...14 × In.
- Suitable for AC-DC applications.
- Designed for compatible ABB SACE Tmax T4 MCCB hardware.
- No integral thermal overload protection.
- Suitable for circuits using separate overload protection where required.
Adjustable Magnetic Short-Circuit Protection for ABB Tmax T4
Unlike a thermomagnetic TMA release, the MA release is magnetic only. It responds rapidly when current reaches the selected instantaneous short-circuit threshold rather than providing time-dependent thermal overload protection. On the 1SDA054684R1, the I3 threshold can be adjusted from 750 A to 1750 A, corresponding to approximately six to fourteen times the 125 A rated current.
This protection characteristic makes the MA release particularly suitable for circuits where overload protection is handled by another suitable device, including motor applications using dedicated overload protection. Because the 1SDA054684R1 is a protection release rather than a complete MCCB, the final assembly's voltage ratings and short-circuit breaking capacity depend on the compatible ABB Tmax T4 breaker body with which it is combined.
Typical Applications
- ABB Tmax T4 moulded case circuit breaker assemblies.
- Motor circuit short-circuit protection.
- Circuits using separate overload protection devices.
- Industrial machinery and motor control systems.
- Industrial low-voltage electrical distribution systems.
- Four-pole electrical distribution applications.
- Compatible AC and DC circuits requiring magnetic protection.
- OEM switchgear and electrical control panel assemblies.
Technical Specifications
| Series | SACE Tmax T4 |
|---|---|
| Product group | 310511-T-Max T4 - T8 |
| Order code | 1SDA054684R1 |
| EAN | 8015644557980 |
| Product type | Magnetic-only trip unit / protection release |
| Release type | MA |
| Rated current (Iu) | 125 A |
| Instantaneous magnetic trip setting (I3) | 750...1750 A |
| Magnetic setting range | approximately 6...14 × In |
| Protection function | Instantaneous magnetic short-circuit protection |
| Thermal overload protection | No |
| Number of poles | 4 |
| Application | AC-DC |
| Suitable for | ABB SACE Tmax T4 |
| Country of origin | Italy |
| Product net weight | 1.1 kg |
| Customs tariff number | 85389099 |
Frequently Asked Questions
What is the ABB 1SDA054684R1?
The ABB 1SDA054684R1 is an MA magnetic-only trip unit rated at 125 A, with a four-pole configuration for compatible ABB SACE Tmax T4 circuit breaker assemblies.
What protection does the ABB MA 125-1750 trip unit provide?
The MA 125-1750 provides instantaneous magnetic short-circuit protection. It does not incorporate thermal overload protection, so appropriate separate overload protection should be provided where required by the application.
What is the magnetic trip setting range of the ABB 1SDA054684R1?
The instantaneous magnetic trip threshold (I3) is adjustable from 750 A to 1750 A, equivalent to approximately six to fourteen times the release's 125 A rated current.
Can the ABB 1SDA054684R1 be used for AC and DC applications?
Yes. The ABB MA 125-1750 T4 4p is specified as a four-pole AC-DC magnetic release for compatible ABB SACE Tmax T4 circuit breaker assemblies.
Is the ABB 1SDA054684R1 a complete circuit breaker?
No. The 1SDA054684R1 is a magnetic protection release rather than a complete circuit breaker. It must be combined with compatible ABB Tmax T4 breaker hardware to form the required MCCB assembly.
Trusted Magnetic Circuit Protection from ABB
ABB SACE Tmax MA releases provide dedicated instantaneous magnetic protection for applications requiring rapid short-circuit response, combining adjustable protection characteristics with modular integration into compatible Tmax circuit breaker assemblies.
