{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-5MH32-0AE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-5MH32-0AE0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-5MH32-0AE0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5MH32-0AE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class M, 3-pole, 125A, Icu=55kA @ 415V, starter protection TM120M, short-circuit protection Ii=5...15 x In, with nut keeper kit and 4 auxiliary switches HQ.","salesMarkdown":"The Siemens 3VA1112-5MH32-0AE0 is a 3-pole IEC frame 160 molded-case circuit breaker rated 125 A continuous, with a breaking capacity of 55 kA at 415 V (class M). It is configured for motor starter protection using a TM120M thermal-magnetic trip unit — note the TM prefix means thermal-magnetic, not electronic — and the adjustable short-circuit pickup Ii spans 5 to 15 times In. For a panel with a transformer-fed 415 V supply and a fault current below that threshold, this breaker provides adequate SCCR headroom without cascading upstream. The TM120M trip unit is sized for motor starting duty: the thermal element tracks motor heating during start and running, while the magnetic element handles the inrush without nuisance tripping. The adjustable Ii (5–15 x In) lets you coordinate with downstream contactors and overload relays — set it toward the lower end for a tight short-circuit protection band on a known load, or toward the upper end if the motor's locked-rotor current demands it. ## Deployment context The nut keeper kit simplifies busbar or cable lug termination — the nuts stay captive during wiring, which saves time on a panel with multiple breakers.","metaTitle":"Siemens 3VA1112-5MH32-0AE0 Circuit Breaker, 125A, 55kA @ 415","metaDescription":"Siemens 3VA1112-5MH32-0AE0 IEC frame 160 circuit breaker, 125A, 55kA breaking capacity @ 415V, starter protection TM120M. Lifecycle current. Sourced to order.","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":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=380145&mlfb=3VA1112-5MH32-0AE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5MH32-0AE0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this breaker?","answer":"The ultimate breaking capacity Icu is 55 kA at 415 V, which is class M for the 3VA1 frame. This means it can safely interrupt a fault current up to 55 kA once without damage."},{"question":"Where can I buy the 3VA1112-5MH32-0AE0 and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What does the TM120M trip unit mean?","answer":"TM120M is a thermal-magnetic trip unit rated 125 A continuous. The thermal element provides overload protection; the magnetic element provides short-circuit protection with an adjustable pickup Ii from 5 to 15 times In (625 A to 1875 A). It is designed for motor starter applications where the breaker protects the cable and motor against short circuits, while a separate overload relay handles running overloads."},{"question":"Does this breaker include auxiliary switches?","answer":"Yes, it ships with four HQ auxiliary switches pre-installed. These provide status contacts for remote indication or PLC input without needing a separate accessory block."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-5MH32-0AE0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3VA1112-5MH32-0AE0 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}}