{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202MUC-K40","brand":"ABB","brandSlug":"abb","productSlug":"S202MUC-K40","canonicalUrl":"https://aoctrl.com/abb/S202MUC-K40","factsUrl":"https://aoctrl.com/api/mcp/products/S202MUC-K40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200MUC series, 2-pole K-curve MCB, 40 A, 277 VAC / 500 VDC, 6 kA / 10 kA interrupting capacity, DIN-rail mount.","salesMarkdown":"It handles 277 VAC at 6 kA interrupting capacity and 500 VDC at 10 kA — the DC rating is notably high for a compact MCB, making it a fit for DC distribution panels, UPS outputs, or solar combiner boxes where the string voltage stays under 500 VDC. The K-curve trips between 10× and 14× rated current, designed for inductive loads like motor starters and transformers that draw a high inrush without nuisance tripping on the branch circuit. The K-curve means magnetic trip occurs at 10–14× In (400–560 A instantaneous), so it rides through the inrush of a 15–20 kVA transformer or a bank of DC power supplies without opening. The 500 VDC rating with 10 kA interrupting capacity is the standout: most 2-pole MCBs in this footprint top out at 125 VDC or 250 VDC, so if you are protecting a 400 VDC bus in a telecom or industrial DC system, this part holds the arc without welding contacts. Two-pole width is 36 mm (2 modules of 18 mm each). The S200MUC family uses tunnel terminals accepting 1–25 mm² conductor — no special busbar or adapter needed for the 40 A feed. Wire strip length 12 mm, torque to 2.5 Nm. For DC circuits, observe polarity marking on the terminal; the internal arc chamber is polarized for DC interruption.","metaTitle":"ABB S202MUC-K40 MCB 2P K 40 A, 500 VDC","metaDescription":"ABB S202MUC-K40 miniature circuit breaker, 2-pole, K-curve, 40 A. Rated 277 VAC / 500 VDC, 6 kA / 10 kA interrupting capacity. DIN-rail mount. Active production, sourced 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 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":"$269.79","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6c646378f3b6dce18508e3cd470cdfee.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202MUC-K40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy S202MUC-K40 and how do I get a price?","answer":"The S202MUC-K40 is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is S202MUC-K40's listed amps and trip curve?","answer":"The S202MUC-K40 is rated 40 A with a K-curve trip characteristic (magnetic trip at 10–14× In)."},{"question":"Will S202MUC-K40 drop into a panel specified for S202M-C63 without rewiring?","answer":"Both mount on 35 mm DIN rail and share the same 2-pole, 36 mm footprint. The S202M-C63 is a 63 A C-curve breaker with a lower DC voltage rating (125 VDC vs 500 VDC). If the panel was wired for 63 A, the 40 A S202MUC-K40 cannot simply replace it without checking the load current and coordination — the K-curve also trips at a higher multiple of rated current, so the magnetic trip threshold is different."},{"question":"What compliance documentation does ABB provide for S202MUC-K40?","answer":"ABB provides a declaration of conformity to IEC/EN 60898-1 and IEC/EN 60947-2. The S200MUC series carries CE and UKCA marking. RoHS and REACH compliance declarations are available on request through the supply chain."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202MUC-K40","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-K40 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}}