{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S202-K4","brand":"ABB","brandSlug":"abb","productSlug":"S202-K4","canonicalUrl":"https://aoctrl.com/abb/S202-K4","factsUrl":"https://aoctrl.com/api/mcp/products/S202-K4","rawCanonicalId":null},"summary":{"shortDescription":"ABB S200 Series, S202-K4, 2-pole supplemental protector, 4 A, K-curve, 277 V AC, 6 kA interrupting rating, DIN rail mount.","salesMarkdown":"## What the K-curve means for your circuit The S202-K4 is a 2-pole supplemental protector from ABB's S200 series, rated 4 A at 277 V AC with a 6 kA interrupting capacity. The K-curve trips between 8 and 12 times rated current — faster than a D-curve on moderate overloads but slower than a B or C curve, which makes it a common choice for motor branch circuits, transformer primaries, and inductive loads where you need to ride through inrush without nuisance tripping. It's listed under UL 1077 as a supplemental protector, not a branch-circuit rated device, so it's intended for internal panel protection downstream of a listed branch breaker. Two-pole form factor means it occupies two module widths — 36 mm total — which is the same footprint as the S202M-C10 and other S200 2-pole siblings, so swapping between them requires no rail repositioning or busbar rework.","metaTitle":"S202-K4 ABB S200 Series 4A K-Curve 2-Pole Miniature Circuit","metaDescription":"ABB S202-K4 supplemental protector, 4A, 480Y/277V AC, 6 kAIC, K-curve, 2-pole, DIN rail. UL 1077 listed. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Amps":"4","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":"$16.66","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1b888e9d473400bd32917551d1de57a0.pdf","sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/S202-K4/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of S202-K4?","answer":"6 kA at 277 V AC, which is typical for supplemental protectors in this class — adequate for most control panel fault currents downstream of a branch breaker."},{"question":"Will S202-K4 drop into a panel that was specified around S202M-C10?","answer":"Yes — same 2-pole DIN-rail footprint, same terminal spacing, same busbar compatibility. The difference is the trip curve: K-curve on this part versus C-curve on the S202M-C10, so verify the load's inrush characteristic before swapping."},{"question":"What compliance documentation does S202-K4 carry?","answer":"UL 1077 listed and CSA 22.2 certified. RoHS and REACH compliance documentation is available from the manufacturer."},{"question":"How do I get current pricing and availability for S202-K4?","answer":"Submit an RFQ through the distributor. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S202-K4","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-K4 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}}