Description

The ABB 1SDA066555R1 is a 4-pole circuit breaker from the Formula A2B 250 series, designed to deliver reliable protection for industrial and commercial power installations. It features a TMF (thermo-magnetic fixed) trip unit rated for 160–1600 A, providing both thermal overload and fixed magnetic short-circuit protection. 

This MCCB offers a breaking capacity of 25 kA (Icu), ensuring safe interruption of fault currents.  It has fixed front terminals for secure connection, with a rated insulation voltage of 690 V. The unit is IEC-certified and built for durability, rated for up to 4,000 electrical cycles and 10,000 mechanical operations. 

Compact yet robust, this MCCB is ideal for power-distribution panels, switchgear, and industrial installations where reliable protection and a compact footprint are required.

Key Specifications

• Part Number: 1SDA066555R1 

• Rated Current (In): 160 A 

• Number of Poles: 4P

• Trip Unit: TMF (Thermo-Magnetic Fixed) 160–1600 A

• Breaking Capacity (Icu): 25 kA @ rated voltage 

• Rated Operational Voltage: 550 V AC / 250 V DC 

• Rated Insulation Voltage (Ui): 690 V 

• Impulse Withstand Voltage (Uimp): 6 kV 

• Electrical Durability: 4,000 cycles 

• Mechanical Durability: 10,000 operations 

• Standards: IEC (per ABB) 

• Weight: ~1.75 kg