{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4EF36-0JC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4EF36-0JC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0JC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0JC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-4EF36-0JC0, molded case circuit breaker, 3-pole, 20 A rated current, 121 kA interrupting capacity at 240 V AC, line protection design.","salesMarkdown":"It carries a continuous current of 20 A across an ambient range of 40 °C to 55 °C, derating to 19 A at 60 °C through 70 °C. The interrupting capacity is 121 kA at 240 V AC, stepping down to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — the same 11.9 kA figure at 690 V tells you the breaker's internal arc extinction is voltage-limited above that threshold, so coordination studies at higher voltages need that ceiling. Above 55 °C, you lose 1 A per 5 °C step. That matters if the breaker sits near a transformer or in a non-ventilated enclosure; at 60 °C ambient you still have 19 A of headroom, enough for a 15 A continuous load with margin. The 121 kA interrupting rating at 240 V is the headline number, but the real-world coordination value is at 415 V (75.6 kA) and 440 V (52.5 kA) — common industrial distribution voltages where the available fault current often sits between 50 and 65 kA. The 12 W maximum power loss is low enough that multiple breakers in a row don't drive up the internal panel temperature beyond what the 20 A rating expects. ## Built-in accessories and integration No communication module is fitted, so this is a hardwired-only unit. Dimensions are 70 mm depth, 76.2 mm width, 130 mm height — standard 3-pole MCCB footprint for the SENTRON 3VA platform. As a SENTRON 3VA series MCCB, this breaker is designed and tested to IEC 60947-2 and UL 489 standards for molded case circuit breakers. The unit carries no ground-fault monitoring or undervoltage release — those are separate accessory variants.","metaTitle":"Siemens SENTRON 3VA1120-4EF36-0JC0 MCCB, 20 A, 121 kA at 240","metaDescription":"Siemens SENTRON 3VA1120-4EF36-0JC0 molded case circuit breaker, 3-pole, 20 A rated, 121 kA interrupting 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":"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 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":"3VA9688-0BL32","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=328232&mlfb=3VA1120-4EF36-0JC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4EF36-0JC0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1120-4EF36-0JC0 at 415 V?","answer":"75.6 kA at 415 V AC. The breaker also carries 121 kA at 240 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V."},{"question":"Does this breaker include a shunt trip or auxiliary contacts?","answer":"Yes, it ships with a shunt trip (STL) for remote tripping and two auxiliary switches (HQ type) for status feedback. No communication module or ground-fault monitoring is fitted."},{"question":"Where can I buy 3VA1120-4EF36-0JC0 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4EF36-0JC0","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/3VA1120-4EF36-0JC0 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}}