{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201-K30","brand":"ABB","brandSlug":"abb","productSlug":"S201-K30","canonicalUrl":"https://aoctrl.com/abb/S201-K30","factsUrl":"https://aoctrl.com/api/mcp/products/S201-K30","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S201-K30, 1-pole K-curve miniature circuit breaker, 30 A, 277 V AC, 6 kAIC, DIN rail mount, UL 1077 supplemental protector.","salesMarkdown":"The ABB S201-K30 is a single-pole, 30 A miniature circuit breaker with a K trip curve, rated for 277 V AC and a 6 kA interrupting capacity. It's listed as a supplemental protector under UL 1077 and CSA 22.2, meaning it's intended for branch-circuit protection inside equipment — not as a service entrance or feeder breaker. ## DIN rail integration and panel fit Single-pole width (17.5 mm) means it occupies one module position in a distribution board or control panel. The S200 series uses a captive screw terminal accepting up to 25 mm² conductor — strip length 12 mm, torque 2.0 Nm. No busbar bridging issues with adjacent S200 poles; the pin-and-fork busbar system is shared across the family. ## What the K-curve means for your load The K-curve is the deciding spec for this breaker. It's optimized for inductive loads — motors, transformers, solenoids, and power supplies — where the inrush current can briefly hit 8x to 12x the full-load rating. A standard C-curve (5x to 10x) might trip on the magnetizing inrush of a 30 A transformer; the K-curve's 10x to 14x magnetic trip window gives the headroom to pass that transient. The thermal element handles the 30 A continuous rating. ## Approvals and compliance documentation Listed under UL 1077 (Supplemental Protector) and CSA 22.2 No. 235. The UL 1077 listing means it's recognized for overcurrent protection within equipment — it's not a UL 489 branch-circuit breaker for service entrance use. CE marked for the European low-voltage directive. RoHS and REACH compliant per ABB's standard declaration, available on request with the order documentation package.","metaTitle":"S201-K30 30A 1-Pole K-Curve DIN Rail MCB, 277V AC","metaDescription":"S201-K30 30A, 1-pole, K-curve miniature circuit breaker. DIN rail mount, 277V AC, 6 kAIC. UL 1077 supplemental protector. Current lifecycle. Available to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"30","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":"$22.86","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201-K30/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the S201-K30?","answer":"The S201-K30 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What is the difference between S201-K30 and S204-C32?","answer":"The S204-C32 is a 4-pole, 32 A, C-curve breaker with a 10 kAIC rating, versus the S201-K30's single-pole, 30 A, K-curve at 6 kAIC. They are not drop-in replacements: the S204-C32 has four poles and a different trip curve. For a single-pole 30 A K-curve application, the S201-K30 is the correct part; the S204-C32 would require rewiring and a coordination review."},{"question":"What does the 6 kA interrupting rating mean?","answer":"The 6 kAIC at 277 V AC means the S201-K30 can safely interrupt a fault current up to 6,000 amps without welding contacts or causing arc flash. This is adequate for most equipment-level supplemental protection where the available fault current at the panel is below that threshold. For higher fault-current environments, a current-limiting upstream breaker or fuse is needed."},{"question":"What compliance documentation comes with the S201-K30?","answer":"The S201-K30 carries UL 1077 and CSA 22.2 listings, CE marking, and is RoHS/REACH compliant. Declaration of conformity and material compliance statements are provided with the order documentation package upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201-K30","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-K30 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}}