{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201-K3","brand":"ABB","brandSlug":"abb","productSlug":"S201-K3","canonicalUrl":"https://aoctrl.com/abb/S201-K3","factsUrl":"https://aoctrl.com/api/mcp/products/S201-K3","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S201-K3, 1-pole miniature circuit breaker, 3 A, Trip Curve K, 277 V AC, 6 kA interrupting capacity, DIN rail mount, UL 1077 supplemental protector.","salesMarkdown":"The S201-K3 is a 1-pole miniature circuit breaker rated 3 A continuous at 277 V AC, with a K-curve trip characteristic and 6 kA interrupting capacity. It's a UL 1077 supplemental protector — meaning it's listed for branch-circuit back-up protection inside equipment, not as a service-entrance main breaker. At 3 A, this is sized for a small motor or control transformer secondary, not a feeder. Single-pole width means it takes one module slot — 17.5 mm — so it fits tight layouts. The S200 series shares a common busbar and accessory footprint across the line, so you can mix K-curve and other curves on the same rail without extra adapters. Terminal torque is typically 2–2.5 Nm; strip length around 10 mm for the cage clamp.","metaTitle":"ABB S201-K3 3A K-Curve Miniature Circuit Breaker, 1-Pole, 27","metaDescription":"ABB S201-K3 3A, 1-pole K-curve MCB, 277V AC, 6 kAIC. UL 1077 supplemental protector for motor and inductive loads. Current production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"3","Type":"Trip Curve K","Poles":"1","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201-K3/alternatives.json"},"ai":{"faq":[{"question":"What is the S201-K3's interrupting rating?","answer":"6 kA at 277 V AC, per UL 1077. That's the maximum fault current it can safely clear without failing."},{"question":"What does Trip Curve K mean on this breaker?","answer":"K-curve means the magnetic trip operates at 10 to 14 times the rated current (30–42 A for the 3 A version). It's chosen for loads with high inrush — motors, transformers, solenoids — so it doesn't trip on startup but still clears a short fast."},{"question":"Where can I buy the S201-K3?","answer":"We source it to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — send the RFQ and we'll quote the line."},{"question":"What compliance documentation does ABB provide for the S201-K3?","answer":"The part carries UL 1077 and CSA 22.2 approvals. Standard documentation includes the UL listing mark on the nameplate and a CSA certification. RoHS and REACH compliance is typical for the S200 series, but confirm the specific declaration with the order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201-K3","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/S201-K3 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}}