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ABB S201-Z20 — 1-Pole MCB (DIN Rail)

ABB S201-Z20 MCB 1P Z 20A 277V, 6 kA

MPNS201-Z20

ABB S201-Z20, 1-pole miniature circuit breaker, Trip Curve Z, 20 A, 277 VAC, 6 kA interrupting rating, DIN rail mount.

$10.67Ref. price · indicative, final on quote
ABB S201-Z20 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

S201-Z20 — Specifications
ParameterValue
Amps20
TypeTrip Curve Z
Poles1
MountingDIN Rail
Volts AC277
Breaking capacity6 kA

Product details

ABB S201-Z20 — 1-pole MCB, Trip Curve Z, 20 A

Trip Curve Z is the key decision point here: it trips between 2.5× and 4× rated current, faster than Curve B or C. This makes the S201-Z20 suited for protecting semiconductor circuits, control transformers, and other loads where the inrush is minimal but short-circuit protection must clear quickly. The 20 A rating and 6 kA SCCR at 277 VAC mean it can handle a 20 A continuous load and safely interrupt a fault up to 6,000 A without upstream coordination issues in a typical 277/480 V panel.

The 1-pole form factor fits single-phase branch circuits or individual phase legs in multi-pole assemblies. Rated for 277 VAC line-to-neutral applications, common in North American commercial lighting and receptacle circuits.

Frequently asked questions

What is the interrupting rating of the S201-Z20?

The S201-Z20 has a 6 kA interrupting rating at 277 VAC, sufficient for standard branch-circuit fault levels in commercial and light industrial panels.

What does Trip Curve Z mean for this breaker?

Trip Curve Z means the breaker trips between 2.5× and 4× rated current (50–80 A for this 20 A unit), faster than Curve B or C. This characteristic is designed for protecting semiconductor circuits, control transformers, and other loads with minimal inrush where fast short-circuit clearing is needed.

Where can I buy the S201-Z20 and get current pricing?

The S201-Z20 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.

Will the S201-Z20 fit in a panel designed for the S201M-C3?

Yes. Both the S201-Z20 and S201M-C3 share the same 1-pole, DIN-rail mount form factor and 277 VAC rating. The difference is the trip curve: Z (2.5–4× In) versus C (5–10× In). If the panel wiring and load are sized for 20 A, the S201-Z20 drops in without rewiring — but verify the load's inrush characteristic matches Curve Z's faster trip threshold.

MPN
S201-Z20