{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-5MH36-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-5MH36-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-5MH36-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5MH36-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, 3-pole MCCB, breaking capacity class M, Icu=55kA @ 415V, In=125A, TM120M starter protection, clamp connection, UVR 208-230V AC, 2 aux switches HQ, 1 trip alarm switch HQ.","salesMarkdown":"The Siemens 3VA1112-5MH36-0DH0 is a 3-pole IEC frame 160 molded case circuit breaker rated 125 A with an ultimate breaking capacity Icu of 55 kA at 415 V AC. The 'M' breaking capacity class positions it for high-fault industrial distribution panels where 55 kA SCCR at 415 V is needed to safely interrupt bolted faults without cascading upstream — typical for main or large feeder breakers in heavy manufacturing or utility substations. ## Starter Protection and Auxiliary Configuration This unit ships with the TM120M thermal-magnetic release set for starter protection — the 'AM' designation means it provides short-circuit protection only (no overload protection), with an adjustable instantaneous trip Ii of 5 to 15 times In. Factory-fitted accessories include an undervoltage release (UVR) rated 208-230 V AC 50/60 Hz, two HQ auxiliary switches, and one HQ trip alarm switch. The HQ designation indicates high-auxiliary-rated contacts for control-circuit isolation. The UVR will trip the breaker on voltage drop or loss — wire it through an emergency-stop or undervoltage monitoring relay to prevent automatic restart after a line fault. ## Installation Context The 3VA1 frame breaker mounts in standard switchgear or panelboard cutouts with a DIN-rail adapter kit available for enclosure mounting. The clamp connection terminals simplify field wiring compared to lug-and-screw terminations — strip length and torque values per the manufacturer's published installation instructions. The UVR and auxiliary switches are pre-installed at the factory, reducing field labor and risk of miswiring.","metaTitle":"Siemens 3VA1112-5MH36-0DH0 Circuit Breaker, 125A, 55kA @ 415","metaDescription":"Siemens 3VA1112-5MH36-0DH0 IEC frame 160 circuit breaker, 3-pole, 125A, Icu=55kA @ 415V. Current lifecycle stage. Available to order. Request a quote.","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=148582&mlfb=3VA1112-5MH36-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5MH36-0DH0/alternatives.json"},"ai":{"faq":[{"question":"What accessories are included with this breaker?","answer":"Factory-fitted accessories include an undervoltage release (UVR) 208-230 V AC, two HQ auxiliary switches, and one HQ trip alarm switch. The UVR trips the breaker on voltage loss; the auxiliary switches provide status feedback to a PLC or annunciator."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-5MH36-0DH0","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/3VA1112-5MH36-0DH0 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}}