Why Choose the ABB 1SDA100552R1 Tmax XT5N Breaking Part?
The ABB 1SDA100552R1 is a 400 A frame-size breaking part for ABB SACE Tmax XT5 moulded case circuit breaker assemblies. Designed as part of the ABB Tmax XT5N range, it features a fixed four-pole configuration with front terminals for integration into industrial and commercial low-voltage distribution systems.
Unlike a complete moulded case circuit breaker, the ABB 1SDA100552R1 is supplied as the breaker body or breaking part and does not include a protection trip unit. A compatible ABB XT5 trip unit must be selected separately according to the required rated current, protection functions and system-coordination requirements.
The four-pole construction allows all three phase conductors and the neutral conductor to be switched together. With its normal XT5N interruption-performance level, robust operating mechanism and compact format, this breaking part provides a flexible foundation for building a customised circuit protection solution.
Key Advantages
- 400 A frame-size breaking part for ABB Tmax XT5 assemblies.
- Flexible platform for use with compatible ABB XT5 trip units.
- Four-pole configuration for simultaneous phase and neutral switching.
- Fixed installation format for dependable switchboard integration.
- Front terminals provide accessible conductor connections.
- Compact construction helps optimise panel space.
Key Features
- ABB SACE Tmax XT5N series.
- 400 A maximum frame rating.
- Four-pole breaking part.
- Normal N-level interruption performance.
- Fixed mounting configuration.
- Front terminal arrangement.
- Compatible with selected ABB XT5 protection trip units.
- Designed for modular circuit breaker assembly.
A Flexible Platform for Customised Circuit Protection
The ABB 1SDA100552R1 provides the switching and interruption mechanism required for an XT5N circuit breaker assembly. Its modular design allows engineers and panel builders to pair the breaking part with a compatible trip unit selected for the electrical characteristics of the installation.
Available trip-unit options within the wider XT5 platform can provide thermal-magnetic or electronic protection functions. Correct selection depends on factors such as the load current, conductor capacity, prospective fault current and required coordination with upstream and downstream protective devices.
Four-Pole Switching for Three-Phase Systems
The four-pole configuration enables the three phases and neutral conductor to be switched as part of the same assembly. This format is commonly selected for three-phase, four-wire distribution systems where neutral isolation is required for operational, maintenance or installation-design purposes.
Its fixed mounting arrangement is intended for permanent installation inside a suitable switchboard or distribution enclosure. Front-facing terminals support practical cable or busbar connection while maintaining access during assembly and servicing.
Typical Applications
- Industrial low-voltage switchboards.
- Commercial power distribution panels.
- Three-phase, four-wire electrical systems.
- Main and sub-main distribution assemblies.
- Motor control centres.
- OEM machinery and control panels.
