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ABB ST203M-B8NA — 3-Pole MCB (DIN Rail)

ABB ST203M-B8NA

MPNST203M-B8NA

8A, 480Y/277V, 10 kAIC, B-Curve, UL 1077|Miniature Circuit Breaker, 3-Pole, 8 Amps, 480Y/277V AC. B-Curve. 10 kAIC. ST200M Series. Supplemental Protectors. UL 1077, CSA 22.2. Includes Neutral

ABB ST203M-B8NA datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jun 2026

Specifications

ST203M-B8NA — Identification
ParameterValue
Number of poles3
ST203M-B8NA — Electrical
ParameterValue
Voltage (AC)277
Current (A)8
ST203M-B8NA — Protection
ParameterValue
Interrupting rating (AC)10 kA
ST203M-B8NA — Mechanical
ParameterValue
Mounting typeDIN Rail
ST203M-B8NA — Other specifications
ParameterValue
TypeTrip Curve B
MPN
ST203M-B8NA