{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0KC0, molded case circuit breaker, 3-pole, 20 A rated continuous current Iu, TM240 thermal-magnetic release, 121 kA interrupting at 240 V.","salesMarkdown":"It's built for line protection — the fixed version without a trip indicator, undervoltage release, phase failure detection, or ground fault monitoring. The interrupting ratings climb to 121 kA at 240 V and 75.6 kA at 415 V, dropping to 52.5 kA at 440 V and 11.9 kA at 690 V — so the SCCR headroom at typical distribution voltages is substantial. 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. Front protection is IP40 — fine for a clean panel interior, not for washdown zones. That 76.2 mm width (roughly 3 inches) is a standard MCCB footprint for 3-pole frames in this class — it fits existing SENTRON panel cutouts and busbar layouts without rework.","metaTitle":"Siemens 3VA1120-4EF36-0KC0 SENTRON MCCB, 20 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0KC0 molded case circuit breaker, 20 A rated, 3-pole, TM240 release, 121 kA at 240 V. Current lifecycle stage, sourced to order. Request a quote.","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":"3VA9688-0BL33","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":"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=242500&mlfb=3VA1120-4EF36-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0KC0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating at 415 V?","answer":"75.6 kA at 415 V. The full curve: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V."},{"question":"What auxiliary switches does this MCCB ship with?","answer":"It comes with 2 auxiliary switches in HQ configuration, plus a shunt trip (STL) auxiliary release. The integrated auxiliary trip order code is 3VA9688-0BL33."},{"question":"Where can I buy 3VA1120-4EF36-0KC0?","answer":"We source this part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request and we'll quote the line."},{"question":"What compliance documentation does this brand provide?","answer":"As a Siemens SENTRON MCCB, it carries the expected IEC/EN 60947-2 certifications. Specific RoHS, REACH, and UL documentation is available with the shipment upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0KC0","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/3VA1120-4EF36-0KC0 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}}