{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MS450-50E","brand":"ABB","brandSlug":"abb","productSlug":"MS450-50E","canonicalUrl":"https://aoctrl.com/abb/MS450-50E","factsUrl":"https://aoctrl.com/api/mcp/products/MS450-50E","rawCanonicalId":null},"summary":{"shortDescription":"ABB MS450-50E manual motor protector, 3-phase, 40-50 A FLA range, 600 V rated, UL508, Trip Class 10/20.","salesMarkdown":"## 40-50 A FLA range, 3-phase, UL508 The ABB MS450-50E is a manual motor protector (MMP) covering a 40.00-50.00 FLA range, 3-phase, rated 600 V under UL508. It integrates short-circuit protection and phase-failure detection into a single device, eliminating the need for separate fuses or overload relays on the line side. Trip class is selectable between 10 and 20 — Class 10 for faster protection on motors with short acceleration times, Class 20 for higher-inertia loads like conveyors or crushers. The adjustable dial lets you set the trip threshold within the 40-50 A band without swapping the unit. UL508 listing covers the MMP as a self-protected combination motor controller. The unit carries short-circuit protection and phase-loss detection in one package, which simplifies panel layout and reduces wiring compared to a separate breaker-plus-overload configuration. ## Panel fit and peer comparison The MS450-50E is a DIN-rail mountable MMP in the MS450 series, designed for 3-phase motor branch circuits up to 50 A. It provides both overload and short-circuit protection, so it can serve as the sole protective device in a motor starter circuit per UL508. The 600 V rating covers 480 V and 600 V nominal systems without derating.","metaTitle":"ABB MS450-50E Manual Motor Protector, 50 A, 3-Phase, UL508","metaDescription":"ABB MS450-50E manual motor protector, 40-50 A FLA range, 3-phase, 600 V rated, UL508, Trip Class 10/20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Amps":"50","Type":"Manual Motor Protector","Phase":"3","title":"MS450-50E","Amps Range":"40 - 50","description":"40.00 - 50.00 FLA MMP, MS450|40.00 - 50.00 FLA (Full Load Amps). MMP, 600V Rated, UL508, Trip Class: 10/20. Type MS450. Includes: Short Circuit Protection and Phase Failure Detection.","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$679.72","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1a9242ef3fe89548fb28ee05a51ecde8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy MS450-50E and get a price?","answer":"Submit an RFQ for a firm price and lead-time estimate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/MS450-50E","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/MS450-50E 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}}