{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"1SDA054436R1","brand":"ABB","brandSlug":"abb","productSlug":"1SDA054436R1","canonicalUrl":"https://aoctrl.com/abb/1SDA054436R1","factsUrl":"https://aoctrl.com/api/mcp/products/1SDA054436R1","rawCanonicalId":null},"summary":{"shortDescription":"ABB 1SDA054436R1 T5N400TMA320 molded case circuit breaker, 320 A fixed thermal-magnetic trip, T5N400 frame.","salesMarkdown":"## What the 320 A TMA trip means for fit The TMA designation indicates a thermal-magnetic trip — the thermal element protects against sustained overloads (cable heating, moderate overcurrents), while the magnetic element handles short-circuit faults with instantaneous response. The 320 A rating sets the continuous current limit; for motor or transformer feeder applications, size the upstream cable and downstream load so the full-load current stays below this threshold. The T5N400 frame carries a 400 A maximum frame rating, so this breaker is a 320 A fixed-trip variant within that frame — no interchangeable trip units, which simplifies BOM but locks the rating. ## Panel and deployment context In a distribution panel, it occupies a single module width for the frame size. The fixed thermal-magnetic trip means no field adjustment of the current setting — specify the exact 320 A rating at the design stage. For selective coordination studies, the TMA trip curve data is available from ABB's documentation set.","metaTitle":"ABB 1SDA054436R1 T5N400TMA320 Molded Case Circuit Breaker, 3","metaDescription":"ABB 1SDA054436R1 T5N400TMA320 molded case circuit breaker, 320 A thermal-magnetic trip. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/1SDA054436R1/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 1SDA054436R1 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock or price figures are published here."},{"question":"What is the 1SDA054436R1's description and rating?","answer":"The ABB 1SDA054436R1 is a T5N400TMA320 molded case circuit breaker with a 320 A fixed thermal-magnetic trip unit, in the T5N400 frame."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/abb/1SDA054436R1","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/1SDA054436R1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}