{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-D40","brand":"ABB","brandSlug":"abb","productSlug":"S202-D40","canonicalUrl":"https://aoctrl.com/abb/S202-D40","factsUrl":"https://aoctrl.com/api/mcp/products/S202-D40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S202-D40 miniature circuit breaker, 2-pole, trip curve D, 40 A, 277 VAC, 6 kA interrupting rating, DIN-rail mount.","salesMarkdown":"The ABB S202-D40 is a 2-pole miniature circuit breaker with a D trip curve, rated 40 A at 277 VAC and a 6 kA interrupting capacity. That 40 A rating sits at the upper end of the S200 series, sized for a 7.5–10 kW motor depending on line voltage and duty. The 2-pole format breaks both line and neutral on a 277 VAC single-phase circuit (common in 480Y/277 V wye systems) or two phases of a delta supply. No neutral pole — it's a two-pole overcurrent device, not a switched neutral. ## Panel fit: S202-D40 vs. S202M-C25 The S202M-C25 (25 A, C curve) shares the same 2-pole DIN-rail footprint, 277 VAC rating, and 6 kA interrupting capacity. The deciding difference is the trip curve and amp rating: the S202-D40 handles a 40 A motor or transformer load where the C25 would trip on inrush; the C25 is the right choice for resistive or low-inrush circuits at 25 A. Both mount identically — no rework needed to swap them in the same enclosure slot. ## Integration note Snaps onto standard DIN rail; the S200 series uses a spring-loaded latch that releases with a flathead screwdriver. Terminal torque spec is 2–2.5 Nm for the cage clamps, accepting 1–25 mm² conductor. Leave at least 10 mm between adjacent breakers for heat dissipation at 40 A continuous.","metaTitle":"ABB S202-D40 2-Pole D-Curve MCB, 40 A, 277 VAC, 6 kA","metaDescription":"ABB S202-D40 miniature circuit breaker, 2-pole, trip curve D, 40 A, 277 VAC, 6 kA interrupting rating. Current lifecycle. 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 D","Poles":"2","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$137.46","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fcdfa5f354061d9cb3defbd9dd134dc1.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-D40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy S202-D40 and get a price?","answer":"The S202-D40 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"When sourcing S202-D40, what's the closest functional alternative — S202M-C25?","answer":"The S202M-C25 (25 A, C curve) shares the same 2-pole DIN-rail footprint and 6 kA interrupting rating, but the D curve on the S202-D40 is designed for higher inrush loads at 40 A. The C25 is a functional alternative only for lower-current, low-inrush circuits."},{"question":"What is S202-D40's interrupting rating?","answer":"The S202-D40 has a 6 kA interrupting rating at 277 VAC."},{"question":"Will S202-D40 drop into a panel specified around S202M-C25 without rewiring?","answer":"Yes — both breakers share the same 2-pole DIN-rail footprint and terminal layout, so the S202-D40 fits the same enclosure slot and busbar arrangement without panel modifications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-D40","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-D40 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}}