{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202MUC-K63","brand":"ABB","brandSlug":"abb","productSlug":"S202MUC-K63","canonicalUrl":"https://aoctrl.com/abb/S202MUC-K63","factsUrl":"https://aoctrl.com/api/mcp/products/S202MUC-K63","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200MUC series, MCB, 2-pole, 63 A, Trip Curve K, 277 VAC / 500 VDC, 6 kA AC / 10 kA DC interrupting capacity, DIN-rail mount.","salesMarkdown":"The ABB S202MUC-K63 is a 2-pole miniature circuit breaker from the S200MUC series, rated at 63 A with a Trip Curve K characteristic. The K curve means the magnetic trip operates between 10× and 14× In (630 A to 882 A peak), which is deliberately set above the inrush of transformers, solenoid valves, and motor starters so the breaker holds through the start transient and only clears a hard fault. On a 277 VAC line-to-neutral or a 500 VDC battery string, the interrupting capacity is 6 kA AC and 10 kA DC respectively — that's the fault current the breaker can safely extinguish without welding contacts or rupturing the housing. The 2-pole configuration lets it switch both phase and neutral on a split-phase circuit, or both poles in a DC system where polarity isolation matters.","metaTitle":"ABB S202MUC-K63 S200MUC 2P K 63 A MCB, DIN Rail","metaDescription":"ABB S202MUC-K63 MCB, 63 A, Trip Curve K, 2-pole, 277 VAC / 500 VDC, 6 kA AC / 10 kA DC interrupt. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"63","Type":"Trip Curve K","Poles":"2","Mounting":"DIN Rail","Volts AC":"277","Volts DC":"500","lifecycle_stage":"current","Interrupt Rating AC":"6 kA","Interrupt Rating DC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a851c0e96b9366623cacf92b8e5e30d0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202MUC-K63/alternatives.json"},"ai":{"faq":[{"question":"What is the S202MUC-K63's interrupting capacity?","answer":"6 kA at 277 VAC and 10 kA at 500 VDC. The AC rating is suitable for most commercial and industrial distribution panels where the prospective fault current stays under 6 kA; the DC rating covers battery banks and solar combiner boxes up to 500 V."},{"question":"Will the S202MUC-K63 drop into a panel built for the S202M-B10?","answer":"Mechanically yes — both are 2-pole DIN-rail breakers with the same 36 mm module width and terminal layout. Electrically no: the K curve on this part trips magnetically at 10–14× In, while the B curve on the S202M-B10 trips at 3–5× In. If the panel's wiring and load are sized for 10 A on a B curve, dropping in a 63 A K curve will not provide the same fault protection and may not coordinate with downstream devices. The physical swap is possible; the protection scheme is not equivalent."},{"question":"Where can I buy the S202MUC-K63?","answer":"Sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead-time commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202MUC-K63","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/S202MUC-K63 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}}