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.
1SDA123211R1 ABB EPX-A1C-025L3 A1N125 25A 1P L3 TMA Moulded Case Circuit Breaker
ABB EPX-A1C-025L3 (1SDA123211R1) is a 25 A single-pole A1N125 moulded case circuit breaker with thermal-magnetic adjustable protection, a 25 kA specified breaking capacity and an L3 configuration for compatible ABB Protecta Power distribution boards.
£194.77
Why Choose the ABB EPX-A1C-025L3 25A Moulded Case Circuit Breaker?
The ABB EPX-A1C-025L3 is a compact and reliable 25 A single-pole moulded case circuit breaker (MCCB) designed to provide effective overload and short-circuit protection in low-voltage electrical distribution systems. Based on the established ABB A1N125 circuit breaker platform, this protective device is specifically configured for the L3 phase position in compatible ABB Protecta Power distribution assemblies.
As part of the ABB Protecta Power Devices product group, the EPX-A1C-025L3 combines dependable circuit protection with a practical design for commercial and industrial electrical installations. Its thermal-magnetic adjustable (TMA) trip mechanism provides protection against sustained overload conditions and short-circuit faults, helping protect electrical cables, connected equipment and distribution infrastructure.
With a rated current of 25 A, a 25 kA breaking capacity in the specified ABB Protecta Power application and a single-pole L3 configuration, the EPX-A1C-025L3 is suitable for outgoing circuit protection in compatible distribution boards. Its LSC connection arrangement supports integration into the appropriate ABB distribution assembly, making it a practical choice for electrical contractors, panel builders and building services engineers.
Key Advantages
- Compact 25 A moulded case circuit breaker designed for low-voltage electrical distribution.
- 25 kA short-circuit breaking capacity in the specified ABB Protecta Power application.
- Single-pole L3 configuration for dedicated phase circuit protection.
- Thermal-magnetic adjustable (TMA) trip unit for overload and short-circuit protection.
- Based on the reliable ABB A1N125 circuit breaker platform.
- Designed for integration into ABB Protecta Power distribution boards.
- Adjustable protection characteristics support electrical circuit coordination.
- Robust moulded case construction provides dependable protection in demanding electrical environments.
Key Features
- ABB Protecta Power Devices product group.
- EPX-A1C-025L3 product designation.
- ABB order code 1SDA123211R1.
- ABB A1N125 circuit breaker platform.
- 25 A rated current for outgoing circuit protection.
- 125 A frame size within the A1N125 platform.
- 25 kA breaking capacity for the specified Protecta Power configuration.
- Single-pole (1P) L3 arrangement.
- LSC connection configuration for compatible distribution assemblies.
- Thermal-magnetic adjustable (TMA) protection.
- Thermal trip adjustment range of 0.7–1 × In.
- Magnetic trip adjustment range of 5–10 × In.
- Designed for installation with the appropriate ABB Protecta Power MCCB base plate and cover.
- Suitable for commercial and industrial low-voltage electrical distribution applications.
Reliable Circuit Protection for Low-Voltage Distribution Systems
Moulded case circuit breakers such as the ABB EPX-A1C-025L3 protect electrical circuits by automatically interrupting current when an overload or short-circuit fault occurs. The thermal protection element responds to sustained overcurrent conditions, while the magnetic protection element provides rapid operation during high fault currents. This combination helps minimise the risk of cable damage, electrical equipment failure and disruption to power distribution systems.
The ABB A1N125 platform provides a proven foundation for low-voltage circuit protection. Within the Protecta Power range, the EPX-A1C-025L3 is configured for the L3 phase position, enabling organised outgoing circuit protection in compatible three-phase distribution assemblies. Its single-pole design allows protection of an individual phase conductor without requiring a multi-pole breaker.
The 25 A rated current makes this device suitable for appropriately designed outgoing feeders and electrical loads. Its adjustable thermal-magnetic trip characteristics support protection coordination with connected cables and downstream equipment. Correct selection of trip settings, breaking capacity and installation accessories should be based on the electrical installation design and applicable ABB technical guidance.
Typical Applications
- ABB Protecta Power electrical distribution boards.
- Commercial building low-voltage distribution systems.
- Single-phase outgoing circuits connected to the L3 phase.
- Industrial electrical distribution panels.
- Office, retail and public building electrical installations.
- Building services and mechanical plant power distribution.
- Electrical panel building and distribution board assembly.
- Outgoing feeder protection in compatible commercial and industrial installations.
Technical Specifications
| Product group | Protecta Power Devices |
|---|---|
| Series / platform | ABB A1N125 |
| ABB order code | 1SDA123211R1 |
| Product type | Moulded case circuit breaker (MCCB) |
| Rated current | 25 A |
| Frame rating | 125 A |
| Breaking capacity | 25 kA (specified Protecta Power application) |
| Number of poles | 1 |
| Pole configuration | Single-pole (1P), L3 |
| Connection configuration | LSC |
| Trip unit | Thermal-magnetic adjustable (TMA) |
| Thermal trip adjustment | 0.7–1 × In |
| Magnetic trip adjustment | 5–10 × In |
| Protection functions | Overload and short-circuit protection |
| Maximum cable capacity | 50 mm² (ABB A1 single-pole arrangement) |
| Mounting type | Compatible ABB Protecta Power distribution assembly |
| Installation accessories | Appropriate MCCB base plate and cover required |
| Application | Low-voltage electrical power distribution |
Frequently Asked Questions
What is the ABB EPX-A1C-025L3 used for?
The ABB EPX-A1C-025L3 is a 25 A single-pole moulded case circuit breaker designed to protect outgoing electrical circuits against overloads and short circuits in compatible ABB Protecta Power distribution systems.
What is the rated current and breaking capacity of this circuit breaker?
The EPX-A1C-025L3 has a 25 A rated current and is listed with a 25 kA breaking capacity in the ABB Protecta Power A1N125 outgoing circuit breaker range. The applicable breaking capacity must be assessed against the installation voltage and distribution assembly configuration.
What does TMA mean on the ABB EPX-A1C-025L3?
TMA stands for Thermal-Magnetic Adjustable. The trip mechanism provides thermal protection against sustained overload currents and magnetic protection against short-circuit faults. The specified TMA configuration offers thermal adjustment from 0.7–1 × In and magnetic adjustment from 5–10 × In.
What does the L3 designation mean on this circuit breaker?
The L3 designation identifies the breaker as a single-pole device configured for the L3 phase position in compatible ABB Protecta Power distribution assemblies. The EPX-A1C-025L3 protects an individual outgoing phase circuit and is not a three-pole circuit breaker.
Where is the ABB EPX-A1C-025L3 typically installed?
The breaker is designed for installation within compatible ABB Protecta Power distribution boards, where it provides outgoing circuit protection. An appropriate MCCB base plate and cover are required, and installation compatibility should be checked against the selected distribution assembly.
Trusted by Electrical Professionals Worldwide
ABB circuit protection and power distribution solutions are widely specified by electrical engineers, contractors and panel builders for dependable low-voltage electrical installations. The EPX-A1C-025L3 combines 25 A circuit protection, thermal-magnetic adjustable functionality and compatibility with ABB Protecta Power equipment to support safe, reliable power distribution in commercial and industrial environments.
