{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S203M-D63","brand":"ABB","brandSlug":"abb","productSlug":"S203M-D63","canonicalUrl":"https://aoctrl.com/abb/S203M-D63","factsUrl":"https://aoctrl.com/api/mcp/products/S203M-D63","rawCanonicalId":null},"summary":{"shortDescription":"ABB, S203M series, Molded Case Circuit Breaker, S203M-D63, thermal-magnetic trip, current production.","salesMarkdown":"It's the kind of part you spec into a distribution panel or a machine control cabinet for branch-circuit protection — overcurrent and short-circuit in one device, no add-on trip unit needed. ## What the 'D63' means for fit The D63 suffix indicates the trip curve (D) and the rated current (63 A). D-curve is the magnetic trip characteristic that handles high inrush loads — motor starting, transformer energization, welding equipment — without nuisance tripping on the initial surge. The 63 A thermal element covers the continuous load. ## Panel fit and wiring note This is a DIN-rail mount MCCB, same footprint as the rest of the S200/S200M family. No special adapter plate or backplate required — it's a snap-in swap for any S200-series breaker occupying the same 3-module width.","metaTitle":"S203M-D63 ABB Molded Case Circuit Breaker, current productio","metaDescription":"ABB S203M-D63 thermal-mag molded case circuit breaker. Current production status. Sourced to order. Request a quote for pricing and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Part #":"S203M-D63","Weight":"0.00 kgs","Category":"Circuit Breakers","Sub Category":"Molded Case Circuit Breakers","Top Category":"Circuit Breakers, Fuses & Protection","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$36.83","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S203M-D63/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for S203M-D63?","answer":"Submit an RFQ through this listing. We source and quote to order against your request; availability and current pricing are confirmed at quote time."},{"question":"Will S203M-D63 drop into a panel that was specified around SH203T-C16 without rewiring?","answer":"Both are DIN-rail mount S200-family breakers, same 3-module width and clip-on footprint, so the mechanical swap is straightforward. The electrical difference is the trip curve and rating: S203M-D63 is a 63 A D-curve, while SH203T-C16 is a 16 A C-curve. The panel's wire sizing and upstream protection must match the 63 A rating — you cannot just drop it in without checking the circuit design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S203M-D63","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/S203M-D63 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}}