{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S802S-K40","brand":"ABB","brandSlug":"abb","productSlug":"S802S-K40","canonicalUrl":"https://aoctrl.com/abb/S802S-K40","factsUrl":"https://aoctrl.com/api/mcp/products/S802S-K40","rawCanonicalId":null},"summary":{"shortDescription":"ABB S802S-K40 High Performance Miniature Circuit Breaker, 2 Pole, 40 Amp, Trip Curve K, 230 VAC, 50 kA interrupting rating, DIN rail mount.","salesMarkdown":"## What the 40 A and Curve K mean for your panel The ABB S802S-K40 is a 2-pole, 40 A high-performance miniature circuit breaker (MCB) with a Trip Curve K characteristic, rated for 230 VAC and a 50 kA interrupting capacity. The 40 A rating means it protects branch circuits supplying motor loads, transformers, or other inductive equipment where the inrush current is higher than a resistive load — that is what Curve K is designed for. The 50 kA interrupting rating at 230 VAC gives you substantial fault-current headroom, so it can safely clear a short-circuit without upstream coordination issues in most distribution panels. Trip Curve K trips magnetically between 8 and 12 times the rated current (320–480 A instantaneous), which keeps it from nuisance-tripping on motor start-up while still protecting the conductors. That makes it a natural fit for a motor control center or a panel feeding pumps, compressors, or conveyors — the kind of load where a B-curve would trip on inrush and a D-curve might not clear a fault fast enough. The 2-pole width (2 modules) means it occupies two 18 mm slots in the enclosure — no special adapter needed. Terminal capacity accepts up to 35 mm² conductor, so it handles the feed-through for a 40 A motor circuit without a separate distribution block.","metaTitle":"S802S-K40 ABB High Perf MCB, 40A 2P Curve K, 50kA","metaDescription":"ABB S802S-K40 high performance MCB, 40A, 2-pole, Trip Curve K, 230 VAC, 50 kA interrupting. Current lifecycle. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"40","Type":"Trip Curve K","Poles":"2","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/0f37e0d2018b9ed196412997de9fb4a4.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S802S-K40/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the S802S-K40 and get a price?","answer":"The S802S-K40 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the interrupting rating of the S802S-K40?","answer":"The S802S-K40 has a 50 kA interrupting rating at 230 VAC, which means it can safely clear a short-circuit fault up to 50,000 amps without damage to the panel or upstream equipment."},{"question":"Will the S802S-K40 drop into a panel specified for the S202M-B10?","answer":"No — the S202M-B10 is a 10 A, Curve B, 6 kA interrupting MCB, while the S802S-K40 is a 40 A, Curve K, 50 kA interrupting device. They share the same 2-pole DIN-rail footprint, but the ratings are completely different. The S202M-B10 is for lighting or resistive loads; the S802S-K40 is for motor or inductive loads. Do not substitute without verifying the circuit design."},{"question":"What compliance documentation is available for the S802S-K40?","answer":"The S802S-K40 is a UL 489 listed, CSA certified, and CE marked miniature circuit breaker. RoHS and REACH compliance documentation is available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S802S-K40","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/S802S-K40 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}}