{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201-K5","brand":"ABB","brandSlug":"abb","productSlug":"S201-K5","canonicalUrl":"https://aoctrl.com/abb/S201-K5","factsUrl":"https://aoctrl.com/api/mcp/products/S201-K5","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S201-K5, 1-pole K-curve miniature circuit breaker, 5 A, 277 V AC, 6 kA interrupting capacity, UL 1077 supplemental protector.","salesMarkdown":"It's listed as a UL 1077 supplemental protector, meaning it's intended for branch-circuit overcurrent protection within equipment — not as a service-entrance main breaker. The K-curve is engineered for moderate inrush tolerance, typically used on inductive loads like motor starters, solenoid valves, and small transformers where a standard C-curve might nuisance-trip on startup. ## Ratings and deployment context Rated 277 V AC with a 6 kA interrupting capacity, this breaker mounts on standard DIN rail — common in control panels and distribution boards. The single-pole format occupies one 18 mm module, so it fits tightly in crowded enclosures. For a 5 A branch feeding a contactor coil or a small pump motor, the K-curve holds through the magnetizing inrush without opening, but trips fast on hard shorts. Listed under UL 1077 and CSA 22.2, the S201-K5 is recognized for use in North American industrial control panels as a supplemental protector. The UL 1077 classification means it's not a branch-circuit rated breaker per UL 489, but it's accepted downstream of a UL 489 device for component-level overcurrent protection. RoHS and REACH compliance documentation is standard with the series.","metaTitle":"ABB S201-K5 S200 Series, 5A K-Curve, 1-Pole, 277V, 6kA","metaDescription":"ABB S201-K5 5A K-curve miniature circuit breaker, 1-pole, 277V AC, 6 kAIC, UL 1077 supplemental protector. Current production. 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":"5","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":"$42.96","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201-K5/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for S201-K5?","answer":"Pricing and stock are confirmed at quote time against an RFQ. Submit a request through the usual channel and we'll return current availability and a firm price."},{"question":"Will S201-K5 drop into a panel specified around S201M-C3 without rewiring?","answer":"Both are 1-pole DIN-rail breakers from the S200 family with the same 277 V AC rating and 18 mm width, so the mechanical fit is identical. The difference is the trip curve — K-curve on the S201-K5 versus C-curve on the S201M-C3. If the panel was designed around a C-curve, swapping to a K-curve may change nuisance-trip behavior on transformer or motor loads. Check the load type before substituting."},{"question":"What is S201-K5's listed amps?","answer":"The S201-K5 is rated 5 A."},{"question":"What is S201-K5's listed type?","answer":"The S201-K5 has a K-curve trip characteristic."},{"question":"What compliance documentation does ABB provide for S201-K5?","answer":"The S201-K5 is listed under UL 1077 and CSA 22.2. RoHS and REACH compliance documentation is standard with the S200 series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201-K5","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-K5 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}}