{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S204-K25","brand":"ABB","brandSlug":"abb","productSlug":"S204-K25","canonicalUrl":"https://aoctrl.com/abb/S204-K25","factsUrl":"https://aoctrl.com/api/mcp/products/S204-K25","rawCanonicalId":null},"summary":{"shortDescription":"ABB S204-K25 miniature circuit breaker, 4-pole, Trip Curve K, 25 A, 277 V AC, 10 kA interrupting rating, DIN rail mount.","salesMarkdown":"Curve K is designed for motor and inductive loads: its magnetic trip threshold (typically 8–12× In) is higher than a B or C curve, so it won't nuisance-trip on motor inrush but still protects the branch circuit against short circuits. That 25 A rating governs the maximum continuous load it can carry without thermal tripping — size your downstream conductor and load accordingly. ## Where it goes in the panel The 4-pole footprint takes four module-widths (about 72 mm) on the rail; plan your enclosure fill factor before you start wiring. Rated 277 V AC line-to-neutral, so it's at home in 480Y/277 V three-phase panels where you're protecting single-phase loads off one leg to neutral.","metaTitle":"ABB S204-K25 MCB 4P K 25A 277VAC DIN Rail","metaDescription":"ABB S204-K25 miniature circuit breaker, 4-pole, Curve K, 25 A, 277 V AC, 10 kA interrupting rating. DIN rail mount. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Amps":"25","Type":"Trip Curve K","Poles":"4","title":"S204-K25","Mounting":"DIN Rail","Volts AC":"277","description":"ABB S204-K25 MCB 4P K 25A 480Y/277|ABB S204K25","lifecycle_stage":"current","Interrupt Rating AC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d25129553c3ceb64d05ae39f52b591b6.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy S204-K25 and how do I get a price?","answer":"This part is sourced and quoted 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."},{"question":"What is the closest pin-compatible alternative to S204-K25 in this component family?","answer":"Within ABB's S200 series, the S204-B25 (Curve B) and S204-C25 (Curve C) share the same 4-pole, 25 A, DIN-rail footprint. The difference is the magnetic trip threshold: Curve B trips at 3–5× In (resistive/light loads), Curve C at 5–10× In (general-purpose), and Curve K at 8–12× In (motor/inductive loads). Choose the curve that matches your load type — don't swap curves without verifying the inrush characteristic of the downstream equipment."},{"question":"What is S204-K25's listed amps (25) on this component line?","answer":"The rated continuous current is 25 A. That's the maximum load the breaker can carry without thermal tripping under normal conditions."},{"question":"What is S204-K25's listed type (Trip Curve K) on this component line?","answer":"The Trip Curve K characteristic means the magnetic trip threshold is 8–12 times the rated current (25 A), so it's suited for motor and transformer loads that draw high inrush without nuisance-tripping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S204-K25","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/S204-K25 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}}