{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MS450-32","brand":"ABB","brandSlug":"abb","productSlug":"MS450-32","canonicalUrl":"https://aoctrl.com/abb/MS450-32","factsUrl":"https://aoctrl.com/api/mcp/products/MS450-32","rawCanonicalId":null},"summary":{"shortDescription":"ABB MS450-32 Manual Motor Protector, 32 A, 3-phase, adjustable 22-32 A range, UL508, Trip Class 10/20.","salesMarkdown":"## 32 A adjustable overload — sets the motor FLA window The MS450-32 is a 3-phase Manual Motor Protector (MMP) rated 32 A, with an adjustable overload range of 22 to 32 A Full Load Amps (FLA). That adjustment band is where you set the motor's actual running current — the device trips when the load exceeds that set point over time, protecting the winding from sustained overload. Trip Class is listed as 10/20, meaning the overload relay can be set to either a Class 10 or Class 20 trip curve. Class 10 trips faster (within 10 seconds at 600% of set current) — better for submersible pumps or compressors that must clear a stalled rotor quickly. Class 20 gives more time for high-inertia loads like fans or centrifuges to accelerate without nuisance tripping. ## Integrated short-circuit and phase-failure protection This MMP includes built-in short-circuit protection and phase-failure detection per the description. That means it combines the motor disconnect, overload relay, and magnetic short-circuit trip in one device — no separate fuse or circuit breaker needed upstream for the motor branch circuit, as long as the SCCR rating of the panel is met. Rated 600 V, UL508 listed — the standard for industrial control equipment in North America. The UL508 listing covers the device as a manual motor controller and protector, which is the basis for accepting it in a UL 508A panel. ## Active production — no successor on record Sourced through independent distribution channels.","metaTitle":"ABB MS450-32 Manual Motor Protector, 32 A, 3-Phase","metaDescription":"ABB MS450-32 Manual Motor Protector, 32 A, adjustable 22-32 A range, 3-phase, UL508, Trip Class 10/20. Active production, quoted to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Amps":"32","Type":"Manual Motor Protector","Phase":"3","title":"MS450-32","Amps Range":"22 - 32","description":"22.00 - 32.00 FLA. MMP, MS450|22.00 - 32.00 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":"$259.66","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1a9242ef3fe89548fb28ee05a51ecde8.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/MS450-32","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/MS450-32 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}}