Why Choose the ABB EPX-A1C-125L3 125A Single-Pole MCCB?
The ABB EPX-A1C-125L3 is a reliable 125 A single-pole moulded case circuit breaker (MCCB) designed for overload and short-circuit protection in low-voltage electrical distribution systems. As part of the ABB Protecta Power Devices range, this circuit breaker incorporates the ABB Formula A1N125 platform, providing dependable thermal-magnetic protection for commercial and industrial electrical installations.
The EPX-A1C-125L3 features a TMA thermal-magnetic trip unit, combining thermal overload protection with magnetic short-circuit protection. This arrangement helps protect electrical circuits against excessive current while providing a straightforward protective solution for outgoing distribution circuits. The device is specified with a single-pole configuration and LSC L3 arrangement for integration into compatible ABB Protecta Power assemblies.
With a rated current of 125 A and an A1N125 circuit breaker designation, the EPX-A1C-125L3 is suitable for single-phase outgoing circuit applications requiring appropriately rated protection. The ABB Formula A1N125 single-pole range is associated with a 25 kA ultimate short-circuit breaking capacity at 415 V AC, subject to the manufacturer's applicable operating conditions. Identified by ABB order code 1SDA123222R1, this device provides a coordinated solution for professional low-voltage distribution panel construction.
Key Advantages
- Reliable 125 A single-pole moulded case circuit breaker for low-voltage electrical distribution.
- ABB Formula A1N125 platform designed for dependable circuit protection.
- TMA thermal-magnetic protection against overload and short-circuit conditions.
- 25 kA ultimate breaking capacity at 415 V AC associated with the A1N125 single-pole configuration.
- LSC L3 arrangement for the specified Protecta Power outgoing circuit position.
- Compact single-pole construction supports efficient use of distribution panel space.
- Designed for integration into compatible ABB Protecta Power electrical distribution assemblies.
- Thermal-magnetic protection provides straightforward circuit protection without requiring an electronic trip unit.
- Suitable for commercial, industrial and building services electrical installations.
Key Features
- ABB Protecta Power Devices product range.
- EPX-A1C-125L3 manufacturer product designation.
- 1SDA123222R1 ABB order code.
- Formula A1N125 moulded case circuit breaker platform.
- 125 A rated current.
- Single-pole (1P) circuit breaker configuration.
- LSC L3 manufacturer-specified arrangement.
- TMA thermal-magnetic trip unit.
- Thermal overload protection for sustained overcurrent conditions.
- Magnetic short-circuit protection for high fault currents.
- 25 kA Icu at 415 V AC for the corresponding A1N125 single-pole performance configuration.
- Manual circuit switching and protective tripping functionality.
- Designed for compatible Protecta Power outgoing distribution applications.
Technical Specifications
- Manufacturer: ABB
- Product range: Protecta Power Devices
- Circuit breaker family: Formula
- Frame: A1N125
- Model: EPX-A1C-125L3
- ABB order code: 1SDA123222R1
- Product type: Moulded case circuit breaker (MCCB)
- Rated current: 125 A
- Number of poles: 1
- Pole configuration: 1P
- Manufacturer configuration: 1p+ LSC L3
- LSC arrangement: L3
- Trip unit: TMA
- Trip technology: Thermal-magnetic
- Overload protection: Thermal
- Short-circuit protection: Magnetic
- Ultimate breaking capacity (A1N125 1P): 25 kA at 415 V AC
- Rated operational voltage (A1 1P platform): Up to 415 V AC
- Rated insulation voltage (A1 platform): 690 V
- Rated impulse withstand voltage (A1 platform): 6 kV
- Mounting application: Compatible Protecta Power distribution assembly
- Product category: Thermal-magnetic moulded case circuit breakers
- Application: Single-pole outgoing circuit protection
Reliable Thermal-Magnetic Protection for Electrical Distribution
Moulded case circuit breakers protect electrical circuits by automatically interrupting current when overload or short-circuit conditions occur. Thermal-magnetic MCCBs combine two complementary protection mechanisms: a thermal element that responds to sustained overcurrent and a magnetic element that responds rapidly to high short-circuit currents.
The ABB EPX-A1C-125L3 uses a TMA thermal-magnetic trip arrangement to provide these protective functions within a compact single-pole circuit breaker. Thermal protection helps prevent prolonged overload conditions from damaging cables and connected equipment, while magnetic protection provides rapid fault interruption when sufficiently high short-circuit currents occur.
The ABB Formula A1N125 platform is developed for low-voltage circuit protection applications requiring reliable switching and protective performance. Its moulded case construction provides a practical solution for outgoing feeder protection in commercial and industrial electrical distribution systems.
Within the ABB Protecta Power system, the EPX-A1C-125L3 is specified for an LSC L3 outgoing arrangement. This configuration supports integration into the corresponding distribution assembly layout. Correct installation requires selection of compatible mounting accessories, verification of available fault current and coordination with upstream and downstream protective devices. Circuit breaker ratings and protective settings must be assessed against the applicable ABB documentation and installation requirements.
Typical Applications
- ABB Protecta Power low-voltage distribution panelboards.
- Single-pole outgoing feeder protection.
- Electrical distribution circuits requiring 125 A protection.
- Commercial building power distribution systems.
- Industrial electrical distribution installations.
- Building services and electrical infrastructure panels.
- Electrical switchboard manufacturing and assembly.
- Distribution systems using the specified LSC L3 outgoing arrangement.
- OEM electrical distribution equipment integration.
- Refurbishment and replacement of compatible circuit protection devices.
