{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S201P-Z20","brand":"ABB","brandSlug":"abb","productSlug":"S201P-Z20","canonicalUrl":"https://aoctrl.com/abb/S201P-Z20","factsUrl":"https://aoctrl.com/api/mcp/products/S201P-Z20","rawCanonicalId":null},"summary":{"shortDescription":"ABB System Pro M S201P-Z20, 1-pole miniature circuit breaker, Trip Curve Z, 20 A rated current, 277 VAC, 10 kA interrupting capacity, DIN rail mount, UL 1077 supplementary protector.","salesMarkdown":"## Supplementary protector for sensitive electronic loads Curve Z trips between 2x and 3x rated current — tighter than Curve C (5-10x) or D (10-20x) — so it catches short-duration overcurrents from control transformers, PLC power supplies, and DC bus capacitors without false trips, while still clearing a hard fault at 10 kA interrupting capacity at 277 VAC. Mounts on standard DIN rail in a control panel or distribution board; finger-safe terminals accept multi-function wiring for panel OEMs and field service alike. ## What the Trip Curve Z means for your BOM line Trip Curve Z is the key spec that differentiates this part from a standard MCB — its magnetic trip threshold of 2-3x In (40-60 A for this 20 A unit) means it protects circuits with low inrush but high sensitivity to overcurrent, such as 24 VDC control loops, analog I/O cards, and measurement transducers. Rated 20 A continuous, this 1-pole unit occupies one module width on the DIN rail, leaving space for additional poles or auxiliary contacts in the same enclosure. Listed to UL 1077 (Supplementary Protector) and CSA 22.2 No. 235, so it is accepted for branch-circuit protection in UL 508A industrial control panels and similar North American installations where a full UL 489 breaker is not required.","metaTitle":"ABB S201P-Z20 MCB, 1P Z 20A, 10kA, UL 1077 Supplementary Pro","metaDescription":"ABB S201P-Z20 miniature circuit breaker, 1-pole, Trip Curve Z, 20A, 277VAC, 10kA interrupting. UL 1077 supplementary protector. Current lifecycle. Order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Amps":"20","Type":"Trip Curve Z","Poles":"1","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e71323c98d814ae17149789dd7acbe25.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S201P-Z20/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for S201P-Z20?","answer":"Submit an RFQ through this listing; pricing and stock are confirmed at quote time through independent distribution channels."},{"question":"What does Trip Curve Z mean for my application?","answer":"Trip Curve Z trips magnetically at 2-3x rated current (40-60 A for this 20 A unit), making it suitable for protecting sensitive electronic loads like PLC power supplies, control transformers, and instrumentation loops where standard Curve C breakers would nuisance-trip on inrush."},{"question":"What compliance documentation does ABB provide for S201P-Z20?","answer":"The S201P-Z20 is UL 1077 and CSA 22.2 No. 235 listed as a supplementary protector, suitable for North American industrial control panels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S201P-Z20","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/S201P-Z20 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}}