{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S803S-K20","brand":"ABB","brandSlug":"abb","productSlug":"S803S-K20","canonicalUrl":"https://aoctrl.com/abb/S803S-K20","factsUrl":"https://aoctrl.com/api/mcp/products/S803S-K20","rawCanonicalId":null},"summary":{"shortDescription":"ABB S803S-K20, S803S series, miniature circuit breaker, 20 A, 3-pole, trip curve K, 50 kA interrupting capacity, DIN rail mount.","salesMarkdown":"The K curve provides a magnetic trip threshold of 10–14× In, making it suited for motor and transformer circuits where inrush current must pass without nuisance tripping. The interrupting rating of 50 kA at 400/690 VAC gives headroom for high-fault installations. Rated operational voltage is 400/690 VAC at 50/60 Hz and 375 VDC. The thermal-magnetic trip mechanism handles overload protection via the thermal element and short-circuit protection via the electromechanical element.","metaTitle":"S803S-K20 ABB S803S MCB, 20A 3-Pole Curve K, 50 kA","metaDescription":"ABB S803S-K20 miniature circuit breaker, 20 A, 3-pole, trip curve K, 50 kA interrupting capacity at 400/690 VAC. 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":"20","Type":"Trip Curve K","Poles":"3","Mounting":"DIN Rail","Volts AC":"230","lifecycle_stage":"current","Interrupt Rating AC":"50 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/385fe19101dcca71562a0d69178a0025.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S803S-K20/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of the S803S-K20?","answer":"The S803S-K20 has a 50 kA interrupting rating at 400/690 VAC, which provides high fault-current capacity for industrial panel coordination studies."},{"question":"What does trip curve K mean on this breaker?","answer":"Trip curve K means the magnetic trip operates at 10–14 times the rated current (200–280 A for this 20 A breaker), designed to handle motor and transformer inrush without nuisance tripping."},{"question":"Where can I buy the S803S-K20?","answer":"The S803S-K20 is available to order through independent distribution. Submit an RFQ for current pricing and availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S803S-K20","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/S803S-K20 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}}