{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202MUC-B20","brand":"ABB","brandSlug":"abb","productSlug":"S202MUC-B20","canonicalUrl":"https://aoctrl.com/abb/S202MUC-B20","factsUrl":"https://aoctrl.com/api/mcp/products/S202MUC-B20","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200MUC series, S202MUC-B20, 2-pole miniature circuit breaker, Trip Curve B, 20 A, 277 VAC / 500 VDC, 6 kA interrupting capacity.","salesMarkdown":"On a 277 VAC line it interrupts faults up to 6 kA; on DC circuits it handles 500 VDC and 10 kA interrupting capacity, covering most control-power and solar-combiner applications. The DIN-rail mount snaps into any standard 35 mm rail in a distribution board or sub-panel. The 277 VAC rating covers single-phase line-to-neutral in North American 277/480 Y systems; the 500 VDC rating handles string-level PV circuits or DC bus protection. Trip Curve B avoids nuisance tripping on lighting and resistive heater loads while still clearing a hard fault fast.","metaTitle":"ABB S202MUC-B20 S200MUC MCB, 2P B 20A, DIN Rail","metaDescription":"ABB S202MUC-B20 S200MUC miniature circuit breaker, 2-pole, Trip Curve B, 20 A, 277 VAC / 500 VDC, 6 kA interrupting capacity. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"20","Type":"Trip Curve B","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/85bbfae7ba5da26b4e96286e8247e601.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202MUC-B20/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of S202MUC-B20?","answer":"6 kA at 277 VAC and 10 kA at 500 VDC. That covers most commercial and light-industrial fault-current scenarios."},{"question":"Will S202MUC-B20 drop into a panel specified around S202M-B10?","answer":"Yes — same 2-pole DIN-rail footprint, same Trip Curve B family. The only difference is the amp rating: 20 A vs 10 A on the S202M-B10. No rewiring needed if the circuit load is within the 20 A rating."},{"question":"Where can I buy S202MUC-B20?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202MUC-B20","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-B20 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}}