{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-K50","brand":"ABB","brandSlug":"abb","productSlug":"S202-K50","canonicalUrl":"https://aoctrl.com/abb/S202-K50","factsUrl":"https://aoctrl.com/api/mcp/products/S202-K50","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 series miniature circuit breaker, supplementary protector, 2-pole, Trip Curve K, 50 A, 6 kA interrupting at 277 VAC, DIN rail mount, UL 1077.","salesMarkdown":"It's a supplementary protector per UL 1077, meaning it's built for branch-circuit protection inside equipment, not as a main service disconnect. ## What Trip Curve K means for your load Trip Curve K is the middle ground between a B curve (light commercial loads) and a D curve (high-inrush motor circuits). The thermal-magnetic mechanism inside gives you a thermal trip for sustained overloads and a magnetic trip for fast short-circuit clearance. ## Where it goes and how it fits The finger-safe terminals accept up to the wire range you'd expect for 50 A (typically #14–#4 AWG copper). It's a panel-mount part: you'll see it inside a control cabinet feeding a motor starter, a power supply, or a heating load. No special mounting hardware needed, just a slot on the rail and a screwdriver for the terminals.","metaTitle":"S202-K50 Miniature Circuit Breaker 2P K 50A","metaDescription":"S202-K50 MCB, 2-pole, 50 A, Trip Curve K, 6 kA interrupting capacity, 277 VAC. UL 1077 supplementary protector. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"50","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":"$222.44","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7b0599cc6b7842d0be99baa27a8305eb.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-K50/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy S202-K50 and how do I get a price?","answer":"We source the S202-K50 to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ through the page and we'll get you a firm price and lead time."},{"question":"What is S202-K50's listed amps and interrupting rating?","answer":"The S202-K50 is rated at 50 A continuous with a 6 kA interrupting capacity at 277 VAC. The 6 kA figure is the fault current it can safely clear — match that against your available fault current at the panel."},{"question":"What compliance documentation does this breaker carry?","answer":"It's UL 1077 listed as a supplementary protector and CSA 22.2 No. 235 certified. That covers North American installations where branch-circuit overcurrent protection is already provided upstream."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-K50","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-K50 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}}