{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF36-0BC0, molded case circuit breaker, 3-pole, 20 A, TM240 overcurrent release, 75.6 kA at 240 V, undervoltage release, 2 auxiliary switches HQ, IP40 front.","salesMarkdown":"It carries a continuous current of 20 A at 40 °C and holds that rating up to 50 °C; above that it derates to 19.2 A at 55 °C and 18 A at 70 °C. The interrupting capacity scales with system voltage — 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — so it handles high-fault scenarios on 400 V class panels without cascading upstream. The TM240 thermal-magnetic release provides fixed time-current characteristics for overload and short-circuit protection. The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON panelboards and distribution blocks without re-drilling. The front face carries an IP40 protection class, adequate for enclosed switchgear but not for washdown environments. The undervoltage release and auxiliary switches are factory-installed; no field-assembly of those accessories is needed. ## What the key ratings mean for the buyer The 20 A continuous rating is the maximum load it can carry indefinitely at 40 °C ambient; if your panel runs hotter than 50 °C, you must derate to 19.2 A or lower. The TM240 release is a fixed thermal-magnetic type — no interchangeable trip units, so the 20 A rating is locked in at the factory.","metaTitle":"Siemens 3VA1120-3EF36-0BC0 SENTRON MCCB, 20 A, 3-Pole, 75.6","metaDescription":"Siemens 3VA1120-3EF36-0BC0 SENTRON molded case circuit breaker, 20 A, 3-pole, 75.6 kA at 240 V. Active lifecycle. Quoted to order. Request RFQ.","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":"No","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":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HQ","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":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB11","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":"3VA9988-0AA12","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=155446&mlfb=3VA1120-3EF36-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-3EF36-0BC0 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the depth of 3VA1120-3EF36-0BC0?","answer":"The depth is 70 mm, which fits standard SENTRON panelboard cutouts and leaves clearance for wiring behind the breaker."},{"question":"What is the width of 3VA1120-3EF36-0BC0?","answer":"The width is 76.2 mm — a standard 3-pole MCCB width that matches most DIN-rail or panel-mount footprints in the SENTRON family."},{"question":"Will 3VA1120-3EF36-0BC0 drop into a panel specified around 3VA1112-5EF32-0CA0?","answer":"The 3VA1120-3EF36-0BC0 shares the same 3-pole SENTRON platform and similar dimensions (76.2 mm wide, 130 mm tall, 70 mm deep), so it will physically fit the same cutout and busbar spacing. However, the 3VA1112-5EF32-0CA0 has a different trip rating and interrupting capacity — verify the electrical ratings match your panel's coordination study before swapping."},{"question":"What compliance documentation does Siemens provide for 3VA1120-3EF36-0BC0?","answer":"Siemens SENTRON MCCBs are typically supplied with a Declaration of Conformity covering IEC 60947-2 and UL 489, plus RoHS and REACH compliance statements. Specific documentation can be requested at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0BC0","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/3VA1120-3EF36-0BC0 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}}