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ABB S401M-C25NP — 1-Pole MCB (DIN Rail)

ABB S401M-C25NP S400 MCB, 1-Pole 25A Curve C, 10kA

MPNS401M-C25NP

ABB S401M-C25NP SMISSLN MCB, 1-pole, 25 A, Trip Curve C, 10 kA interrupting at 240 VAC, DIN rail mount.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

S401M-C25NP — Specifications
ParameterValue
Amps25
TypeTrip Curve C
Poles1
MountingDIN Rail
Volts AC240
Family (Style)S400
Breaking capacity10 kA

Product details

It interrupts faults up to 10 kA at 240 VAC (cite:,).

The 25 A continuous rating and Curve C trip characteristic mean this MCB handles moderate inrush loads — think motor starters, lighting banks, or general-purpose branch circuits where the startup surge runs 5–10× the full-load current. Single-pole construction limits it to line-side protection on a 120/240 VAC split-phase or a single 240 VAC line-to-neutral circuit.

Panel integration

The S400 body is the same 18 mm module width as the S200 series, so it drops into an existing DIN rail layout without respacing the gland plate. Spring-cage terminals accept 0.75–25 mm² conductor; strip length 8 mm.

Frequently asked questions

What is the interrupting rating of S401M-C25NP?

10 kA at 240 VAC — enough for most commercial and light industrial panelboards fed by a 100 kVA or smaller transformer.

Where can I buy S401M-C25NP?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

Will S401M-C25NP drop into a panel specified around S201MUC-K2 without rewiring?

No — the S201MUC-K2 is a 2 A Curve K MCB rated 277 VAC / 250 VDC with a 6 kA interrupting. The S401M-C25NP is 25 A Curve C at 240 VAC with 10 kA interrupting. Different ampacity, trip curve, and voltage rating; the panel would need re-specifying.

MPN
S401M-C25NP