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1SDX255126R1 ABB EPX-XT4S-TM0504 50A 4-Pole 50kA MCCB TMA
ABB EPX-XT4S-TM0504 is a 50 A four-pole moulded case circuit breaker from the Protecta Power Devices range, featuring an XT4S frame, 50 kA short-circuit breaking capacity and adjustable TMA thermal-magnetic protection for low-voltage electrical distribution systems.
£923.35
Why Choose the ABB EPX-XT4S-TM0504 50A 4-Pole MCCB?
The ABB EPX-XT4S-TM0504 is a robust and reliable 50 A 4-pole moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection in low-voltage electrical distribution systems. As part of the ABB Protecta Power Devices product group, this circuit breaker features an XT4S frame with a thermal-magnetic adjustable (TMA) trip unit, making it suitable for commercial buildings, industrial facilities and electrical distribution assemblies.
The EPX-XT4S-TM0504 combines thermal overload protection with adjustable magnetic short-circuit protection to help safeguard electrical circuits, cables and connected equipment against damaging fault conditions. Its four-pole construction enables the switching of three-phase circuits incorporating a neutral conductor, making it particularly suitable for low-voltage power distribution systems requiring four-pole circuit isolation.
With a 50 A rated current, 50 kA short-circuit breaking capacity and 4-pole configuration, the ABB EPX-XT4S-TM0504 provides effective circuit protection for appropriately designed electrical installations. Its XT4S construction supports integration into compatible ABB Protecta Power distribution boards, switchgear assemblies and industrial electrical panels.
Key Advantages
- Reliable 50 A moulded case circuit breaker for low-voltage electrical distribution.
- 4-pole configuration suitable for three-phase electrical systems incorporating a neutral conductor.
- 50 kA short-circuit breaking capacity for demanding electrical protection applications.
- Integrated thermal-magnetic adjustable (TMA) trip unit for overload and short-circuit protection.
- Robust ABB XT4S frame designed for dependable circuit protection in electrical distribution assemblies.
- Adjustable thermal protection supports coordination with the protected circuit's operating requirements.
- Adjustable magnetic protection enables short-circuit trip settings to be selected within the supported range.
- Manual switching mechanism supports circuit isolation and resetting following a protective trip.
- Suitable for integration into compatible ABB Protecta Power distribution systems.
- Durable moulded case construction supports reliable operation in commercial and industrial environments.
Key Features
- ABB Protecta Power Devices product group.
- EPX-XT4S-TM0504 moulded case circuit breaker.
- XT4S frame for low-voltage circuit protection.
- 50 A rated current.
- 4-pole circuit breaker configuration.
- 50 kA short-circuit breaking capacity.
- TMA thermal-magnetic adjustable trip unit.
- Adjustable thermal overload protection for sustained overcurrent conditions.
- Adjustable magnetic short-circuit protection for high fault currents.
- Manual operating mechanism with circuit breaker position indication.
- Four-pole construction suitable for three-phase distribution circuits with a neutral conductor.
- Designed for integration into compatible low-voltage electrical distribution boards and switchgear assemblies.
- Suitable for commercial, industrial and building electrical distribution applications.
Technical Specifications
- Manufacturer: ABB
- Product group: Protecta Power Devices
- Series / Frame: XT4S
- Model: EPX-XT4S-TM0504
- ABB order code: 1SDX255126R1
- Product type: Moulded case circuit breaker (MCCB)
- Rated current: 50 A
- Number of poles: 4
- Short-circuit breaking capacity: 50 kA
- Rated ultimate short-circuit breaking capacity (Icu): 50 kA at 415 V AC
- Trip unit: TMA – Thermal Magnetic Adjustable
- Overload protection: Adjustable thermal trip protection
- Short-circuit protection: Adjustable magnetic trip protection
- Thermal adjustment range: 35–50 A
- Magnetic trip adjustment range: 250–500 A
- Rated operational voltage: Up to 690 V AC
- Rated insulation voltage (Ui): 1000 V
- Rated impulse withstand voltage (Uimp): 8 kV
- Applicable standard: IEC 60947-2
- Application: Low-voltage electrical distribution
- Operating mechanism: Manual toggle operation
- Construction: Moulded case
- Mounting application: Compatible electrical distribution boards and switchgear assemblies
- Installation environment: Enclosed low-voltage electrical distribution equipment
- Product classification: Low-voltage circuit protection device
Reliable Circuit Protection for Low-Voltage Electrical Systems
Moulded case circuit breakers such as the ABB EPX-XT4S-TM0504 are essential components in modern electrical distribution installations. They automatically interrupt electrical circuits when overload or short-circuit conditions occur, helping reduce the risk of damage to electrical cables, distribution equipment and connected loads while supporting dependable electrical operation.
