{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S203P-K16","brand":"ABB","brandSlug":"abb","productSlug":"S203P-K16","canonicalUrl":"https://aoctrl.com/abb/S203P-K16","factsUrl":"https://aoctrl.com/api/mcp/products/S203P-K16","rawCanonicalId":null},"summary":{"shortDescription":"ABB, S200 series, Miniature Circuit Breaker, S203P-K16, 3-pole, 16 A, Trip Curve K, 277 VAC, 10 kA interrupting rating, DIN rail mount.","salesMarkdown":"The ABB S203P-K16 is a 3-pole miniature circuit breaker rated 16 A with a Trip Curve K characteristic, designed for DIN-rail mounting in distribution panels. The K curve is the key differentiator here — it's engineered for loads with high inrush currents like motors and transformers, tripping magnetically between 10 and 14 times rated current (160–224 A instantaneous trip). That's wider than a C curve (5–10×) but tighter than a D curve (10–20×), so it's a middle ground for industrial loads that need short-circuit protection without nuisance tripping on startup. The 10 kA interrupting rating at 277 VAC (phase-to-neutral) means this breaker can safely clear a fault up to 10,000 amps without welding contacts or cascading failure upstream. For a 16 A branch circuit in a 277/480 V panel, that's adequate for most commercial and light industrial installations where the available fault current stays under 10 kA. If your service entrance has a higher SCCR, you'll need a current-limiting upstream breaker or a higher-rated MCB. ## Integration note Snap-on DIN rail mounting, standard 3-module width (52.5 mm at 17.5 mm per pole). The S200 series uses tunnel terminals accepting up to 25 mm² conductor — sufficient for 16 A circuit wiring. No special busbar or comb required for the three poles; standard pin busbars fit the terminal layout.","metaTitle":"ABB S203P-K16 Miniature Circuit Breaker, 16A, Curve K, 3-Pol","metaDescription":"ABB S203P-K16 3-pole MCB, 16 A, Trip Curve K, 277 VAC, 10 kA interrupting rating. Current production. Sourced to order. Request RFQ for pricing and availability.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Amps":"16","Type":"Trip Curve K","Poles":"3","title":"S203P-K16","Mounting":"DIN Rail","Volts AC":"277","description":"Breaker, Miniature, 3-Pole, 16 Amp|Miniature Circuit Breaker; 3-Poles, 16 Amps, 480/277 VAC","lifecycle_stage":"current","Interrupt Rating AC":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$38.10 – $63.50","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9e3fae73a824069b2f38cf0e907fe866.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the S203P-K16's interrupting rating?","answer":"10 kA at 277 VAC. That's the maximum fault current the breaker can safely interrupt under standard conditions."},{"question":"Will the S203P-K16 drop into a panel specified for S203-D13?","answer":"Yes, same DIN-rail footprint, same 3-pole form factor, same terminal layout. The only difference is the trip curve — K vs D — so verify the load's inrush characteristic before swapping. For motor loads with moderate startup current, K is often a better fit than D."},{"question":"How do I get current pricing and availability for the S203P-K16?","answer":"Submit an RFQ through this listing. We source the part to order and confirm pricing and availability at quote time — no automated stock figures here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/S203P-K16","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/S203P-K16 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}