ABB S5N400 molded case circuit breaker, 1SDA038439R1, 400 A rated, 3-pole, fixed thermal-magnetic trip, line/load terminals.
| Parameter | Value |
|---|---|
| Weight | 1.36 kgs |
The 1SDA038439R1: The 400 A continuous rating means this breaker handles a 400 A load at 40 °C without derating — sized for a main feeder or a large motor branch circuit. The short-circuit release range of 2000-4000 A (I²t on/off) sets the magnetic trip point; at 2000 A it trips instantaneously, at 4000 A it's guaranteed to trip. This is a standard MCCB for 480 VAC or 600 VAC distribution panels, not a motor-circuit protector (no adjustable overloads).
Within the S5N frame, the key variant is the trip unit rating. This 1SDA038439R1 is the 400 A fixed thermal-magnetic version. A 320 A or 630 A version would be a different order code with the same frame size but different trip rating — not pin-compatible for the same load.
This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm availability and current pricing — stock levels and lead time vary by batch.
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