{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF36-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF36-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EF36-0HC0, 3-pole molded case circuit breaker, 20 A rated current (40 °C), 75.6 kA breaking capacity at 240 V, line protection design, with shunt trip and 2 HQ auxiliary switches.","salesMarkdown":"Three poles, rated 20 A continuous at 40 °C, with a breaking capacity of 75.6 kA at 240 V AC — that's the short-circuit current it can safely interrupt without welding or rupturing. Rated current holds at 20 A from 40 °C up to 50 °C, then derates to 19 A at 60–70 °C (–). That means in a warm panel (say 55 °C ambient), the breaker still carries the full 20 A — no need to oversize. Breaking capacity steps down with voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, 11.9 kA at 500 V and 690 V (–). For a 480 V system, the 32 kA at 440 V is the closest published point; the actual SCCR at 480 V will be between 32 kA and 11.9 kA — coordination study needed if fault current approaches that range. No undervoltage release or ground-fault module on this variant. ## Integration notes The 3-pole footprint matches the SENTRON 3VA family — if you're replacing a 3VA1110-5ED36-0AC0, the width and depth are identical; the height is the same 130 mm. No rewiring needed for the line and load lugs, but verify the shunt trip wiring and aux contact assignment against the existing panel schematic.","metaTitle":"Siemens 3VA1120-3EF36-0HC0 SENTRON MCCB, 3-Pole, 20 A, 75.6","metaDescription":"Siemens SENTRON 3VA1120-3EF36-0HC0 molded case circuit breaker, 3-pole, 20 A rated at 40 °C, 75.6 kA breaking at 240 V. Active production. 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":"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":"3VA11203EF360AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","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":"3VA9688-0BL30","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":"3VA9988-0AA12","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=51243&mlfb=3VA1120-3EF36-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF36-0HC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-3EF36-0HC0 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What is the closest functional second-source to 3VA1120-3EF36-0HC0?","answer":"The 3VA1110-5ED36-0AC0 is a peer in the same SENTRON family, but it has a different current rating and breaking capacity — verify the load and fault current requirements before substituting."},{"question":"Will 3VA1120-3EF36-0HC0 drop into a panel specified for 3VA1110-5ED36-0AC0?","answer":"Yes, the 3-pole SENTRON 3VA family shares the same 76.2 mm width and 70 mm depth (–), so it fits the same DIN-rail or panel-mount footprint without rewiring. Check the shunt trip and aux contact wiring against the existing schematic."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF36-0HC0","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/3VA1120-3EF36-0HC0 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}}