{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S203-K32","brand":"ABB","brandSlug":"abb","productSlug":"S203-K32","canonicalUrl":"https://aoctrl.com/abb/S203-K32","factsUrl":"https://aoctrl.com/api/mcp/products/S203-K32","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 series, S203-K32, miniature circuit breaker, 32 A, 3-pole, Trip Curve K, 480Y/277 VAC, 6 kAIC, DIN rail mount.","salesMarkdown":"Rated 480Y/277 VAC with a 6 kA interrupting capacity, it mounts on standard DIN rail for panel integration. It's a supplemental protector per UL 1077 and CSA 22.2 — meaning it backs up a branch-circuit overcurrent device rather than serving as the sole disconnect. The 32 A rating and Trip Curve K target inductive loads — motors, transformers, solenoids — where inrush current can be several times the full-load amps. Curve K trips magnetically at 8 to 12 times rated current, so it holds through motor start-up without nuisance tripping, unlike a Curve C (5 to 10x) that might drop out on a hard start. The 3-pole configuration handles three-phase circuits, common for 480Y/277 VAC motor branch feeds. ## Compliance documentation Listed under UL 1077 and CSA 22.2 as a supplemental protector. That means it's recognized for use within equipment (panelboards, control panels, machine disconnects) but not as a branch-circuit overcurrent device under NEC Article 240. The S200 series typically carries CE marking for IEC 60898 / 60947-2 compliance as well, though the evidence here confirms the North American approvals directly.","metaTitle":"S203-K32 Miniature Circuit Breaker, 32A, 3P, Trip Curve K, D","metaDescription":"S203-K32 miniature circuit breaker, 32 A, 3-pole, Trip Curve K, 480Y/277 VAC, 6 kAIC. S200 series supplemental protector. UL 1077. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Amps":"32","Type":"Trip Curve K","Poles":"3","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$22.86","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S203-K32/alternatives.json"},"ai":{"faq":[{"question":"What is S203-K32's amp rating and trip curve?","answer":"It is rated 32 A with Trip Curve K, meaning it allows 8 to 12 times the rated current for magnetic trip — suited for motor and transformer branch protection where inrush is high."},{"question":"Will S203-K32 drop into a panel specified for S203-C8?","answer":"Yes, same 3-pole DIN rail footprint and 480Y/277 VAC rating, so it fits mechanically. But the trip curve and amp rating differ: S203-C8 is 8 A with Curve C (5 to 10x inrush). Do not substitute without verifying the branch circuit's overload and short-circuit protection requirements."},{"question":"What compliance documentation does S203-K32 carry?","answer":"It is listed under UL 1077 and CSA 22.2 as a supplemental protector. The S200 series also typically meets CE marking for IEC standards."},{"question":"Where can I buy S203-K32 and what is the lead time?","answer":"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 estimate is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S203-K32","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/S203-K32 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}}