{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-Z20","brand":"ABB","brandSlug":"abb","productSlug":"S202-Z20","canonicalUrl":"https://aoctrl.com/abb/S202-Z20","factsUrl":"https://aoctrl.com/api/mcp/products/S202-Z20","rawCanonicalId":null},"summary":{"shortDescription":"ABB S202-Z20, 2-pole miniature circuit breaker, Trip Curve Z, 20 A, 277 VAC, 6 kA interrupting rating, DIN rail mount.","salesMarkdown":"## S202-Z20 — 2-pole Z-curve MCB for semiconductor and sensitive loads Rated 277 VAC with a 6 kA interrupting capacity, this breaker is sized for branch-circuit protection in 480Y/277 V wye systems. Trip Curve Z is the fastest standard magnetic trip characteristic available in the S200 series. It operates between 2× and 3× In (40–60 A for this 20 A breaker), compared to Curve C which trips at 5–10× In. This means the S202-Z20 clears a short-circuit fault in under 0.1 seconds at currents as low as 40 A — critical for protecting IGBT modules, diode bridges, and other power semiconductors that cannot survive even a single half-cycle of overcurrent. The trade-off is reduced tolerance for inrush. Motors, transformers, and capacitive loads that draw a brief startup surge above 40 A will cause nuisance tripping on a Z-curve breaker. Reserve this part for purely resistive or electronic loads where the peak fault current must be caught early. ## Panel integration — DIN-rail footprint The 2-pole housing occupies two 17.5 mm module widths (35 mm total) in the enclosure. Spring-cage terminals accept 0.5–25 mm² conductors; torque to 2.5 Nm per the terminal marking. The S200 series shares a consistent 17.5 mm per-pole footprint across all curve variants, so a panel originally specified with S202M-C63 or S203-D13 can accept the S202-Z20 in the same DIN-rail slot without rewiring the busbar or re-drilling the mounting plate.","metaTitle":"ABB S202-Z20 MCB, 2P Z 20A 277VAC, 6kA","metaDescription":"ABB S202-Z20 miniature circuit breaker, 2-pole, Trip Curve Z, 20 A, 277 VAC, 6 kA interrupting rating. DIN rail mount. Current lifecycle. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"20","Type":"Trip Curve Z","Poles":"2","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$124.66","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/434a1c3075cc4454d28125a1852b85f3.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-Z20/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-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/S202-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}}