{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-K8","brand":"ABB","brandSlug":"abb","productSlug":"S202-K8","canonicalUrl":"https://aoctrl.com/abb/S202-K8","factsUrl":"https://aoctrl.com/api/mcp/products/S202-K8","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 series, S202-K8, 2-pole miniature circuit breaker, 8 A, Trip Curve K, 277 VAC, 6 kA interrupting rating, DIN rail mount, UL 1077 supplemental protector.","salesMarkdown":"It operates at 277 VAC and carries a 6 kA interrupting rating under UL 1077, classifying it as a supplemental protector rather than a branch-circuit rated device. The DIN-rail footprint means it snaps into standard 35 mm rail inside a control panel or distribution board. It is not a general-purpose curve; use it where a standard C-curve would nuisance-trip on startup but a D-curve would be too slow for conductor protection. That is adequate for most control-panel secondary circuits fed from a transformer or a 277/480 V lighting panel, but it is not a main service entrance device — UL 1077 supplemental protectors are intended for downstream branch or component protection, not as the service disconnect. Two poles means the breaker simultaneously opens both line conductors. On a 277 V single-phase circuit (line-to-neutral on a 480Y/277 V system), only one pole would be used; the second pole can serve as a switched neutral or remain unused. For a 480 V line-to-line load, both poles are needed. The S202-K8 carries UL 1077 recognition as a supplemental protector and CSA 22.2 certification. These are the North American approvals that allow installation in UL-listed control panels and industrial equipment. The part is also RoHS and REACH compliant, which covers the EU material restrictions — documentation for all of these is available from the manufacturer upon request.","metaTitle":"S202-K8 ABB S200 2-Pole 8A K-Curve Miniature Circuit Breaker","metaDescription":"ABB S202-K8 2-pole 8A K-curve MCB, 277 VAC, 6 kAIC, UL 1077 supplemental protector. Current production, sourced to order. Request RFQ for pricing and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"8","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":"$77.18","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-K8/alternatives.json"},"ai":{"faq":[{"question":"What is the S202-K8's interrupting rating and what does it mean?","answer":"The S202-K8 has a 6 kA interrupting rating at 277 VAC. This means it can safely clear a fault current up to 6,000 A without damage, suitable for downstream branch or component protection in control panels."},{"question":"What does Trip Curve K mean on the S202-K8?","answer":"Trip Curve K means the magnetic trip operates between 8 and 12 times the rated current (64 A to 96 A for this 8 A breaker). It is designed for loads with moderate inrush such as motor starters, transformers, and solenoid valves."},{"question":"Will the S202-K8 drop into a panel specified for the S203-C8?","answer":"No, the S203-C8 is a 3-pole breaker, while the S202-K8 is 2-pole. The footprint and wiring differ — the S202-K8 will not directly replace a 3-pole device without rewiring and possibly changing the DIN-rail assembly."},{"question":"Where can I buy the S202-K8 and get current pricing?","answer":"The S202-K8 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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-K8","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-K8 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}}