1SDX253945R1 ABB EPX-XT4N-TM0204 20A 4P 36kA MCCB TMA

Why Choose the ABB EPX-XT4N-TM0204 Protecta Power Circuit Breaker?

The ABB EPX-XT4N-TM0204 is a robust 20 A four-pole moulded case circuit breaker (MCCB) designed to provide dependable overload and short-circuit protection in commercial and industrial low-voltage electrical distribution systems. Part of the ABB Protecta Power Devices range, this circuit breaker incorporates the ABB SACE Tmax XT4N160 platform with a TMA thermal-magnetic protection designation, offering reliable protection for compatible electrical distribution assemblies.

Featuring a 36 kA short-circuit breaking capacity, the EPX-XT4N-TM0204 is designed to interrupt electrical faults while helping safeguard cables, distribution equipment and connected loads. Its thermal-magnetic protection technology combines overload protection with magnetic short-circuit protection, making it suitable for appropriately designed low-voltage distribution circuits.

With a 20 A rated current, four-pole configuration and 140 mm nominal width, this MCCB is suitable for three-phase electrical distribution systems requiring four-pole switching. Its established ABB Tmax XT4N construction and compatibility with appropriately configured ABB Protecta Power switchboards make it a practical choice for electrical contractors, panel builders and maintenance engineers.

Key Advantages

• 20 A rated current provides protection for appropriately designed low-voltage electrical circuits.
• Four-pole (4P) configuration supports simultaneous switching of three phase conductors and a neutral conductor where required.
• 36 kA short-circuit breaking capacity provides protection against significant prospective fault currents.
• TMA thermal-magnetic protection designation identifies a circuit breaker designed for overload and short-circuit protection.
• ABB SACE Tmax XT4N160 platform provides robust mechanical construction and dependable switching performance.
• 140 mm nominal width supports integration into compatible distribution board layouts.
• Thermal-magnetic protection operates without requiring an external auxiliary power supply.
• Designed for integration into compatible ABB Protecta Power distribution assemblies.

Key Features

• ABB Protecta Power Devices product family.
• EPX-XT4N-TM0204 model designation.
• ABB SACE Tmax XT4N moulded case circuit breaker platform.
• 20 A rated current.
• XT4N160 frame with a maximum frame rating of 160 A.
• Four-pole (4P) circuit breaker construction.
• 36 kA short-circuit breaking capacity at 415 V AC.
• TMA thermal-magnetic protection designation.
• Thermal overload protection against sustained excessive current.
• Magnetic short-circuit protection for rapid fault interruption.
• Four-pole switching capability for compatible three-phase and neutral distribution systems.
• Manual operating mechanism for circuit switching and resetting.
• 140 mm nominal width for the four-pole XT4 configuration.
• Suitable for low-voltage AC electrical distribution applications.
• Compatible with appropriately selected ABB Tmax XT4 mounting and connection accessories.

Reliable Thermal-Magnetic Protection for Four-Pole Distribution

The ABB EPX-XT4N-TM0204 incorporates thermal-magnetic protection technology to safeguard electrical installations against sustained overloads and short-circuit faults. The thermal protection element responds to excessive current over time, helping prevent overheating of electrical conductors and connected equipment. The magnetic protection element responds rapidly to high fault currents, enabling prompt circuit disconnection.

The four-pole construction supports applications where three phase conductors and a neutral conductor must be switched together. This arrangement is useful in compatible three-phase distribution systems requiring neutral switching. The neutral pole's protection characteristics and suitability must be verified for the selected circuit breaker configuration and installation requirements.

The ABB SACE Tmax XT4N160 platform offers a robust moulded case design for commercial and industrial power distribution. Its nominal four-pole width of 140 mm provides a defined mechanical footprint for switchboard planning, while the manual operating mechanism supports straightforward circuit switching and resetting.

When installing the EPX-XT4N-TM0204 within an ABB Protecta Power distribution board, suitable mounting components, terminal connections and protective covers must be selected. Electrical designers should verify prospective fault current, conductor sizing, neutral arrangements and protective device coordination before commissioning.

Typical Applications

• ABB Protecta Power electrical distribution boards.
• Commercial low-voltage electrical distribution systems.
• Industrial electrical switchboards and distribution panels.
• 20 A four-pole outgoing feeder protection.
• Three-phase and neutral distribution circuits.
• Building services and mechanical plant distribution.
• Manufacturing and industrial facility electrical infrastructure.
• Commercial switchboards and sub-distribution assemblies.
• Electrical panel building and switchboard manufacturing.
• Distribution circuits requiring thermal-magnetic overload and short-circuit protection.