{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0HH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0HH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0HH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0HH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 series, IEC frame 160 MCCB, breaking capacity class N, 3-pole, In=20A, Icu=25kA @ 415V, TM240 line protection, shunt trip, 2 aux switches, 1 alarm switch.","salesMarkdown":"The Siemens 3VA1120-3EF36-0HH0 is a 3-pole IEC frame 160 molded case circuit breaker (MCCB) from the 3VA1 series, rated at 20 A with a breaking capacity of 25 kA at 415 V (class N). It carries a TM240 thermal-magnetic trip unit with adjustable overload protection (Ir = 14...20 A) and short-circuit protection (Ii = 8...16 × In). A shunt trip (STL) rated for 12–30 V DC or 24 V AC at 50/60 Hz is built in, along with two auxiliary switches (HQ) and one trip alarm switch (HQ). The TM240 trip unit gives you a thermal-adjustment range of 14–20 A (Ir) via a dial, letting you match the breaker to the actual load without swapping the whole device; the magnetic short-circuit pickup is fixed at 8–16 times In (160–320 A), which covers motor-start inrush and cable protection. The shunt trip allows remote tripping from a PLC or emergency-stop circuit, and the two auxiliary plus one alarm switch provide status feedback — open/closed for the aux, tripped for the alarm — so a panel PLC knows exactly what state the breaker is in. ## Where it fits in a panel The clamp-type terminals accept copper or aluminum conductors; no special lug kit is needed for standard panel wiring. The shunt trip coil draws power from a separate control circuit — verify the 12–30 V DC or 24 V AC supply is present and fused appropriately, because a loss of that supply disables remote trip capability. The auxiliary and alarm switches are wired back to a digital input module on the PLC for status monitoring.","metaTitle":"Siemens 3VA1120-3EF36-0HH0 MCCB, 20A, 25kA @ 415V","metaDescription":"Siemens 3VA1120-3EF36-0HH0 IEC frame 160 MCCB, 3-pole, 20A, Icu=25kA @ 415V. Lifecycle: current. Quoted 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":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=309863&mlfb=3VA1120-3EF36-0HH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0HH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB?","answer":"The ultimate breaking capacity (Icu) is 25 kA at 415 V AC, which is the class N rating for the IEC frame 160 platform."},{"question":"What does the TM240 trip unit adjust to?","answer":"The TM240 provides thermal overload adjustment (Ir) from 14 A to 20 A, and the magnetic short-circuit pickup (Ii) is fixed at 8 to 16 times the rated current In (160–320 A)."},{"question":"Where can I buy the 3VA1120-3EF36-0HH0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What accessories are built into this breaker?","answer":"It includes a shunt trip (STL) rated 12–30 V DC or 24 V AC, two auxiliary switches (HQ), and one trip alarm switch (HQ)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0HH0","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/3VA1120-3EF36-0HH0 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}}