{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF32-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF32-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF32-0HC0, molded case circuit breaker, line protection, 3-pole, 20 A rated, TM240 thermal-magnetic release, 121 kA at 240 V, 2 HQ auxiliary switches, shunt trip.","salesMarkdown":"The Siemens SENTRON 3VA1120-4EF32-0HC0 is a 3-pole molded case circuit breaker rated for a continuous current Iu of 20 A, with a TM240 thermal-magnetic release. Its interrupting capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — figures that cover most industrial distribution panels and motor branch circuits. At 690 V it still holds 11.9 kA, so it handles the high-voltage end of a 690 VAC line without cascading upstream. The 20 A rating holds flat from 40 °C to 50 °C. Above that it derates: 19.2 A at 55 °C, 18.8 A at 60 °C, 18.4 A at 65 °C, and 18 A at 70 °C. If the panel ambient runs above 50 °C, the continuous load must be reduced accordingly — the TM240 release is calibrated for the 40 °C reference, not the 70 °C operating maximum. The 15000-cycle latching endurance is typical for this class; expect it to outlast the panel's service life in normal switching duty. Dimensions are 76.2 mm wide, 130 mm tall, and 70 mm deep. The width matches the standard 3VA 3-pole footprint, so it drops into the same DIN-rail or screw-mount cutout as the rest of the SENTRON 3VA family.","metaTitle":"Siemens 3VA1120-4EF32-0HC0 SENTRON MCCB, 20 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1120-4EF32-0HC0 molded case circuit breaker, 20 A rated, 3-pole, 121 kA breaking at 240 V. Active production. 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":"Yes","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":"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":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL30","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":"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=502766&mlfb=3VA1120-4EF32-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF32-0HC0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1120-4EF32-0HC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 3VA1120-4EF32-0HC0 drop into a panel that was specified around 3VA1110-5EE32-0JA0 without rewiring?","answer":"Yes — both are 3-pole SENTRON 3VA breakers with the same 76.2 mm width and identical terminal layout. The 3VA1120 carries higher interrupting capacities (121 kA vs the 3VA1110's typical 70 kA at 240 V), so it is a drop-in upgrade. No rewiring needed."},{"question":"What is the depth of 3VA1120-4EF32-0HC0?","answer":"The body depth is 70 mm. Add clearance for the shunt trip wiring and auxiliary switch harness."},{"question":"What compliance documentation does this brand provide for 3VA1120-4EF32-0HC0?","answer":"As a Siemens SENTRON product, it carries the standard IEC/EN 60947-2 certification for molded case circuit breakers. The manufacturer provides the declaration of conformity and the device manual (including the 3VA molded case circuit breaker manual referenced for DC network applications)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF32-0HC0","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/3VA1120-4EF32-0HC0 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}}