{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202P-K40","brand":"ABB","brandSlug":"abb","productSlug":"S202P-K40","canonicalUrl":"https://aoctrl.com/abb/S202P-K40","factsUrl":"https://aoctrl.com/api/mcp/products/S202P-K40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S202P-K40, 2-pole miniature circuit breaker, 40 A, Trip Curve K, 277 VAC, 10 kA interrupting rating, DIN rail mount.","salesMarkdown":"The ABB S202P-K40 is a 2-pole miniature circuit breaker rated 40 A with Trip Curve K, designed for 277 VAC (480Y/277 V systems) and a 10 kA interrupting rating. The K curve provides magnetic trip between 8x and 12x In, making it suited for motor branch circuits and transformer primary protection where high inrush currents are expected — the breaker holds through the start surge but clears a hard fault fast. 40 A continuous rating on a 2-pole breaker means it handles up to 40 A per pole in a 277 V line-to-neutral or 480 V line-to-line circuit. Trip Curve K is the deciding factor for motor loads: magnetic trip starts at 8x rated current (320 A) and is guaranteed by 12x (480 A). This means a 40 A motor drawing 6x locked-rotor current (240 A) during start will not nuisance-trip, but a dead short exceeding 480 A clears in under 10 ms. For resistive or general-purpose loads, Curve C or B would trip faster — K is specifically for inductive inrush. DIN rail mount (per EN 60715) clips into any standard 35 mm rail in a distribution board or control panel. The 2-pole width is 36 mm (2 modules of 18 mm). For a panel OEM, the fill factor is one slot per pole; derating per IEC 60898 applies when ambient exceeds 30 °C or when multiple breakers are ganged without spacing.","metaTitle":"ABB S202P-K40 MCB 2P K 40A 480Y/277, 10 kA","metaDescription":"ABB S202P-K40 2-pole miniature circuit breaker, 40 A, Trip Curve K, 277 VAC, 10 kA interrupting rating. DIN rail mount. Active 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":"40","Type":"Trip Curve K","Poles":"2","title":"S202P-K40","Mounting":"DIN Rail","Volts AC":"277","description":"MCB 2P K 40A 480Y/277|ABB S202P-K40 MCB 2P K 40A 480Y/277","lifecycle_stage":"current","Interrupt Rating AC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$39.37","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e82be56258fc32acd88b2d7bbb76f911.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional second-source to S202P-K40?","answer":"The S202P-K32 is the same 2-pole K-curve breaker at 32 A instead of 40 A. It shares the same 277 VAC rating, 10 kA interrupting capacity, and DIN rail footprint. If the panel was specified around the S202P-K32, the S202P-K40 drops in without rewiring — same terminals, same busbar pitch, same trip curve shape — just a higher continuous rating. Verify the load current before swapping up."},{"question":"Will S202P-K40 drop into a panel that was specified around S202P-K32 without rewiring?","answer":"Yes. Both are 2-pole K-curve breakers on the same DIN rail footprint with identical terminal layout and busbar pitch. The only difference is the continuous rating: 40 A vs 32 A. No wiring changes needed — just confirm the downstream load is within 40 A."},{"question":"Where can I buy S202P-K40 and get current pricing?","answer":"The S202P-K40 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202P-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/S202P-K40 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}