Why Choose the ABB 1SDA100556R1 Tmax XT5S Breaking Part?
The ABB 1SDA100556R1 is a 400 A four-pole breaking part designed for modular ABB SACE Tmax XT5 moulded case circuit breaker assemblies. Part of the ABB Tmax XT5S range, it combines a fixed mounting format with front terminals and enhanced short-circuit interruption performance for demanding industrial and commercial power distribution systems.
This product is supplied as the circuit breaker's breaking part and does not include a protection trip unit. A compatible ABB XT5 thermal-magnetic or electronic trip unit must therefore be selected separately to create a complete MCCB with the required overload, short-circuit and system-coordination characteristics.
The four-pole construction enables all three phase conductors and the neutral conductor to be switched together. With a rated uninterrupted current of 400 A, an operational voltage of up to 690 V AC and a breaking capacity of 50 kA at 415 V AC, the ABB 1SDA100556R1 provides a flexible foundation for reliable circuit protection in higher-fault-level installations.
Key Advantages
- 400 A breaking part for ABB Tmax XT5 circuit breaker assemblies.
- XT5S interruption-performance level for demanding installations.
- Four-pole configuration supports simultaneous phase and neutral switching.
- Compatible with selected ABB XT5 thermal-magnetic and electronic trip units.
- Fixed mounting format provides secure switchboard integration.
- Front terminals simplify cable and busbar connections.
Key Features
- ABB SACE Tmax XT5S series.
- 400 A rated uninterrupted current.
- Four-pole breaking part.
- S-level short-circuit performance.
- Fixed installation configuration.
- Front terminal connection arrangement.
- Modular compatibility with ABB XT5 trip units.
- Suitable for AC and selected DC applications.
Flexible Modular Circuit Protection
The ABB 1SDA100556R1 provides the switching and interruption mechanism required for an XT5S circuit breaker assembly. By pairing it with a suitable ABB XT5 trip unit, engineers can configure the completed MCCB around the load current, conductor capacity, prospective fault level and required protection functions.
This modular approach allows panel builders to standardise the breaker platform while selecting thermal-magnetic or electronic protection appropriate to each circuit. It can also simplify servicing and future system modifications because the breaking part and trip unit are selected as compatible components.
The XT5S performance level is designed for electrical installations with higher prospective fault currents. The ABB 1SDA100556R1 offers an ultimate and service breaking capacity of 50 kA at 415 V AC, making it suitable for use in industrial switchboards, main distribution assemblies and installations positioned closer to transformers or high-capacity supplies.
Four-Pole Switching for Three-Phase Systems
Its four-pole arrangement enables the three phase conductors and neutral conductor to be switched by the same mechanism. This configuration is commonly specified for three-phase, four-wire networks where neutral isolation is required for operational safety, maintenance or installation compliance.
Typical Applications
- Industrial low-voltage switchboards.
- Main and sub-main distribution panels.
- Three-phase, four-wire electrical systems.
- Motor control centres.
- Commercial power distribution systems.
- OEM machinery and control-panel assemblies.
