The S803U-K20 is a 3-pole miniature circuit breaker rated 20 A at 240 VAC, with a Trip Curve K characteristic and a 50 kA interrupting capacity. Mounts on standard DIN rail — snaps into the panel without tools, compatible with the S800 series accessories like busbars, shunt trips, and auxiliary contacts.
S803U-K20 Miniature Circuit Breaker, 20A, 3P, 240VAC, Curve
MPNS803U-K20
ABB S803U-K20 miniature circuit breaker, 20 A, 3-pole, 240 VAC, Trip Curve K, 50 kA interrupting capacity, DIN rail mount.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 3 |
| Parameter | Value |
|---|---|
| Voltage (AC) | 240 |
| Current (A) | 20 |
| Parameter | Value |
|---|---|
| Interrupting rating (AC) | 50 kA |
| Parameter | Value |
|---|---|
| Mounting type | DIN Rail |
| Parameter | Value |
|---|---|
| Type | Trip Curve K |
Product details
Frequently asked questions
What is the interrupting rating of S803U-K20?
It carries a 50 kA interrupting capacity at 240 VAC, which covers high-fault commercial and light industrial panel applications.
Where can I buy S803U-K20?
Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
What does Trip Curve K mean on this breaker?
Curve K trips magnetically at 8–12× rated current, making it suitable for motor and transformer loads with moderate inrush that would nuisance-trip a B or C curve.
MPN
S803U-K20