{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201MUC-K8","brand":"ABB","brandSlug":"abb","productSlug":"S201MUC-K8","canonicalUrl":"https://aoctrl.com/abb/S201MUC-K8","factsUrl":"https://aoctrl.com/api/mcp/products/S201MUC-K8","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200MUC series, S201MUC-K8, 1-pole miniature circuit breaker, Trip Curve K, 8 A, 277 VAC / 250 VDC, 6 kA interrupting rating AC, 10 kA DC.","salesMarkdown":"It handles 277 VAC and 250 VDC circuits, with interrupting capacities of 6 kA on AC and 10 kA on DC. The K curve is the key spec here — it's designed for inductive and motor loads where inrush currents are higher than resistive loads, so it holds through the start-up spike without nuisance tripping, unlike a B or C curve that would drop out on a motor's first half-cycle. ## Peer comparison The closest sibling is the S201MUC-K2, which shares the same 1-pole DIN-rail footprint, same voltage ratings (277 VAC / 250 VDC), and same interrupting capacities (6 kA AC, 10 kA DC). The only difference is the current rating — 2 A vs 8 A. If your BOM line calls for an 8 A K-curve, the K2 won't substitute without a coordination review; the magnetic trip threshold scales with the amp rating, so the K2 trips at a lower overcurrent. Stick with the K8 for the 8 A slot. ## Interrupting capacity in context The 10 kA DC rating is useful for DC distribution in telecom or UPS downstream circuits.","metaTitle":"ABB S201MUC-K8 MCB 1P K 8A, 6 kA AC / 10 kA DC","metaDescription":"ABB S201MUC-K8 miniature circuit breaker, 1-pole, Trip Curve K, 8 A, 277 VAC / 250 VDC, 6 kA interrupting capacity AC. DIN rail mount. Current production. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"8","Type":"Trip Curve K","Poles":"1","title":"S201MUC-K8","Mounting":"DIN Rail","Volts AC":"277","Volts DC":"250","description":"ABB S201MUC-K8 MCB S200MUC 1P K 8A|ABB S201MUCK8 MCB S200MUC 1P","lifecycle_stage":"current","Interrupt Rating AC":"6 kA","Interrupt Rating DC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/57f20f7345b799d373092e474a9b4e3b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the interrupting rating of S201MUC-K8?","answer":"The S201MUC-K8 has a 6 kA interrupting capacity on AC circuits at 277 VAC and 10 kA on DC circuits at 250 VDC."},{"question":"Where can I buy S201MUC-K8?","answer":"The S201MUC-K8 is sourced to order against an RFQ through independent distribution channels. Current pricing and availability are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"Will S201MUC-K8 drop into a panel specified for S201MUC-K2?","answer":"Yes, the S201MUC-K8 shares the same 1-pole DIN-rail footprint, voltage ratings, and interrupting capacities as the S201MUC-K2. The only difference is the current rating — 8 A versus 2 A — so it physically fits without rewiring, but verify the downstream load is rated for 8 A protection."},{"question":"What compliance documentation is available for S201MUC-K8?","answer":"As an ABB S200MUC series MCB, the S201MUC-K8 typically carries CE marking for the European market and is designed to IEC/EN 60898-1 and IEC/EN 60947-2 standards. Specific RoHS and REACH declarations are available from ABB on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201MUC-K8","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/S201MUC-K8 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}