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ABB S401M-K1NP — 1-Pole MCB (DIN Rail)

ABB S401M-K1NP S400 MCB, 1A Trip Curve K, 1-Pole, 240VAC, 10

MPNS401M-K1NP

ABB S400 series, S401M-K1NP, 1-pole MCB, 1 A, Trip Curve K, 240 VAC, 10 kA interrupting capacity, DIN rail mount.

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

Specifications

S401M-K1NP — Specifications
ParameterValue
Amps1
TypeTrip Curve K
Poles1
MountingDIN Rail
Volts AC240
Family (Style)S400
Breaking capacity10 kA

Product details

Trip Curve K — what it means for the load

Trip Curve K is a magnetic-trip characteristic that sits between B and C curves on instantaneous sensitivity. It typically trips at 8–12× rated current, making it suited for loads with moderate inrush — think small transformers, solenoid valves, or motor control circuits where a standard C-curve might nuisance-trip on startup but a K-curve holds through the surge. At 1 A, this breaker protects the branch circuit, not the load device itself; the downstream equipment should have its own overcurrent protection.

Frequently asked questions

Where can I buy S401M-K1NP and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time estimate.

What is S401M-K1NP's listed amps and type?

The S401M-K1NP is rated 1 A with a Trip Curve K characteristic, 1-pole, 240 VAC, and a 10 kA interrupting capacity.

Will S401M-K1NP drop into a panel that was specified around S201MUC-K2 without rewiring?

Both are 1-pole DIN-rail MCBs, so the physical footprint matches. However, the S201MUC-K2 is rated 2 A at 277 VAC with a 6 kA interrupting capacity, while the S401M-K1NP is 1 A at 240 VAC with 10 kA. The interrupting rating is higher on the S401M, but the ampacity is lower — verify the branch circuit load and SCCR requirements before substituting.

MPN
S401M-K1NP