BOM / RFQ

S803S-B63 63A 3P Trip Curve B MCB, 50 kA DIN Rail

MPNS803S-B63

ABB S803S-B63, 63 A, 3-pole, Trip Curve B miniature circuit breaker, 50 kA interrupting capacity, DIN rail mount.

$181.61Ref. price · indicative, final on quote

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ABB S803S-B63 datasheet (PDF)

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

Specifications

S803S-B63 — Identification
Parameter	Value
Number of poles	3

S803S-B63 — Electrical
Parameter	Value
Voltage (AC)	230
Current (A)	63

S803S-B63 — Protection
Parameter	Value
Interrupting rating (AC)	50 kA

S803S-B63 — Mechanical
Parameter	Value
Mounting type	DIN Rail

S803S-B63 — Other specifications
Parameter	Value
Type	Trip Curve B

Product details

The S803S-B63 is a 63 A, 3-pole miniature circuit breaker with a Trip Curve B characteristic, rated for 230 VAC and delivering a 50 kA interrupting capacity.

Compared to the S204-C32 (32 A, 4-pole, Curve C, 10 kA), the S803S-B63 doubles the current rating and quintuples the interrupting capacity. The 3-pole vs 4-pole difference means the S803S-B63 covers three-phase loads without a neutral pole; if the existing panel was wired for a 4-pole breaker with a switched neutral, the S803S-B63 won't drop in without re-terminating the neutral bar.

Frequently asked questions

What is the interrupting rating of S803S-B63?

50 kA at 230 VAC. That's the maximum fault current it can safely interrupt without upstream cascading.

Will S803S-B63 drop into a panel wired for S204-C32?

Not without rewiring the neutral. The S803S-B63 is 3-pole (no switched neutral), while the S204-C32 is 4-pole. The phase conductors will fit, but the neutral bar needs to bypass the breaker.