{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S803S-C20","brand":"ABB","brandSlug":"abb","productSlug":"S803S-C20","canonicalUrl":"https://aoctrl.com/abb/S803S-C20","factsUrl":"https://aoctrl.com/api/mcp/products/S803S-C20","rawCanonicalId":null},"summary":{"shortDescription":"ABB S803S-C20, 20 A, 3-pole, Trip Curve C, DIN rail miniature circuit breaker, 50 kA interrupting capacity at 400/690 VAC.","salesMarkdown":"The ABB S803S-C20 is a 20 A, 3-pole miniature circuit breaker with a Trip Curve C characteristic, meaning it trips between 5 and 10 times rated current — the standard choice for general-purpose loads like lighting, control transformers, and moderate motor inrush where you need short-circuit protection without nuisance tripping on startup. Its 50 kA interrupting rating at 400/690 VAC means it can safely clear a fault up to 50,000 amps without welding contacts or cascading damage upstream — a high-capacity rating that suits it for main distribution panels or subfeeds where fault current is substantial. Rated for 400/690 VAC and 375 VDC, it covers three-phase 400 V line-to-line and 690 V line-to-line applications, plus DC circuits up to 375 V — the DC rating is useful for control power or battery-backed loads. ## DIN rail integration and panel fit The 3-pole body occupies three modular units (3 x 17.5 mm = 52.5 mm) of rail space — plan your enclosure fill factor accordingly, especially when grouping with other breakers or contactors in a motor control center. Thermal-magnetic trip mechanism: the thermal bimetal handles overload protection (time-delayed), while the electromechanic solenoid handles short-circuit protection (instantaneous). No auxiliary electronics to fail, no power supply needed for the trip unit itself.","metaTitle":"ABB S803S-C20 20A 3-Pole C-Curve MCB, 50 kA","metaDescription":"ABB S803S-C20 20A 3-pole miniature circuit breaker, Trip Curve C, 50 kA interrupting capacity at 400/690 VAC. DIN rail mount. Current lifecycle stage. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Amps":"20","Type":"Trip Curve C","Poles":"3","title":"S803S-C20","Mounting":"DIN Rail","Volts AC":"230","description":"Circuit Breaker, 20A, 3P|Circuit Breaker, 20 Amp, 3-Pole, Tripping Characteristic: C, Thermal Tripping Mechanism for Overload Protection, Electromechanic Tripping Mechanism for Short Circuit Protection, Rated Operational Voltage: 400/690 Volts AC, 375 Volts DC, Rated Frequency: 50/60 Hz","lifecycle_stage":"current","Interrupt Rating AC":"50 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$160.02","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2d3bafaf068760ca0dca465952374e1a.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S803S-C20","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-C20 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}}