{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-C40","brand":"ABB","brandSlug":"abb","productSlug":"S202-C40","canonicalUrl":"https://aoctrl.com/abb/S202-C40","factsUrl":"https://aoctrl.com/api/mcp/products/S202-C40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S202-C40 miniature circuit breaker, 2-pole, 40 A, Trip Curve C, 277 VAC, 6 kA interrupting rating, DIN rail mount.","salesMarkdown":"The S202-C40 is a 2-pole miniature circuit breaker rated 40 A with a Trip Curve C characteristic, meaning it trips between 5 and 10 times rated current — the standard choice for moderate inrush loads like small motors, transformers, and lighting banks where you need short-circuit protection without nuisance tripping on startup. ## How it sits against the S202M-B10 The S202M-B10 is the same 2-pole DIN-rail platform but rated 10 A with a B curve (3–5× In), designed for resistive loads and longer cable runs where you want lower magnetic trip thresholds. It shares the same 6 kA interrupting rating and 277 VAC line-to-neutral voltage, so it physically swaps into the same panel position — but the 40 A C-curve on the S202-C40 handles motor and transformer inrush that would trip a B-curve breaker on startup. If your BOM was specified around the S202M-B10 and you're looking at the S202-C40, check the load's inrush profile; the C curve is more forgiving for inductive starts, but the 40 A rating must match your conductor sizing and load current.","metaTitle":"S202-C40 Miniature Circuit Breaker, 2P, 40A, Curve C","metaDescription":"S202-C40 miniature circuit breaker, 2-pole, 40 A, Trip Curve C, 277 VAC, 6 kA interrupting rating. DIN rail mount. Current lifecycle. 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 C","Poles":"2","title":"S202-C40","Mounting":"DIN Rail","Volts AC":"277","description":"Miniature Circuit Breaker, 2P, 40A|Miniature Circuit Breaker, 2 Pole, 40 Amp, 480Y/277 Volts AC","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d8ea123cce9cf6ebc7ccde0c09dc0578.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How do I get current pricing and availability for S202-C40?","answer":"We source the S202-C40 to order against an RFQ. Send your line item and quantity, and we'll confirm current landed cost and lead time at quote — no automated pricing on this listing."},{"question":"When sourcing S202-C40, what's the closest functional second-source — S202M-B10?","answer":"The S202M-B10 is the closest sibling in the same 2-pole DIN-rail family, but it's a 10 A B-curve breaker. It physically swaps into the same panel position but serves a different load profile — resistive or long cable runs, not motor or transformer inrush. The S202-C40's 40 A C-curve is the correct choice for inductive loads up to that rating."},{"question":"What is S202-C40's listed amps (40) on this component line?","answer":"The S202-C40 is rated 40 A continuous current at 40 °C ambient, per its thermal-magnetic trip characteristic. That's the maximum steady-state load it can carry without tripping on thermal overload."},{"question":"What is S202-C40's listed type (Trip Curve C) on this component line?","answer":"Trip Curve C means the magnetic trip operates between 5 and 10 times rated current (200–400 A for this 40 A breaker). It's the standard choice for moderate inrush loads — small motors, transformers, lighting banks — where you need short-circuit protection without nuisance tripping on startup."},{"question":"Will S202-C40 drop into a panel that was specified around S202M-B10 without rewiring?","answer":"Yes — both breakers share the same 2-pole DIN-rail footprint and 277 VAC rating, so the S202-C40 physically clips into the same rail position and connects to the same bus bars. But the 40 A C-curve is a different protection profile from the 10 A B-curve; verify your load current and conductor sizing before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-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/S202-C40 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}}