{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF36-0AG0, molded case circuit breaker, line protection, 3-pole, 20 A, TM240 release, breaking capacity 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, 10.5 kA at 690 V, IP40 front, 1 aux + 1 trip alarm, 70 mm depth.","salesMarkdown":"It is configured for line protection — no undervoltage release, no ground fault monitoring, no communication module. The front face carries a trip indicator and one auxiliary switch plus one trip alarm switch, which is the standard complement for remote status feedback on a feeder breaker. Breaking capacity is the headline spec here: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. At 690 V the 10.5 kA figure is lower but still adequate for most motor control center applications where the upstream transformer limits fault current. Temperature derating is published across the full operating range: full 20 A rating holds through 50 °C, then drops to 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C. Front protection is IP40 — dust-protected but not sealed. Suitable for indoor panel mounting where no washdown or condensation is expected. The IP40 rating applies to the front face only; the rear terminals are not covered by that rating and require the enclosure's own IP protection. The latching endurance is 15,000 operations — that is the mechanical life before the latch mechanism wears. For a breaker that cycles infrequently (a few times a year for maintenance isolation), that is effectively a lifetime rating. For a breaker used as a daily disconnect, it is a finite count to track. That means selectivity with downstream breakers depends on the natural time-current curve separation. For a simple radial feeder, it works fine. For a complex distribution with multiple levels of coordination, an electronic-trip 3VA variant (with adjustable I²t and short-time delay) would give more headroom. The auxiliary switch and trip alarm switch (1 each) are built in. The auxiliary switch follows the main contacts (open when breaker is open, closed when breaker is closed). The trip alarm switch changes state only on a fault trip — it stays in its normal position when the breaker is manually opened. That distinction matters for the PLC logic: use the trip alarm for a fault annunciation, not the auxiliary switch.","metaTitle":"Siemens 3VA1120-3EF36-0AG0 SENTRON MCCB, 20 A, 3-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3EF36-0AG0 molded case circuit breaker, 20 A, 3-pole, breaking capacity 75.6 kA at 240 V. Current lifecycle stage, sourced to order. Request RFQ for pricing","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 mm","Height":"130 mm","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 690 V":"10.5 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"19.2 A","at 60 °C":"18.8 A","at 65 °C":"18.4 A","at 70 °C":"18 A","Trip indicator":"Yes","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"1 auxiliary switch + 1 trip alarm switch HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","Design of the overcurrent release":"TM240","Design of short-circuit protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB11","Switching capacity class of the circuit breaker":"N","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"box terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"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=148169&mlfb=3VA1120-3EF36-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0AG0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1120-3EF36-0AG0?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels. No real-time price or stock count is published here."},{"question":"What compliance documentation does Siemens provide for 3VA1120-3EF36-0AG0?","answer":"Siemens SENTRON 3VA series MCCBs carry CE marking for the European market and are designed to meet IEC 60947-2. UL/CSA listings are available for the North American variants; the specific listing for this order code should be verified against the nameplate. RoHS and REACH declarations are standard Siemens documentation available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0AG0","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/3VA1120-3EF36-0AG0 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}}