The TMA thermal-magnetic trip unit combines two complementary protection functions. The thermal element responds to sustained overload currents, while the magnetic element operates during significant short-circuit conditions. Adjustable protection settings allow electrical engineers to configure the circuit breaker within its specified operating ranges to suit the protected installation.
The 50 A four-pole XT4S configuration is particularly suitable for three-phase electrical distribution systems incorporating a neutral conductor. Its robust construction supports installation within compatible electrical panels, while the specified 50 kA breaking capacity at 415 V AC provides substantial short-circuit interruption capability for appropriately designed low-voltage systems.
As part of the ABB Protecta Power Devices range, the EPX-XT4S-TM0504 is intended for integration into compatible electrical distribution equipment. Electrical engineers and installers can use this circuit breaker in commercial and industrial applications where reliable circuit protection, four-pole isolation and adjustable overcurrent protection are required.
Correct selection and installation should consider the electrical system voltage, prospective short-circuit current, conductor sizing, protective device coordination and applicable wiring regulations. Thermal and magnetic trip settings should be selected by a competent electrical professional to ensure suitable protection for the connected circuit.
Typical Applications
- Low-voltage electrical distribution boards.
- ABB Protecta Power distribution assemblies.
- Commercial building electrical installations.
- Industrial power distribution systems.
- Three-phase distribution circuits with neutral conductors.
- Electrical switchboards and control panels.
- Sub-distribution boards and outgoing feeder circuits.
- Manufacturing plants and production facilities.
- Warehouses, offices and commercial premises.
- Building services and electrical infrastructure installations.
- Electrical systems requiring 50 A four-pole circuit protection.
Frequently Asked Questions
What is the ABB EPX-XT4S-TM0504 used for?
The ABB EPX-XT4S-TM0504 is a moulded case circuit breaker designed to protect low-voltage electrical distribution circuits against overloads and short circuits. It is suitable for commercial and industrial distribution boards, switchgear assemblies and three-phase electrical installations.
What is the rated current of the ABB EPX-XT4S-TM0504?
The circuit breaker has a 50 A rated current. Its TMA trip unit provides adjustable thermal overload protection, making it suitable for appropriately designed electrical distribution circuits requiring a 50 A MCCB.
What is the short-circuit breaking capacity of this MCCB?
The ABB EPX-XT4S-TM0504 has a specified 50 kA short-circuit breaking capacity at 415 V AC. This represents its rated ultimate short-circuit interruption capability under the applicable conditions. The electrical system voltage and prospective fault current must be considered when confirming suitability for an installation.
What type of trip unit does the ABB EPX-XT4S-TM0504 use?
This circuit breaker incorporates a TMA thermal-magnetic adjustable trip unit. The thermal element provides adjustable overload protection, while the magnetic element provides adjustable short-circuit protection. These functions help protect electrical circuits and connected equipment against excessive current.
How many poles does the ABB EPX-XT4S-TM0504 have?
The ABB EPX-XT4S-TM0504 is a 4-pole MCCB, suitable for low-voltage distribution applications requiring four-pole switching, including three-phase electrical circuits incorporating a neutral conductor.
Trusted by Electrical Engineers and Installers Worldwide
ABB Protecta Power Devices provide dependable circuit protection solutions for modern commercial and industrial electrical distribution systems. The ABB EPX-XT4S-TM0504 combines a robust XT4S frame, 50 A rated current, four-pole construction, 50 kA breaking capacity and adjustable TMA thermal-magnetic protection to support reliable operation in low-voltage electrical installations.
