{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF36-0AF0, molded case circuit breaker, 3-pole, 20 A, TM240 release, 75.6 kA at 240 V, line protection design.","salesMarkdown":"## MCCB for line protection — 20 A, 3-pole, TM240 release Breaking capacity runs 75.6 kA at 240 V, stepping down to 52.5 kA at 415 V and 32 kA at 440 V, which covers most industrial service-entrance and distribution panel fault levels. At 240 V the 75.6 kA interrupting rating is high enough for most main-breaker positions in North American distribution. At 415 V (common in IEC markets) the 52.5 kA still handles substantial fault current — enough to coordinate with upstream transformers in the 1–2 MVA range. The drop to 32 kA at 440 V and 11.9 kA at 500/690 V reflects the physics of arc extinction in air at higher voltages; if your system runs 690 V, verify the available fault current is under 11.9 kA or step to a higher-rated frame. The TM240 release holds 20 A through 55 °C, then derates to 19 A at 60–70 °C — useful when the breaker is in a warm enclosure near other heat sources. ## Panel integration — footprint and aux switching The 3VA1120-3EF36-0AF0 measures 130 mm high, 76.2 mm wide, and 70 mm deep — a standard 3-pole MCCB footprint that fits Siemens SENTRON distribution panels and most DIN-rail-mount enclosures with the appropriate adapter. The integrated 1 auxiliary + 1 trip alarm switch HQ provides remote status indication (breaker open/closed and tripped) without needing an add-on module.","metaTitle":"Siemens 3VA1120-3EF36-0AF0 SENTRON MCCB, 20 A, 3-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3EF36-0AF0 molded case circuit breaker, 20 A rated, 3-pole, 75.6 kA at 240 V. Line protection with TM240 release. Current lifecycle stage. Quoted 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","Maximum":"0 A","Minimum":"0 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 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":"Yes","Number Of Poles":"3","Voltage Trigger":"No","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":"3VA11203EF360AA0","Design Of The Auxiliary Switch":"1 auxiliary switch + 1 trip alarm switch HQ","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","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"N","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=182993&mlfb=3VA1120-3EF36-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0AF0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-3EF36-0AF0 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the breaking capacity of 3VA1120-3EF36-0AF0 at different voltages?","answer":"The interrupting rating is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Verify your available fault current is below these thresholds."},{"question":"Does 3VA1120-3EF36-0AF0 have an undervoltage release or communication function?","answer":"No. This variant has no undervoltage release and no communication function — it is a standalone thermal-magnetic MCCB for line protection."},{"question":"What is the ambient temperature derating for this MCCB?","answer":"The breaker carries 20 A from 40 °C through 55 °C, then derates to 19 A at 60–70 °C. Operating range is -25 °C to +70 °C; storage range is -40 °C to +80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0AF0","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/3VA1120-3EF36-0AF0 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}}