{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S803S-D20","brand":"ABB","brandSlug":"abb","productSlug":"S803S-D20","canonicalUrl":"https://aoctrl.com/abb/S803S-D20","factsUrl":"https://aoctrl.com/api/mcp/products/S803S-D20","rawCanonicalId":null},"summary":{"shortDescription":"ABB S800S series MCB, S803S-D20, 3-pole, Trip Curve D, 20 A, 230 V AC, interrupting rating 50 kA, DIN rail mount.","salesMarkdown":"The ABB S803S-D20 is a 3-pole miniature circuit breaker from the S800S series, rated 20 A with Trip Curve D, designed for 230 V AC circuits and a 50 kA interrupting rating. ## Trip Curve D and deployment context The 20 A rating handles steady-state loads up to that current, while the D curve allows a brief multiple of that for inrush, then trips fast on hard faults. In a panel, the DIN-rail footprint means it clips onto the same profile as other S800S breakers, so a multi-pole distribution block stays aligned without adapters. ## Comparison with S803S-D63 The closest sibling in the same S800S family is the S803S-D63, which shares the same 3-pole DIN-rail form factor, 230 V AC rating, and 50 kA interrupting capacity, but is rated 63 A instead of 20 A. Both use Trip Curve D, so the selection between them is purely about the load current — the D20 for circuits up to 20 A, the D63 for circuits up to 63 A. They drop into the same panel layout without rewiring; the physical footprint is identical.","metaTitle":"ABB S803S-D20 MCB S800S 3P D 20A, 50 kA","metaDescription":"ABB S803S-D20 S800S series MCB, 3-pole, Trip Curve D, 20 A, 230 V AC, 50 kA interrupting rating. DIN rail mount. Current lifecycle. Sourced 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 D","Poles":"3","title":"S803S-D20","Mounting":"DIN Rail","Volts AC":"230","description":"Abb S803s-d20 Mcb S800s 3p D 20a|ABB S803S-D20","lifecycle_stage":"current","Interrupt Rating AC":"50 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7fedcfbc6e87f950646e55a85fef3864.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy S803S-D20 and how do I get a price?","answer":"The S803S-D20 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ to get a firm price and lead time."},{"question":"When sourcing S803S-D20, what's the closest functional second-source — S803S-D63?","answer":"The S803S-D63 is the closest functional sibling in the same S800S family, sharing the same 3-pole DIN-rail form factor, 230 V AC rating, and 50 kA interrupting capacity, but rated 63 A instead of 20 A. Both use Trip Curve D, so they are interchangeable in panel layout but not in ampacity — the D63 handles higher load current."},{"question":"What is S803S-D20's listed amps (20) on this component line?","answer":"The S803S-D20 is rated 20 A."},{"question":"What is S803S-D20's listed type (Trip Curve D) on this component line?","answer":"The S803S-D20 is a Trip Curve D miniature circuit breaker, designed for high-inrush loads such as motors and transformers."},{"question":"Will S803S-D20 drop into a panel that was specified around S803S-D63 without rewiring?","answer":"Yes, the S803S-D20 shares the same 3-pole DIN-rail footprint as the S803S-D63, so it drops into the same panel layout without rewiring. The only difference is the amp rating — 20 A vs 63 A — so the circuit must be sized for the lower current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S803S-D20","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-D20 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}}