{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-K20","brand":"ABB","brandSlug":"abb","productSlug":"S202-K20","canonicalUrl":"https://aoctrl.com/abb/S202-K20","factsUrl":"https://aoctrl.com/api/mcp/products/S202-K20","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S202-K20, 20 A, 2-pole, K-Curve, 277 V AC, 6 kAIC, UL 1077 supplemental protector, DIN rail mount.","salesMarkdown":"## Integrator note — S202-K20 The ABB S202-K20 is a 2-pole supplemental protector from the S200 series, rated 20 A with a K-Curve trip characteristic and a 6 kA interrupting capacity at 277 V AC. The K-Curve means it holds through moderate inrush — think motor starters, solenoid banks, or transformer primaries — without nuisance tripping, but still clears fast on a hard short. ## What the K-Curve means for fit The K-Curve is the deciding factor here. Compared to a C-Curve peer like the S202M-C20 (same 20 A, same poles, same interrupting rating), the K-Curve holds a wider magnetic trip window — typically 8–12x rated current versus 5–10x for C-Curve. That extra headroom matters when the load is a small motor or a bank of contactor coils that draw a brief surge on pickup. If your panel was spec'd around the S202M-C20 and the loads are mostly resistive or general-purpose, the K-Curve will still work, but you lose the tighter protection a C-Curve gives on lighting or heater circuits. For motor or inductive loads, the K-Curve is the better fit. ## Panel integration Two poles means it occupies two module widths (roughly 36 mm). No busbar adapter needed if you're feeding from a common bus — the S200 busbar system clips directly onto the line side.","metaTitle":"ABB S202-K20 20A K-Curve 2-Pole DIN Rail MCB, 277V","metaDescription":"ABB S202-K20 20A, K-Curve, 2-pole, 277V AC, 6 kAIC, UL 1077 supplemental protector. Current lifecycle. Sourced to order against RFQ.","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 K","Poles":"2","Mounting":"DIN Rail","Volts AC":"277","lifecycle_stage":"current","Interrupt Rating AC":"6 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$124.75","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-K20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the S202-K20?","answer":"The S202M-C20 is a 20 A, 2-pole, C-Curve breaker with the same 6 kA interrupting rating and DIN rail footprint. The difference is the trip curve: K-Curve holds higher inrush (8–12x rated) versus C-Curve (5–10x). Choose the K-Curve for motor or inductive loads; the C-Curve for general-purpose or resistive circuits."},{"question":"Where can I buy the S202-K20?","answer":"The S202-K20 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does ABB provide for the S202-K20?","answer":"The S202-K20 is UL 1077 listed and CSA 22.2 certified. ABB typically provides a Declaration of Conformity for CE marking and RoHS/REACH compliance documentation upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-K20","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-K20 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}}