The ABB S203-D1 is a 3-pole miniature circuit breaker rated at 1 A with a Trip Curve D characteristic, designed for DIN-rail mounting in distribution panels and control cabinets. It interrupts fault currents up to 10 kA at 277 VAC, making it suitable for protecting motor circuits and transformer-fed loads where high inrush currents are expected — Curve D provides a wider magnetic trip threshold (10–20× In) than B or C curves, so nuisance tripping during startup is less likely.
S203-D1 Miniature Circuit Breaker, 3P, 1A, Curve D, 10 kA
MPNS203-D1
ABB S203-D1 miniature circuit breaker, 3-pole, 1 A, Trip Curve D, 277 VAC, 10 kA interrupting capacity, DIN rail mount.
StockContact for availability
Lead timeCall for availability wk
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Number of poles | 3 |
Electrical
| Parameter | Value |
|---|---|
| Voltage (AC) | 277 |
| Current (A) | 1 |
Protection
| Parameter | Value |
|---|---|
| Interrupting rating (AC) | 10 kA |
Mechanical
| Parameter | Value |
|---|---|
| Mounting type | DIN Rail |
Other specifications
| Parameter | Value |
|---|---|
| Type | Trip Curve D |
Product details
Frequently asked questions
What is the interrupting rating of S203-D1?
The S203-D1 has a 10 kA interrupting capacity at 277 VAC, which covers most commercial and light industrial fault levels.
Where can I buy S203-D1?
The S203-D1 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
S203-D1