{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-K5","brand":"ABB","brandSlug":"abb","productSlug":"S202-K5","canonicalUrl":"https://aoctrl.com/abb/S202-K5","factsUrl":"https://aoctrl.com/api/mcp/products/S202-K5","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S202-K5, 5 A, 2-pole, K-curve, 277 VAC, 6 kAIC, DIN rail, UL 1077 supplemental protector.","salesMarkdown":"## What this 5 A K-curve breaker does in the panel The ABB S202-K5 is a 2-pole supplemental protector from the S200 series, rated 5 A at 277 VAC with a K-curve trip characteristic and 6 kA interrupting capacity. ## K-curve vs. other trip curves — the real difference The K-curve is the deciding factor here. Compared to a C-curve breaker of the same frame (e.g., S202M-C10), the K-curve has a wider magnetic-trip band — typically 8–12× rated current vs. 5–10× for C-curve. That extra headroom means the S202-K5 holds through the higher inrush of a motor start or a transformer energization where a C-curve might trip. The trade-off: the K-curve is not a motor-circuit protector (MCP) — it is a supplemental protector per UL 1077, not a branch-circuit rated device. Use it for component-level protection inside a control panel, not as the sole overcurrent device feeding a motor from a distribution panel. The 2-pole footprint occupies two module widths (36 mm). Rated 277 VAC line-to-neutral or 480Y/277 VAC three-phase. Interrupting capacity is 6 kA at 277 VAC, which is adequate for most control-panel fault-current levels below that threshold. Listed to UL 1077 and CSA 22.2 — these are the standards that define it as a supplemental protector for use within an enclosure, not a branch-circuit main breaker. That distinction matters for the panel's SCCR calculation: the S202-K5 can be used as a component in a listed assembly, but the overall short-circuit current rating of the panel must be verified per UL 508A.","metaTitle":"S202-K5 5A K-Curve 2-Pole DIN Rail Circuit Breaker","metaDescription":"S202-K5 UL 1077 supplemental protector, 5 A, 277 VAC, K-curve, 6 kAIC, DIN rail. Current lifecycle stage. Sourced 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":"5","Type":"Trip Curve K","Poles":"2","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$192.84","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-K5/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy S202-K5 and how do I get a price?","answer":"The S202-K5 is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing — no stock count or price figure is published here."},{"question":"Will S202-K5 drop into a panel that was specified around S202M-C10 without rewiring?","answer":"Mechanically yes — both are 2-pole DIN-rail breakers in the same S200 frame, so the physical footprint and bus-bar connection points are identical. Electrically no — the S202-K5 is 5 A K-curve, while the S202M-C10 is 10 A C-curve. Replacing one with the other changes both the ampacity and the trip characteristic; the circuit must be re-evaluated for the new settings."},{"question":"What compliance documentation does ABB provide for S202-K5?","answer":"The S202-K5 carries UL 1077 and CSA 22.2 approvals. For RoHS and REACH compliance documentation, contact the supplier at quote time — those declarations are typically provided with the shipment or on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-K5","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/S202-K5 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}}