ABB 1SDA068329R1 XT4S 250 TMA 200-2000 4p F F InN=100% 50kA Molded Case Circuit Breaker (MCCB)

The ABB 1SDA068329R1 is a Tmax XT4S 250 moulded case circuit breaker fitted with a TMA thermomagnetic release, rated In 200 A inside the 250 A frame. Built for four-pole, fixed, front-terminal installation, it carries a 50 kA breaking capacity at 415 V AC with adjustable thermal (140-200 A) and magnetic (1000-2000 A) trip settings for close coordination with downstream protection.

Technical Specifications

Certifications & Standards

• IEC/EN 60947-2

Selection Notes

The TMA thermomagnetic release on the 1SDA068329R1 is factory-set at 200 A inside the 250 A XT4S frame, so the 140-200 A thermal band and 1000-2000 A instantaneous trip can be dialed in without changing the breaker body if the protected load grows. Short-circuit performance class S pairs an equal 50 kA ultimate (Icu) and service (Ics) rating at 415 V AC, meaning the breaker stays serviceable after clearing a fault at its full rated capacity rather than only surviving a single interruption. Four-pole, fixed, front-terminal construction with 100% rated neutral (InN=100%) suits direct panel mounting on three-phase-plus-neutral distribution where the frame's higher 250 A busbar rating leaves headroom for a larger release later.