{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF32-0DC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF32-0DC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0DC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0DC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, Molded case circuit breaker, 3VA1120-3EF32-0DC0, 3-pole, 20 A, TM240 overcurrent release, 75.6 kA at 240 V, undervoltage release, 2 auxiliary switches HQ, IP40 front.","salesMarkdown":"## Siemens SENTRON 3VA1120-3EF32-0DC0 — 20 A MCCB with UVR and 2 Aux Switches The Siemens SENTRON 3VA1120-3EF32-0DC0 is a 3-pole molded case circuit breaker rated for a continuous current of 20 A at 40 °C, with a TM240 thermal-magnetic overcurrent release. Its breaking capacity reaches 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V — covering most industrial distribution panels up to 690 V line voltage. ## Breaking Capacity and Selectivity — What the Ratings Mean At 415 V the rating drops to 52.5 kA, and at 690 V to 10.5 kA — this is typical for a 20 A frame; it means the breaker can be used in high-fault-capacity 240 V panels (e.g., near a large transformer) but needs upstream coordination at higher voltages. The TM240 release provides thermal protection for overloads and magnetic trip for short circuits, with the magnetic threshold fixed at 240 A (12x In). ## Integration — Panel Fit and Wiring The 3VA1120-3EF32-0DC0 drops into a standard SENTRON MCCB cutout. The two HQ auxiliary switches (form C) can be wired to a PLC digital input for remote status; the undervoltage release (UVR) requires a separate 24 V DC or AC supply (coil voltage not listed here — verify against the panel control voltage). The TM240 release is non-interchangeable, so the breaker is factory-set for 20 A continuous.","metaTitle":"Siemens 3VA1120-3EF32-0DC0 SENTRON MCCB, 20 A, 3-pole, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3EF32-0DC0 molded case circuit breaker, 20 A rated, 3-pole, breaking capacity 75.6 kA at 240 V. TM240 release, UVR, 2 HQ aux switches. Active production, so","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":"3VA9608-0BB25","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":"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":"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=383139&mlfb=3VA1120-3EF32-0DC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF32-0DC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1120-3EF32-0DC0 at different voltages?","answer":"The breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. These values govern where the breaker can be applied in a fault-current coordination study."},{"question":"What auxiliary contacts and releases does this MCCB include?","answer":"It comes with two HQ auxiliary switches and an undervoltage release (UVR). The auxiliary switches can be used for remote status indication; the UVR trips the breaker when control voltage drops below a threshold."},{"question":"Where can I buy 3VA1120-3EF32-0DC0 and how is it quoted?","answer":"This part is sourced through independent distribution and is quoted to order against an RFQ. Availability and current pricing are confirmed at quote time; volume pricing is negotiable."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF32-0DC0","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/3VA1120-3EF32-0DC0 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}}