{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0KA0, 3-pole molded case circuit breaker, 20 A at 40 °C, TM240 thermal-magnetic release, shunt trip (STL), 121 kA breaking capacity at 240 V.","salesMarkdown":"Rated 20 A continuously at 40 °C, it holds that rating flat through 55 °C, then derates to 19 A at 60 °C and 70 °C — so in a warm panel you lose 1 A, not half the rating. Breaking capacity runs 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. That 121 kA at 240 V is the headline number, but the 75.6 kA at 415 V is the one that matters for most three-phase commercial and light industrial panels — it clears high-fault scenarios without cascading upstream. ## Shunt trip — what it buys you The shunt trip (STL) release lets you open the breaker remotely — fire alarm, emergency stop, or a PLC-driven safety sequence can fire the trip coil and kill the load without someone walking the panel. Power loss is 12 W max, which is modest for a 20 A MCCB with a shunt trip holding in. The 3VA1120-4EF36-0KA0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that drops into SENTRON distribution panels and most DIN-rail or mounting-plate layouts. No communication function onboard, so no backplane wiring or bus coupler to account for; just the line and load lugs plus the shunt trip control wires.","metaTitle":"Siemens 3VA1120-4EF36-0KA0 SENTRON MCCB, 20A, 3-Pole, Shunt","metaDescription":"Siemens 3VA1120-4EF36-0KA0 SENTRON molded case circuit breaker, 20A rated at 40°C, 3-pole, 121kA at 240V breaking capacity. TM240 release, shunt trip. Active production. Sourced to","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","Maximum":"0 A","Minimum":"0 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"11.9 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":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"Yes","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"12 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11204EF360AA0","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","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","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL33","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"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=122339&mlfb=3VA1120-4EF36-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0KA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-4EF36-0KA0 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 3VA1120-4EF36-0KA0's breaking capacity at 415 V?","answer":"75.6 kA at 415 V — that's the figure that governs most three-phase commercial and light industrial fault clearing."},{"question":"What compliance documentation does this brand provide for 3VA1120-4EF36-0KA0?","answer":"As a SENTRON MCCB from Siemens, it carries the usual IEC/UL certifications for the class — the specific approvals (UL, CSA, CE, UKCA, etc.) are listed in the manufacturer's datasheet and declaration of conformity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0KA0","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/3VA1120-4EF36-0KA0 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}}