{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF32-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF32-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF32-0DH0, molded case circuit breaker, 3-pole, 20 A rated continuous current, line protection, TM240 overcurrent release, undervoltage release, IP40 front.","salesMarkdown":"The Siemens SENTRON 3VA1120-3EF32-0DH0 is a 3-pole molded case circuit breaker rated for 20 A continuous current at 40 °C, with a TM240 thermal-magnetic overcurrent release. It's built for line protection — meaning it guards the feeder or branch circuit against overload and short-circuit, not a specific motor or load. The interrupting ratings climb to 75.6 kA at 240 V and 52.5 kA at 415 V, so it can handle substantial fault currents on a 400 V industrial panel without needing an upstream fuse to back it up. Derating is real with this one: it holds a full 20 A up to 50 °C, then drops to 19.2 A at 55 °C and 18 A at 70 °C. The 3VA1120-3EF32-0DH0 measures 76.2 mm wide by 130 mm tall by 70 mm deep — a compact footprint for a 3-pole MCCB in the 20 A class. It mounts directly onto a DIN rail or panel plate via the standard SENTRON base; no adapter kit required. The UVR is wired in series with the control supply; if that supply drops, the breaker trips. This is standard for emergency-stop or safety-circuit separation — not a communication-enabled breaker, so no Modbus or PROFIBUS on this variant. The integrated auxiliary trip is order code 3VA9608-0BB25, which is a separate line item if you need a replacement or spare. ## Selectivity and coordination notes With interrupting ratings of 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V, this MCCB provides solid SCCR headroom for most 400 V distribution panels. At 690 V the 10.5 kA rating is lower — if your system runs at that voltage and has a high available fault current, verify coordination upstream. Latching endurance is 15,000 operations.","metaTitle":"Siemens 3VA1120-3EF32-0DH0 SENTRON MCCB, 20 A, 3-Pole, Line","metaDescription":"Siemens SENTRON 3VA1120-3EF32-0DH0 molded case circuit breaker, 20 A rated, 3-pole, line protection, 75.6 kA at 240 V. Current lifecycle stage. Sourced to order.","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":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches + 1 trip alarm switch 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":"3VA9608-0BB25","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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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":"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=426445&mlfb=3VA1120-3EF32-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0DH0/alternatives.json"},"ai":{"faq":[{"question":"What auxiliary contacts come with this MCCB?","answer":"It includes 2 auxiliary switches and 1 trip alarm switch (HQ type). The auxiliary release is an undervoltage release (UVR). The integrated auxiliary trip order code is 3VA9608-0BB25."},{"question":"What are the physical dimensions of this breaker?","answer":"Width is 76.2 mm, height is 130 mm, and depth is 70 mm. It mounts on DIN rail or panel plate."},{"question":"Does the 3VA1120-3EF32-0DH0 drop into a panel specified around the 3VA1110-5EE32-0DC0?","answer":"Both are 3-pole SENTRON MCCBs with similar physical dimensions, so they share the same DIN-rail footprint and bus-bar spacing. The key difference is the 3VA1120-3EF32-0DH0 has a TM240 release rated at 20 A, while the 3VA1110-5EE32-0DC0 carries a different release and rating. Verify the load current and trip curve match your panel design before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0DH0","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/3VA1120-3EF32-0DH0 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}}