{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-4EF36-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-4EF36-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-4EF36-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF36-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-4EF36-0HC0, 3-pole molded case circuit breaker, 125 A at 40 °C, interrupting capacity 121 kA at 240 V AC, line protection design, shunt trip release, 2 auxiliary switches HQ.","salesMarkdown":"Its interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC — that's the fault-clearing muscle you need when the available short-circuit current is high and you want selectivity upstream without blowing the main. The basic switch assembly carries order code 3VA11124EF360AA0. ## Mounting and fit — DIN-rail footprint, no surprises Width is 76.2 mm (3 in), depth 70 mm (2.76 in), height 130 mm (5.12 in). If you're swapping into an existing panel, measure the mounting depth: 70 mm leaves room for rear-connected busbars without crowding the backplane. ## Thermal derating — what the 125 A rating actually delivers Above that it starts to taper: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C.","metaTitle":"Siemens 3VA1112-4EF36-0HC0 SENTRON MCCB, 3-pole, 125 A, 121","metaDescription":"Siemens SENTRON 3VA1112-4EF36-0HC0 molded case circuit breaker, 3-pole, 125 A at 40 °C, interrupting capacity 121 kA at 240 V AC. Line protection with shunt trip and 2 aux switches","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":"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":"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","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":"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=225159&mlfb=3VA1112-4EF36-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF36-0HC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-4EF36-0HC0 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for current pricing and availability; stock and lead time are confirmed at quote time."},{"question":"Will 3VA1112-4EF36-0HC0 drop into a panel specified around 3VA1112-5EE32-0AA0 without rewiring?","answer":"Both are 3-pole SENTRON 3VA breakers sharing the same 76.2 mm width and DIN-rail mounting footprint, so the mechanical fit is the same. The difference is in the trip curve and accessories — the 4EF36 variant carries a shunt trip and two HQ aux switches, while the 5EE32 has a different internal configuration. Check the auxiliary wiring diagram before swapping; the busbar and load connections land the same way."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-4EF36-0HC0","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/3VA1112-4EF36-0HC0 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}}