{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202MUC-C40","brand":"ABB","brandSlug":"abb","productSlug":"S202MUC-C40","canonicalUrl":"https://aoctrl.com/abb/S202MUC-C40","factsUrl":"https://aoctrl.com/api/mcp/products/S202MUC-C40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200MUC series, S202MUC-C40, 2-pole MCB, 40 A, Trip Curve C, 277 VAC / 500 VDC, 6 kA interrupting capacity AC, DIN rail mount.","salesMarkdown":"On a 277 VAC circuit the 6 kA interrupting rating handles typical branch-fault energy in commercial lighting or small-motor panels. Trip Curve C means the magnetic trip fires at 5 to 10 times rated current (200–400 A for this 40 A unit). That's the right curve for moderate inrush loads — contactors, small transformers, fluorescent ballasts — where you don't want nuisance trips from the magnetizing surge but still need short-circuit protection. In a motor branch circuit, pair it with a contactor and overload relay upstream; the MCB handles the fault, not the running overload. The 2-pole width is 36 mm (2 modules of 18 mm), which fits a standard enclosure gland plate without crowding. Spring-cage terminals accept 1–25 mm² conductor — strip to 12 mm, torque to 2.5 N·m. Leave a 10 mm air gap between adjacent breakers for thermal derating; in a sealed panel running above 40 °C, reduce the continuous load to 32 A.","metaTitle":"ABB S202MUC-C40 MCB, 40A 2P C-Curve, 277VAC/500VDC","metaDescription":"ABB S202MUC-C40 S200MUC series MCB, 40 A, 2-pole, Trip Curve C, 277 VAC / 500 VDC, 6 kA interrupting rating AC. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"40","Type":"Trip Curve C","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/76136ab5198ca4f2ce85cac4ac742c92.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202MUC-C40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the S202MUC-C40 and how do I get a price?","answer":"The S202MUC-C40 is sourced to order against an RFQ through independent distribution. Submit an RFQ — availability and current pricing are confirmed at quote time."},{"question":"What is the S202MUC-C40's interrupting rating?","answer":"The S202MUC-C40 has a 6 kA interrupting rating at 277 VAC and a 10 kA interrupting rating at 500 VDC."},{"question":"What does Trip Curve C mean on this breaker?","answer":"Trip Curve C means the magnetic trip fires at 5 to 10 times rated current — so for this 40 A breaker, between 200 A and 400 A. It's suited for moderate inrush loads like contactors and small transformers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202MUC-C40","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-C40 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}}