{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201-K2","brand":"ABB","brandSlug":"abb","productSlug":"S201-K2","canonicalUrl":"https://aoctrl.com/abb/S201-K2","factsUrl":"https://aoctrl.com/api/mcp/products/S201-K2","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 series, miniature circuit breaker, 2 A, K curve, 1-pole, 277 VAC, 6 kA interrupting capacity, DIN rail mount, UL 1077 supplemental protector.","salesMarkdown":"It carries a 6 kA interrupting capacity at 277 VAC and is listed as a UL 1077 supplemental protector — meaning it protects downstream equipment rather than serving as a service-entrance disconnect. The K curve provides a higher magnetic trip threshold than B or C curves, making it suitable for loads with moderate inrush, such as small motors, transformers, or solenoid banks. ## K curve and application fit The K curve trips magnetically at 8–12× rated current, compared to 5–10× for C curve and 10–14× for D curve. At 2 A, that means the magnetic trip fires between 16 A and 24 A. This gives you enough headroom to start a small motor or charge a capacitive load without nuisance tripping, while still providing short-circuit protection. For purely resistive loads or general-purpose branch circuits, a C curve would trip faster — K is the right choice when you know the load draws a brief inrush above 10× the continuous rating. Listed under UL 1077 (supplemental protection) and CSA 22.2, the S201-K2 is accepted in North American industrial panels where a branch-circuit-rated breaker is not required. It also carries CE marking for European markets. RoHS and REACH compliance documentation is available on request.","metaTitle":"S201-K2 Miniature Circuit Breaker, 2A, K Curve, 1P, 277VAC","metaDescription":"S201-K2 ABB miniature circuit breaker, 2 A, K curve, 1-pole, 277 VAC, 6 kAIC. UL 1077 supplemental protector. Current production, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"2","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":"$59.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201-K2/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy S201-K2 and how do I get a price?","answer":"The S201-K2 is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing — no stock figures or firm lead times are published here."},{"question":"Will S201-K2 drop into a panel that was specified around S202M-C10 without rewiring?","answer":"No — the S202M-C10 is a 2-pole, 10 A, C-curve breaker. The S201-K2 is 1-pole, 2 A, K-curve. They share the same DIN rail footprint but differ in poles, current rating, and trip characteristic, so a direct swap without rewiring and recalculating protection coordination is not possible."},{"question":"What compliance documentation does ABB provide for S201-K2?","answer":"ABB provides UL 1077 and CSA 22.2 listings, CE marking, and RoHS/REACH compliance documentation on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201-K2","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-K2 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}}