{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0BA0, molded case circuit breaker, 3-pole, 20 A, TM240 release, 121 kA at 240 V, 70 mm depth.","salesMarkdown":"It's built for line protection — meaning it sits on the feeder side of a panel, protecting downstream wiring and loads from overloads and short circuits. The 121 kA breaking capacity at 240 V tells you it can safely interrupt a fault up to that level without welding contacts or cascading upstream; at 415 V that figure is 75.6 kA, at 440 V it's 52.5 kA, and at 690 V it's 11.9 kA. Above that it starts to step down: 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C. ## Built-in undervoltage release, no auxiliary contacts There is no auxiliary contact block included (order separately if you need status feedback), no ground-fault monitoring, no phase-failure detection, and no communication module. The integrated auxiliary trip is order code 3VA9608-0BB11 if you need a shunt trip. The TM240 release is thermal-magnetic, fixed, non-adjustable — set at the factory for 20 A. The breaker measures 76.2 mm wide (that's 3 inches — standard for a 3-pole MCCB in this frame), 130 mm tall, and 70 mm deep. No trip indicator on the front — you'll need a voltmeter or a downstream indication to confirm state.","metaTitle":"3VA1120-4EF32-0BA0 SENTRON MCCB, 20 A, 3-Pole, 121 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0BA0 molded case circuit breaker, 20 A rated, 3-pole, 121 kA breaking at 240 V. Current lifecycle stage. Sourced to order against 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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 690 V":"11.9 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":"Without","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":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"S","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":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=207769&mlfb=3VA1120-4EF32-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0BA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1120-4EF32-0BA0?","answer":"Submit an RFQ through the storefront. Availability and current pricing are confirmed at quote time; the part is sourced to order through independent distribution."},{"question":"What is the breaking capacity of 3VA1120-4EF32-0BA0 at different voltages?","answer":"121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. That's a high-interrupting rating for a 20 A frame."},{"question":"Does 3VA1120-4EF32-0BA0 include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) as standard. No auxiliary contacts, no ground-fault monitoring, no communication module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0BA0","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/3VA1120-4EF32-0BA0 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}}