{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201-D4","brand":"ABB","brandSlug":"abb","productSlug":"S201-D4","canonicalUrl":"https://aoctrl.com/abb/S201-D4","factsUrl":"https://aoctrl.com/api/mcp/products/S201-D4","rawCanonicalId":null},"summary":{"shortDescription":"ABB S201-D4, 1-pole miniature circuit breaker, Trip Curve D, 4 A, 277 V AC, 6 kA interrupting rating, DIN-rail mount.","salesMarkdown":"The ABB S201-D4 is a 1-pole miniature circuit breaker (MCB) with a Trip Curve D characteristic, rated 4 A at 277 V AC. The D-curve means the magnetic trip is set to activate between 10x and 20x In (40–80 A instantaneously), designed for loads with high inrush current — motor starters, small transformers, solenoid valves, or lighting ballasts where a C-curve would nuisance-trip on startup. The 1-pole width (roughly 17.5 mm) keeps panel density high — you can pack 16 of these in a 12-inch rail segment. Rated for 277 V AC phase-to-neutral on a 480Y/277 V wye system, so it's a direct fit for North American lighting panels where each breaker feeds a single-phase branch.","metaTitle":"S201-D4 MCB 1P D 4A 277V AC DIN Rail","metaDescription":"S201-D4 miniature circuit breaker, 1-pole, Trip Curve D, 4 A, 277 V AC, 6 kA interrupting rating. DIN-rail mount. Current production. Request quote for pricing and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"4","Type":"Trip Curve D","Poles":"1","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$96.11","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/493006f74ee150d65e8c99c42ae5a73d.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201-D4/alternatives.json"},"ai":{"faq":[{"question":"What is S201-D4's listed amps and trip curve?","answer":"The S201-D4 is rated 4 A with a Trip Curve D characteristic — magnetic trip between 10x and 20x In, suited for loads with high inrush."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201-D4","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/S201-D4 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}}