{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MS325-6.3","brand":"ABB","brandSlug":"abb","productSlug":"MS325-6.3","canonicalUrl":"https://aoctrl.com/abb/MS325-6.3","factsUrl":"https://aoctrl.com/api/mcp/products/MS325-6.3","rawCanonicalId":null},"summary":{"shortDescription":"ABB MS325-6.3 Manual Motor Protector, 3-phase, 4-6.3 A adjustable FLA, Trip Class 10, 600 VAC, UL508 listed, phase failure detection.","salesMarkdown":"The MS325-6.3 is a manual motor protector (MMP) with an adjustable full-load ampere range of 4 to 6.3 A, covering fractional-horsepower three-phase motors up to about 3 HP at 460 V. The 6.3 A top end is the setting you dial in for a motor nameplate FLA of 6.3 A or less — the overload element is matched to the motor's thermal damage curve. Trip Class 10 means the device opens within 10 seconds at 600% of the set current. Rated 600 VAC, so it works on 480 V and 600 V industrial systems without voltage derating. The 3-phase construction means it monitors all three legs — a phase loss on any one will trip the protector, preventing single-phasing damage. ## UL508 listing and panel coordination UL508 listed as a manual motor controller with integral overload and short-circuit protection. In a North American panel, this means the MS325-6.3 can serve as both the branch-circuit overcurrent device and the motor overload relay in one package — no separate fuse or circuit breaker needed upstream for the motor branch, provided the available fault current is within the device's SCCR rating. Phase failure detection is built in — the protector senses when one phase drops out and trips all three poles, preventing the motor from running on two phases and overheating. ## Lifecycle and sourcing — current production No stock-holding claim is made; each RFQ is handled on its own lead-time and volume terms.","metaTitle":"ABB MS325-6.3 Manual Motor Protector, 6.3 A, 3-Phase, UL508","metaDescription":"ABB MS325-6.3 manual motor protector, 4-6.3 A adjustable, trip class 10, 600 VAC, 3-phase. UL508 listed. Active production, quoted to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Amps":"6.300","Type":"Manual Motor Protector","Phase":"3","title":"MS325-6.3","Amps Range":"4 - 6.300","description":"Manual Motor Protector, 4 - 6.3 FLA, MS325, 600VAC, Trip Class 10|4 - 6.3 FLA (Full Load Amps). MMP, 600V Rated, UL508, Trip Class: 10. Type MS325. Includes: Short Circuit Protection and Phase Failure Detection.","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1a9242ef3fe89548fb28ee05a51ecde8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between MS325-6.3 and MS132-6.3?","answer":"Both are ABB manual motor protectors with the same 4-6.3 A adjustable range and Trip Class 10. The MS132-6.3 is a different frame size with a different mounting footprint and terminal layout. The MS325-6.3 will not drop into a panel cutout or DIN-rail position designed for the MS132 series without mechanical adaptation. Functionally they cover the same motor protection envelope, but the physical interchange is not direct."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/abb/MS325-6.3","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/MS325-6.3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}