{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-4EF36-0AC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-4EF36-0AC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-4EF36-0AC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF36-0AC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-4EF36-0AC0, 3-pole molded case circuit breaker, 125 A rated current, TM240 thermal-magnetic release, line protection design.","salesMarkdown":"It carries a TM240 thermal-magnetic release, meaning the thermal element is fixed at 125 A and the magnetic short-circuit pickup is set at 240 A — a standard combination for feeder circuits where you want overload protection at the conductor ampacity and a moderate magnetic threshold to ride out motor inrush on mixed loads. The 70 mm depth and 76.2 mm width fit the standard SENTRON 3VA mounting footprint, so it swaps directly into existing 3VA panel layouts without re-drilling the backplate. ## Breaking Capacity — What the Voltage Columns Tell You This breaker's interrupting capacity is specified per voltage level, which is how MCCBs are actually applied. At 240 V it clears 121 kA — that is the symmetrical RMS rating, high enough for most main service entrances on a 240/120 V split-phase or 240 V delta secondary. At 500 V and 690 V it holds at 11.9 kA, which is a standard interrupting level for 690 V industrial feeders. At 55 °C it drops to 122 A, at 60 °C to 120 A, and at 70 °C to 114 A. That is a shallow derating curve — about 0.2 A per degree above 50 °C — so in a warm panel with ambient near 60 °C you still get 120 A continuous. The 76.2 mm width (3 inches) is three 25.4 mm pole pitches — standard for a 3-pole MCCB in this frame size. The 70 mm depth (2.76 inches) leaves clearance for rear-connected busbars or cable lugs. The breaker ships without an undervoltage release or shunt trip (no voltage trigger), and without a ground-fault module.","metaTitle":"Siemens 3VA1112-4EF36-0AC0 SENTRON MCCB, 125 A, 3-Pole, TM24","metaDescription":"Siemens 3VA1112-4EF36-0AC0 SENTRON molded case circuit breaker, 125 A rated at 40 °C, 3-pole, TM240 release, 70 mm depth. 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":"125 A","at 45 °C":"125 A","at 50 °C":"125 A","at 55 °C":"122 A","at 60 °C":"120 A","at 65 °C":"117 A","at 70 °C":"114 A","Depth [In]":"2.76 in","Width [In]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","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":"28.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11124EF360AA0","Design Of The Auxiliary Switch":"2 auxiliary switches 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":"3VA9988-0AA12","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=181747&mlfb=3VA1112-4EF36-0AC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF36-0AC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1112-4EF36-0AC0 at 415 V?","answer":"At 415 V the interrupting rating is 75.6 kA symmetrical RMS. At 240 V it is 121 kA, and at 690 V it is 11.9 kA."},{"question":"What does the TM240 release designation mean?","answer":"TM240 means a thermal-magnetic release with a fixed thermal rating of 125 A (the breaker's continuous current) and a magnetic short-circuit pickup set at 240 A. The thermal element protects against overload; the magnetic element trips instantaneously on short-circuit currents above 240 A."},{"question":"Where can I buy 3VA1112-4EF36-0AC0?","answer":"This part is 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 are the physical dimensions of 3VA1112-4EF36-0AC0?","answer":"Width is 76.2 mm (3 in), height is 130 mm (5.12 in), and depth is 70 mm (2.76 in). These are the standard 3VA frame dimensions for a 3-pole MCCB."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-4EF36-0AC0","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/3VA1112-4EF36-0AC0 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}}