The ABB S201-K0.5 is a 1-pole supplemental protector from the S200 series, rated 0.5 A with a K-curve trip characteristic at 277 VAC. The K-curve means it tolerates moderate inrush — typical for motor control or transformer primary circuits — without nuisance tripping on startup, while still providing short-circuit protection. The 6 kA interrupting rating at 277 VAC is the fault-clearing capacity; below that level it safely interrupts without welding contacts or cascading damage upstream. Mounts on standard DIN rail in a panel or enclosure.
S201-K0.5 0.5A K-Curve 1-Pole DIN Rail MCB, 6 kAIC
MPNS201-K0.5
ABB S200 series, supplemental protector, S201-K0.5, 0.5 A, K-curve, 1-pole, 277 VAC, 6 kAIC, DIN rail mount.
$19.05Ref. price · indicative, final on quote
StockContact for availability
Lead timeCall for availability wk
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026
Specifications
Specifications
| Parameter | Value |
|---|---|
| Amps | 0.500 |
| Type | Trip Curve K |
| Poles | 1 |
| Mounting | DIN Rail |
| Volts AC | 277 |
| Breaking capacity | 6 kA |
Product details
Frequently asked questions
Where can I buy S201-K0.5?
Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
What is S201-K0.5's listed amps and trip curve?
Rated 0.5 A with a K-curve trip characteristic — designed for moderate inrush loads like small transformers or motor starters.
Will S201-K0.5 drop into a panel that was specified around S201M-C10 without rewiring?
Physically yes — same 1-pole DIN-rail footprint and 6 kAIC interrupting rating. But the amp rating and trip curve differ; the K0.5 protects a specific low-current, high-inrush load, not a general branch circuit.
What compliance documentation does S201-K0.5 carry?
Listed under UL 1077 (supplemental protector) and CSA 22.2. RoHS and REACH compliance is standard for the S200 series.
MPN
S201-K0.5