{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S261-C40","brand":"ABB","brandSlug":"abb","productSlug":"S261-C40","canonicalUrl":"https://aoctrl.com/abb/S261-C40","factsUrl":"https://aoctrl.com/api/mcp/products/S261-C40","rawCanonicalId":null},"summary":{"shortDescription":"ABB System pro M compact S261-C40, 40 A C-curve miniature circuit breaker, DIN rail mount, 0.14 kg.","salesMarkdown":"Its C-curve trip characteristic (5–10× In) makes it suitable for protecting circuits with moderate inrush — think lighting banks, small motor starters, or general-purpose socket outlets where the load isn't purely resistive but doesn't need the higher headroom of a D-curve.","metaTitle":"ABB S261-C40 DIN Rail MCB, 40A C-Curve","metaDescription":"ABB S261-C40 miniature circuit breaker, 40A C-curve, DIN rail mount. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Part #":"S261-C40","Weight":"0.14 kgs","Category":"Circuit Breakers","Sub Category":"Din Rail Mount Circuit Breakers","Top Category":"Circuit Breakers, Fuses & Protection","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$71.60","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S261-C40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy S261-C40 and how do I get a price?","answer":"The S261-C40 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"Will S261-C40 drop into a panel that was specified around S273-K40A without rewiring?","answer":"The S273-K40A is a 3-pole version (0.45 kg) while the S261-C40 is single-pole (0.14 kg). They share the same System pro M compact platform and DIN-rail footprint, but the pole count is different — you cannot directly substitute a single-pole for a three-pole without rewiring the circuit and possibly the busbar arrangement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S261-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/S261-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}}