{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-Z40","brand":"ABB","brandSlug":"abb","productSlug":"S202-Z40","canonicalUrl":"https://aoctrl.com/abb/S202-Z40","factsUrl":"https://aoctrl.com/api/mcp/products/S202-Z40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S202-Z40 miniature circuit breaker, 2-pole, Trip Curve Z, 40 A, 277 VAC, 6 kA interrupting rating, DIN rail mount.","salesMarkdown":"The Z curve trips between 2.5x and 5x rated current, designed to protect semiconductor loads and sensitive electronic equipment where standard B or C curves would allow too much through-fault energy before clearing. ## Interrupting rating and deployment Snaps onto standard DIN rail; occupies two pole spaces in the enclosure. The 40 A rating and Z-curve make this a candidate for UPS output branches, rectifier feeds, or control transformer primaries where the inrush is low but the short-circuit protection needs to be fast.","metaTitle":"ABB S202-Z40 MCB 2P Z 40A 277V, Trip Curve Z","metaDescription":"ABB S202-Z40 miniature circuit breaker, 2-pole, 40 A, Trip Curve Z, 277 VAC, 6 kA interrupting rating. Current lifecycle. Quoted 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 Z","Poles":"2","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0d8bd27d07e40b805d741ef77cbb8a3e.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-Z40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the S202-Z40?","answer":"The S202-Z40 is a 2-pole miniature circuit breaker rated 40 A, Trip Curve Z, 277 VAC, with a 6 kA interrupting rating."},{"question":"Where can I buy the S202-Z40?","answer":"The S202-Z40 is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"Will the S202-Z40 drop into a panel specified around the S204-B32?","answer":"No — the S204-B32 is a 4-pole, 32 A, Trip Curve B breaker with a 10 kA interrupting rating. The S202-Z40 is 2-pole, 40 A, Curve Z, and 6 kA. They are not form-fit-function interchangeable without rewiring and recalculating the fault-current coordination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-Z40","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-Z40 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}}