The 50 kA interrupting capacity at 400/690 VAC tells you this breaker can safely clear a fault up to 50,000 A without welding contacts or cascading upstream. That rating is verified against the 400/690 VAC operational voltage, not just 230 VAC line-to-neutral. The 10 A continuous rating and 1-pole form factor mean it occupies a single DIN-rail module in the enclosure. For a panel OEM wiring a lighting circuit or a small resistive heater bank, the curve B avoids nuisance tripping from brief voltage sags while still protecting the downstream cable. The 125 VDC rating on the same device covers DC control circuits up to that voltage — useful when the same breaker serves an AC branch and a DC solenoid bus.
S801S-B10 Circuit Breaker, 10A, 1-Pole, Curve B, 50 kA
MPNS801S-B10
S801S-B10, 1-pole miniature circuit breaker, 10 A, trip curve B, DIN rail mount, 50 kA interrupting capacity at 400/690 VAC, 125 VDC.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Amps | 10 |
| Type | Trip Curve B |
| Poles | 1 |
| Mounting | DIN Rail |
| Volts AC | 230 |
| Breaking capacity | 50 kA |
Product details
Frequently asked questions
What are the key ratings of S801S-B10?
The S801S-B10 is a 1-pole miniature circuit breaker rated 10 A continuous with trip curve B, a 50 kA interrupting capacity at 400/690 VAC, and a 125 VDC rating. It mounts on DIN rail.
How does S801S-B10 compare to S201MUC-K2?
The S201MUC-K2 is a 2 A, 1-pole breaker with curve K (8–12x In) and a lower 6 kA interrupting capacity at 277 VAC. The S801S-B10 carries 10 A, curve B (3–5x In), and a 50 kA interrupting capacity at 400/690 VAC. Both mount on DIN rail, but the S801S-B10 handles significantly higher fault currents and is sized for 10 A branch circuits rather than 2 A control circuits.
Where can I buy S801S-B10?
The S801S-B10 is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability.
MPN
S801S-B10