What it is
The ABB 1SDA054133R0001 is a Tmax T4H 320 molded-case circuit breaker with a PR221DS-LS trip unit set to In=320 A, built as a 3-pole device for front-mount installation in low-voltage switchgear.
Where it sits and how it mounts
Front-mount format (F F) suits fixed withdrawable or fixed-pattern panel layouts where the breaker is bolted directly to the main busbars from the front of the cubicle.
Lifecycle and supply
Lifecycle stage is listed as current, so the order code is still being produced and is not subject to a last-time-buy window.