{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-4EF36-0CH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-4EF36-0CH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-4EF36-0CH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF36-0CH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class S, 36kA @ 415V, 3-pole, line protection TM240, ATAM, In=40A, overload Ir=28-40A, short-circuit Ii=5-10xIn, clamp connection, undervoltage release 120-127V AC, 2 auxiliary switches HQ, 1 trip alarm switch HQ.","salesMarkdown":"## What this breaker carries and why it matters The Siemens 3VA1140-4EF36-0CH0 is a 3-pole IEC frame 160 MCCB with a 36 kA breaking capacity at 415 V (class S), rated In=40 A. The TM240 thermal-magnetic trip unit gives adjustable overload protection from 28 to 40 A and short-circuit pickup at 5 to 10 times In — so you set the Ir to match your cable or load, not the breaker's maximum. The built-in undervoltage release (UVR) operates on 120–127 V AC 50/60 Hz; if that control voltage drops, the breaker trips instantly, which is standard for emergency-stop or mains-monitoring circuits. Two HQ auxiliary switches and one HQ trip alarm switch are factory-fitted, so you get remote status and fault indication without adding accessories. For a panel with a 25 kA available fault current at the main distribution board, this breaker has headroom. The adjustable Ir (28–40 A) lets you fine-tune overload protection without swapping the trip unit; the Ii range (5–10 x In) means the magnetic trip can be set as low as 200 A or as high as 400 A, which matters for motor-starting inrush or high-impedance fault discrimination. The UVR coil draws power continuously when the breaker is closed; if your control voltage is 120 V AC, this is a direct fit — no external relay needed. The UVR and auxiliary switches are wired via the breaker's internal terminal block; the trip alarm switch changes state when the breaker trips on fault, not on manual off, so a PLC can distinguish a trip from a normal shutdown.","metaTitle":"Siemens 3VA1140-4EF36-0CH0 Circuit Breaker, 36kA @ 415V, 40A","metaDescription":"Siemens 3VA1140-4EF36-0CH0 IEC frame 160 MCCB, 36kA breaking capacity, 40A TM240 thermal-magnetic, undervoltage release 120-127V AC. Active lifecycle, available 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=477030&mlfb=3VA1140-4EF36-0CH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-4EF36-0CH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1140-4EF36-0CH0?","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 does the TM240 trip unit mean for setting overload protection?","answer":"TM240 means a thermal-magnetic trip with adjustable overload Ir from 28 to 40 A and short-circuit pickup Ii from 5 to 10 times In (200–400 A)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-4EF36-0CH0","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/3VA1140-4EF36-0CH0 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}}