What this part is
The 1SDA068105R1: This is an ABB XT4N 250 TMA distribution circuit breaker — 4-pole, 225 A rated current (In), on a 250 A frame (Iu). The thermal-magnetic trip unit provides overload and short-circuit protection. Rated for 690 V AC at 50/60 Hz. The type string XT4N 250 TMA 225-2250 4p F F InN=50% indicates the trip unit is set to 50% of the maximum adjustability — meaning it's factory-calibrated for 225 A on a 250 A frame. This is a standard configuration for applications needing headroom on the frame.
Lifecycle & sourcing
Sourced against an RFQ. No last-time-buy to watch.