The S203-B16 is a 3-pole miniature circuit breaker rated 16 A with a Trip Curve B characteristic, meaning it trips between 3 and 5 times rated current — designed for resistive or lightly inductive loads where inrush is low, like lighting circuits or control transformers, not motor starting. Its 6 kA interrupting rating at 277 VAC handles typical branch-circuit fault levels in commercial panelboards; the 10 kA DC rating at 110 VDC covers control-power supplies and battery-backed circuits. Mounts on standard DIN rail.
S203-B16 Miniature Circuit Breaker, 16A, 3P, Curve B, DIN Ra
MPNS203-B16
ABB S203-B16, miniature circuit breaker, 16 A, 3-pole, Trip Curve B, DIN rail mount, 6 kA interrupting capacity at 277 VAC, 10 kA at 110 VDC.
$104.06Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 3 |
| Parameter | Value |
|---|---|
| Voltage (AC) | 277 |
| Current (A) | 16 |
| Parameter | Value |
|---|---|
| Interrupting rating (AC) | 6 kA |
| Parameter | Value |
|---|---|
| Mounting type | DIN Rail |
| Parameter | Value |
|---|---|
| Type | Trip Curve B |
| Volts DC | 110 |
| Interrupt rating DC | 10 kA |
Product details
MPN
S203-B16