{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160 circuit breaker, breaking capacity class N, Icu=25kA @ 415V, 3-pole, line protection TM240, ATAM, In=20A, overload Ir=14…20A, short-circuit Ii=8…16 x In, clamp connection, undervoltage release 24V DC, 2 aux switches HQ, 1 trip alarm switch HQ.","salesMarkdown":"## What this breaker carries and what it means for the panel The TM240 trip unit gives you thermal-magnetic protection: overload adjustable from 14 A to 20 A (In=20 A) and a short-circuit magnetic pickup set at 8 to 16 times In. For a 20 A feeder, that means the magnetic trip fires between 160 A and 320 A — fast enough to clear a bolted fault before the upstream device sees it, but high enough to avoid nuisance trips from motor inrush on a lightly loaded line. ## Auxiliary contacts and alarm switch — what they add Two HQ auxiliary switches and one HQ trip alarm switch are factory-fitted. The aux switches signal the breaker's open/closed position to a PLC or status lamp; the trip alarm switch changes state only when the breaker trips on fault, not on manual opening — useful for remote fault annunciation without wiring separate shunt-trip monitoring. ## Integration notes — DIN rail and wiring Clamp terminals accept copper conductors — no lugs needed for the rated current range. Leave at least 25 mm clearance above and below for arc-vent space and tool access when terminating the UVR and aux-switch wires.","metaTitle":"Siemens 3VA1120-3EF36-0BH0 Circuit Breaker, 25kA @ 415V, 20A","metaDescription":"Siemens 3VA1120-3EF36-0BH0 IEC frame 160 circuit breaker, 25kA breaking capacity at 415V, 3-pole, TM240, 20A adjustable overload, UVR 24V DC, auxiliary switches. Current production","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=272606&mlfb=3VA1120-3EF36-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0BH0/alternatives.json"},"ai":{"faq":[{"question":"What does the TM240 trip unit adjust to?","answer":"Overload protection (Ir) adjustable from 14 A to 20 A; short-circuit pickup (Ii) adjustable from 8 to 16 times the rated current In=20 A."},{"question":"What voltage does the undervoltage release need?","answer":"The UVR coil is rated 24 V DC. If the control voltage drops below the dropout threshold, the breaker opens immediately."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0BH0","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/3VA1120-3EF36-0BH0 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}}