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ABB S201-D2 — 1-Pole MCB (DIN Rail)

S201-D2 Miniature Circuit Breaker 1P D 2A, 6 kA, DIN Rail

MPNS201-D2

ABB S201-D2, 1-pole miniature circuit breaker, 2 A, Trip Curve D, 6 kA interrupting rating at 277 VAC, DIN rail mount, UL 1077 supplementary protector.

$85.65Ref. price · indicative, final on quote
ABB S201-D2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

S201-D2 — Specifications
ParameterValue
Amps2
TypeTrip Curve D
Poles1
MountingDIN Rail
Volts AC277
Breaking capacity6 kA

Product details

It's a UL 1077 supplementary protector, so it's not a service-entrance main breaker but rather a branch-circuit component inside a control panel or downstream of a listed branch-circuit overcurrent device.

Rated for 277 VAC line-to-neutral on a 480Y/277 V system, or 60/110 VDC for DC control circuits.

Curve D trips magnetically at 10–20 times rated current (20–40 A for this 2 A breaker), compared to Curve C at 5–10x. That wider magnetic trip band is what lets it ride through the inrush of a small motor, a DC power supply's input capacitor bank, or a control transformer without dropping out. But it also means the breaker won't protect a resistive load against a modest overload as quickly — the thermal element still handles the long-time region, but for short-circuit protection, the fault needs to be high enough to push into the magnetic zone. If your load is purely resistive (heaters, incandescent lamps), a Curve C or B would be a better fit.

Frequently asked questions

What is the interrupting rating of the S201-D2?

6 kA at 277 VAC, which is the standard interrupting capacity for this series on a 277/480 VAC system. For higher fault currents (10 kA), look at the S203 variants in the same family.

Will the S201-D2 drop into a panel specified for the S201M-C3?

Physically yes — both are 1-pole DIN-rail breakers with the same footprint. But the S201M-C3 is a 3 A Curve C, while this is a 2 A Curve D. The Curve D handles higher inrush, so it's not a direct electrical swap unless the load's inrush characteristics match. If the original spec called for 3 A Curve C, dropping in a 2 A Curve D could nuisance-trip on steady-state current or fail to protect the circuit correctly.

Where can I buy the S201-D2?

We source it to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here, but we can quote firm lead times and unit pricing on request.

MPN
S201-D2