{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S203MR-K6","brand":"ABB","brandSlug":"abb","productSlug":"S203MR-K6","canonicalUrl":"https://aoctrl.com/abb/S203MR-K6","factsUrl":"https://aoctrl.com/api/mcp/products/S203MR-K6","rawCanonicalId":null},"summary":{"shortDescription":"ABB S203MR-K6, 3-pole miniature circuit breaker, 6 A, Trip Curve K, 277 VAC, 10 kA interrupting rating, DIN rail mount.","salesMarkdown":"The ABB S203MR-K6 is a 3-pole miniature circuit breaker rated 6 A continuous, with a Trip Curve K characteristic that provides a magnetic trip threshold of 8 to 12 times the rated current — designed for motor and inductive load protection where inrush currents exceed standard B or C curve tolerances. The DIN rail mount footprint snaps into standard 35 mm top-hat rail, simplifying panel integration and allowing dense packing alongside other modular protection devices in the same enclosure. The 6 A rating governs continuous load capacity — this breaker is sized for branch circuits feeding motors, transformers, or lighting loads drawing up to 6 A. The Trip Curve K means the magnetic trip operates between 8× and 12× rated current, so it holds through motor starting inrush (typically 6–8× FLA) while still providing short-circuit protection. That makes it a natural fit for motor control centers and HVAC compressor circuits where a C-curve might nuisance-trip on startup. In a 277/480 V panel with available fault current below 10 kA, this breaker coordinates without requiring a current-limiting upstream device. Three poles means it switches all three phases simultaneously — required for three-phase motor circuits and polyphase loads. The DIN rail mount is the standard European and increasingly North American panel format; it clips into the rail without screws and releases via a slot-head driver for reconfiguration.","metaTitle":"ABB S203MR-K6 MCB, 6 A, 3-Pole, Curve K, 277 VAC, 10 kA","metaDescription":"ABB S203MR-K6 miniature circuit breaker, 6 A, 3-pole, Trip Curve K, 277 VAC, 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":["Miniature Circuit Breakers (MCB)"],"specifications":{"Amps":"6","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0efd210b1c12ca9d393695e492d3622a.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S203MR-K6/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of the S203MR-K6?","answer":"The S203MR-K6 has a 10 kA interrupting rating at 277 VAC, meaning it can safely clear fault currents up to 10,000 A at that voltage without damage or cascading failure."},{"question":"What does Trip Curve K mean on this breaker?","answer":"Trip Curve K means the magnetic trip operates at 8 to 12 times the rated current — designed for motor and inductive loads where inrush currents are higher than resistive loads but lower than what a D-curve would handle. It reduces nuisance tripping on motor start while still providing short-circuit protection."},{"question":"Where can I buy the S203MR-K6?","answer":"The S203MR-K6 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time figure is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S203MR-K6","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/S203MR-K6 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}}