{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S203-K25","brand":"ABB","brandSlug":"abb","productSlug":"S203-K25","canonicalUrl":"https://aoctrl.com/abb/S203-K25","factsUrl":"https://aoctrl.com/api/mcp/products/S203-K25","rawCanonicalId":null},"summary":{"shortDescription":"ABB S203-K25, 3-pole miniature circuit breaker, 25 A, Trip Curve K, 277 VAC, 10 kA interrupting rating, DIN-rail mount.","salesMarkdown":"## What this MCB does on the panel Curve K (10–14x In) gives it a higher magnetic trip threshold than B or C curves, making it suited for loads with moderate inrush like motor starters or transformer primaries where you need to ride through the start-up spike without nuisance tripping.","metaTitle":"S203-K25 Miniature Circuit Breaker, 3P, 25A, Curve K, DIN Ra","metaDescription":"S203-K25 MCB, 3-pole, 25 A, Trip Curve K, 277 VAC, 10 kA interrupting capacity. Current production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Amps":"25","Type":"Trip Curve K","Poles":"3","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$19.43","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S203-K25/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for S203-K25?","answer":"Submit an RFQ — this part is quoted to order through independent distribution, with pricing and availability confirmed at quote time."},{"question":"What is the closest pin-compatible alternative to S203-K25 in this component family?","answer":"Within the same ABB S200 series, the S203-C25 (25 A, Curve C) is the closest functional alternative — same 3-pole, 25 A, 10 kA interrupting rating, but with a lower magnetic trip threshold (5–10x In) better suited for general-purpose resistive and lighting loads rather than moderate-inrush applications."},{"question":"What is S203-K25's listed amps (25) on this component line?","answer":"The S203-K25 is rated 25 A continuous current."},{"question":"What is S203-K25's listed type (Trip Curve K) on this component line?","answer":"The S203-K25 uses Trip Curve K, with a magnetic trip range of 10–14 times the rated current (In)."},{"question":"What compliance documentation does this brand provide for S203-K25 (RoHS, REACH, UL, IEC)?","answer":"ABB typically provides RoHS, REACH, and CE declarations for the S200 series; UL and IEC 60898-1 certifications apply to this class. Specific documentation is available upon request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S203-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/S203-K25 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}}