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ABB S202M-B20 — 2-Pole MCB (DIN Rail)

ABB S202M-B20 S200M MCB, 20 A, Trip Curve B, 2-Pole, DIN Rai

MPNS202M-B20

ABB S202M-B20, S200M series, 2-pole miniature circuit breaker, 20 A, Trip Curve B, 277 VAC / 125 VDC, 6 kA interrupting rating, DIN rail mount.

ABB S202M-B20 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

S202M-B20 — Specifications
ParameterValue
Amps20
TypeTrip Curve B
Poles2
MountingDIN Rail
Volts AC277
Volts DC125
Breaking capacity6 kA
Interrupt rating DC10 kA

Product details

It mounts on DIN rail and is rated for 277 VAC and 125 VDC circuits.

Trip Curve B — what it means on the line

Trip Curve B means the magnetic trip operates at 3 to 5 times rated current (60–100 A for this 20 A unit). That's a fast trip on short circuits but avoids nuisance tripping on inrush from resistive loads like heaters, lighting banks, or control transformers. For motor circuits or anything with a high starting surge, Curve C or D would be the pick — Curve B is for the loads that don't kick.

Panel integration

The 2-pole width (2 modules, ~36 mm) fits standard cutouts. No special busbar or comb needed for single-phase or DC circuits; the integral tunnel terminals take the incoming and outgoing conductors directly.

Frequently asked questions

What is the difference between S202M-B20 and S202M-B10?

The only difference is the amp rating: S202M-B20 is 20 A, S202M-B10 is 10 A. Same 2-pole form factor, same Trip Curve B, same 277 VAC / 125 VDC ratings, same 6 kA interrupting capacity. They drop into the same panel footprint and busbar arrangement — no rewiring needed if swapping one for the other, as long as the load current matches the new rating.

What compliance documentation does ABB provide for S202M-B20?

ABB typically supplies CE declaration of conformity, RoHS and REACH compliance statements, and IEC/EN 60898-1 certification for the S200M series. Specific documentation pack is issued with the shipment or available on request.

MPN
S202M-B20