Why Choose the ABB EPX-XT1S-TM1253 125A 3-Pole MCCB?
The ABB EPX-XT1S-TM1253 is a 125 A, 3-pole moulded case circuit breaker (MCCB) from the ABB Protecta Power Devices range. Featuring an XT1S configuration, a specified 50 kA breaking capacity and a TMA thermal-magnetic trip unit, this circuit breaker is designed for low-voltage electrical distribution applications requiring reliable overload and short-circuit protection.
The ABB EPX-XT1S-TM1253 125 A MCCB combines three-pole circuit protection with thermal-magnetic tripping technology. Its thermal protection function responds to sustained overload conditions, while its magnetic protection function responds to high fault currents, helping protect electrical conductors and connected equipment when the breaker is correctly selected and installed.
Identified by ABB order code 1SDX254926R1, the EPX-XT1S-TM1253 is specified with a 125 A rated current, three poles, 50 kA breaking capacity and TMA trip unit. It provides a dedicated circuit protection solution for compatible electrical distribution boards, switchboards and industrial power distribution assemblies.
Key Advantages
- 125 A rated current for compatible low-voltage electrical distribution circuits.
- 50 kA specified breaking capacity for applications requiring high short-circuit interruption capability.
- Three-pole (3P) configuration for coordinated protection of three electrical conductors.
- TMA thermal-magnetic trip unit for overload and short-circuit protection.
- XT1S circuit-breaker configuration within the ABB Protecta Power Devices range.
- Moulded case construction suitable for professional electrical distribution equipment.
- Supports the protection of electrical conductors and connected equipment against overcurrent faults.
- Suitable for compatible three-phase electrical distribution applications.
- Manufacturer-specific order code supports accurate specification and procurement.
- Designed for integration into properly engineered low-voltage electrical installations.
Key Features
- ABB Protecta Power Devices MCCB.
- XT1S circuit-breaker configuration.
- 125 A rated current.
- 3P three-pole construction.
- 50 kA specified short-circuit breaking capacity.
- TMA thermal-magnetic trip unit.
- Thermal protection principle for sustained overload conditions.
- Magnetic protection principle for short-circuit fault conditions.
- Moulded case circuit-breaker design for low-voltage electrical distribution.
- Suitable for compatible electrical distribution boards and switchboard assemblies.
- ABB product model EPX-XT1S-TM1253.
- ABB manufacturer order code 1SDX254926R1.
Technical Specifications
- Manufacturer: ABB
- Product model: EPX-XT1S-TM1253
- ABB order code: 1SDX254926R1
- Product family: Protecta Power Devices
- ABB product group: Protecta Power Devices
- Circuit-breaker configuration: XT1S
- Product type: Moulded Case Circuit Breaker (MCCB)
- Rated current: 125 A
- Number of poles: 3
- Pole configuration: 3P (three-pole)
- Specified breaking capacity: 50 kA
- Trip unit: TMA
- Trip technology: Thermal-magnetic
- Overload protection principle: Thermal
- Short-circuit protection principle: Magnetic
- Primary application: Low-voltage electrical circuit protection
- Installation environment: Compatible electrical distribution boards and switchboard assemblies
125A Thermal-Magnetic Protection with 50kA Breaking Capacity
Moulded case circuit breakers are widely used in low-voltage electrical distribution systems to provide switching and protection against excessive current. Thermal-magnetic MCCBs combine overload protection and short-circuit protection within a single device, making them suitable for a broad range of industrial and commercial distribution applications.
The ABB EPX-XT1S-TM1253 provides this functionality in a 125 A, three-pole XT1S configuration. Its TMA trip unit uses thermal and magnetic protection principles, while the specified 50 kA breaking capacity makes it relevant to installations where the prospective fault current requires a suitably rated protective device.
The 50 kA rating must be assessed at the applicable operational voltage and under the relevant breaking-capacity test conditions. The precise rated voltage, Icu and Ics values, trip adjustment ranges, mounting arrangement and terminal configuration should be confirmed using the applicable ABB technical documentation. Correct circuit-breaker selection also requires consideration of cable protection, fault levels, discrimination and the overall electrical installation design.
Typical Applications
- ABB Protecta Power electrical distribution assemblies.
- Low-voltage circuits requiring 125 A protection.
- Three-phase electrical distribution systems.
- Commercial building main and sub-distribution boards.
- Industrial electrical power distribution panels.
- Switchboard installations requiring a 50 kA-rated MCCB at the specified conditions.
- Electrical installations requiring thermal-magnetic overload and short-circuit protection.
- Compatible machinery and equipment distribution circuits.
- Professional electrical panel manufacturing and switchboard integration.
- Maintenance and replacement of correctly matched ABB MCCB configurations.
