{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0JH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0JH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0JH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0JH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0JH0, molded case circuit breaker, 3-pole, 20 A rated current, 121 kA breaking capacity at 240 V, line protection design, shunt trip release, 2 aux switches + 1 trip alarm.","salesMarkdown":"It carries a 20 A continuous rating across the 40 °C to 55 °C ambient range, derating to 19 A at 60 °C through 70 °C — so in a warm enclosure you lose 1 A, not a full trip unit step. The 70 mm depth and 76.2 mm width match the standard 3VA fixed-panel footprint — it bolts into the same mounting pattern as the rest of the 3VA1 family without re-drilling the subplate. ## Breaking capacity — the real coordination number The interrupting rating is what decides whether this breaker coordinates with downstream devices. At 240 V it clears 121 kA; at 415 V that drops to 75.6 kA; at 440 V it's 52.5 kA; and at 500 V / 690 V it holds at 11.9 kA. For a 480 V panel fed by a 1500 kVA transformer, the available fault current typically runs 30–50 kA — this breaker covers that with headroom. At 600 V (common in Canadian and some US industrial plants) the 11.9 kA rating means it's suited for lower-fault locations or where a current-limiting upstream device clips the let-through. ## Auxiliary configuration and release The shunt trip lets a PLC, safety relay, or E-stop circuit open the breaker without a manual visit — common in conveyor interlock and emergency-off schemes.","metaTitle":"Siemens 3VA1120-4EF36-0JH0 SENTRON MCCB, 20 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0JH0 molded case circuit breaker, 20 A, 3-pole, 121 kA breaking capacity at 240 V. Active lifecycle. 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":"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":"Yes","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 Switch":"2 auxiliary switches + 1 trip alarm switch 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":"3VA9688-0BL32","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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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=285075&mlfb=3VA1120-4EF36-0JH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0JH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at 480 V?","answer":"At 440 V the interrupting rating is 52.5 kA; at 500 V it is 11.9 kA. For a 480 V system, the value falls between those two published points — expect approximately 30–40 kA based on the voltage slope, but coordination studies should use the manufacturer's published curves."},{"question":"Will the 3VA1120-4EF36-0JH0 drop into a panel designed for the 3VA1110-5ED36-0AC0?","answer":"Both are 3VA1 frame-size MCCBs with the same 70 mm depth and 76.2 mm width, so the physical mounting pattern is identical. The difference is the 20 A rating and shunt trip release on this variant versus the other's configuration — verify the trip unit and auxiliary wiring before swapping."},{"question":"Where can I buy the 3VA1120-4EF36-0JH0 and how is it quoted?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at the time of quote — submit an inquiry for a firm offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0JH0","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/3VA1120-4EF36-0JH0 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}}