{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201-K1","brand":"ABB","brandSlug":"abb","productSlug":"S201-K1","canonicalUrl":"https://aoctrl.com/abb/S201-K1","factsUrl":"https://aoctrl.com/api/mcp/products/S201-K1","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S201-K1, 1A K-Curve MCB, 1 Pole, 277 VAC, 6 kAIC, DIN Rail mount, UL 1077 supplemental protector.","salesMarkdown":"The ABB S201-K1 is a 1-pole miniature circuit breaker from the S200 series, rated 1 A at 277 VAC with a K-curve trip characteristic and a 6 kA interrupting capacity. The K-curve means it trips between 10 and 14 times rated current — designed for inductive loads like motors, solenoids, and transformers where inrush is higher than resistive loads but lower than what a D-curve would tolerate. DIN-rail mounting means it clips directly into a standard 35 mm rail inside a panel — no additional bracket or screw-down required. This is a supplemental protector, not a branch-circuit-rated main breaker. It goes downstream of a UL 489 main breaker or fuse, protecting a specific load — a small motor starter, a control transformer, or a solenoid valve bank. The DIN-rail footprint matches the S200 family, so it occupies the same 17.5 mm per pole as the rest of the series. If you're replacing an S201M-C3 in an existing panel, the S201-K1 shares the same physical envelope and wiring terminals; no rewiring or rail repositioning needed. The difference is the trip curve — K vs C — so verify the load's inrush profile before swapping. Listed under UL 1077 as a supplemental protector and CSA 22.2. The S200 series carries CE marking for the European market. RoHS and REACH compliance documentation is available from the manufacturer for this order code.","metaTitle":"S201-K1 1A K-Curve DIN Rail Miniature Circuit Breaker, 6 kAI","metaDescription":"S201-K1 1A 277VAC K-Curve MCB, 6 kAIC, UL 1077. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"1","Type":"Trip Curve K","Poles":"1","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$82.50","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201-K1/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for S201-K1?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"When sourcing S201-K1, what's the closest functional second-source — S201M-C3?","answer":"The S201M-C3 is a 3 A C-curve variant in the same S200 series, same 1-pole DIN-rail format and 277 VAC rating. The K-curve on the S201-K1 trips at 10–14× rated current versus the C-curve's 5–10×, so it handles higher inrush without nuisance tripping. They share the same footprint and wiring — drop-in compatible on the rail, but check the load's inrush profile before substituting."},{"question":"Will S201-K1 drop into a panel that was specified around S201M-C3 without rewiring?","answer":"Yes — same 1-pole DIN-rail housing, same terminal layout, same 277 VAC rating. No rewiring needed. The only difference is the trip curve: K vs C."},{"question":"What compliance documentation does this brand provide for S201-K1?","answer":"UL 1077 and CSA 22.2 listing per the product description. RoHS and REACH compliance documentation is available from ABB for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201-K1","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/abb/S201-K1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}