{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MS450-50","brand":"ABB","brandSlug":"abb","productSlug":"MS450-50","canonicalUrl":"https://aoctrl.com/abb/MS450-50","factsUrl":"https://aoctrl.com/api/mcp/products/MS450-50","rawCanonicalId":null},"summary":{"shortDescription":"ABB MS450-50, 3-pole manual motor protector, adjustable 40.0 to 50.0 A, UL rated, 50 kA interrupting capacity.","salesMarkdown":"## What the ratings mean for fit The ABB MS450-50 is a 3-pole manual motor protector with an adjustable trip range of 40.0 to 50.0 A and a 50 kA interrupting capacity. That interrupting rating means it can safely clear a short-circuit fault up to 50,000 A without welding contacts or cascading damage upstream — critical for coordinating with a feeder breaker in a panel with high available fault current. The UL listing confirms it meets UL 508 requirements for motor protection, so it's accepted in North American panels without additional branch-circuit fusing when sized per code. ## Deployment context This manual motor protector mounts on a DIN rail inside a motor control center or panel enclosure. The 40–50 A adjustment range covers common motor sizes in that band. Ambient temperature range of -40 to 70 °C means it can sit in an unheated warehouse or a hot panel without derating.","metaTitle":"ABB MS450-50 Manual Motor Protector, 40-50 A, 50 kA","metaDescription":"ABB MS450-50 3-pole manual motor protector, 40.0 to 50.0 A adjustable, UL rated, 50 kA interrupting capacity. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"title":"MS450-50","description":"3 Pole Manual Motor Protector Str 40-50a 50ka|ABB 3 Pole, 40.0 To 50.0 Amp, Ul Rated, Ms450 Manual Motor Protector Age Temperature:-40 To 70 Deg C; Wire Strip Length","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7e43fb06f4d4acc3b71bac5591443686.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the trip adjustment range of ABB MS450-50?","answer":"The trip adjustment range is 40.0 to 50.0 A, set via the dial on the front of the protector."},{"question":"Does MS450-50 have a 50 kA interrupting rating?","answer":"Yes, the MS450-50 carries a 50 kA interrupting capacity, allowing it to clear high-fault currents without damage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/MS450-50","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/MS450-50 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}}