{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-4EF32-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-4EF32-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-4EF32-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF32-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA1112-4EF32-0KH0, 125 A at 40 °C, 3-pole, 121 kA interrupting at 240 V, line protection design.","salesMarkdown":"The Siemens SENTRON 3VA1112-4EF32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated 125 A continuous at 40 °C, with an interrupting capacity of 121 kA at 240 V AC and 75.6 kA at 415 V AC. ## Interrupting curve — where the real headroom lives This breaker's interrupting rating drops as voltage climbs: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V or 690 V. If your panel's available fault current at 480 V is, say, 65 kA, this breaker won't hold — the 52.5 kA at 440 V is the closest published point, and at 480 V the actual rating is lower still. For 480 V applications with high fault current, step up to a higher-rated frame. The 11.9 kA at 500/690 V confirms it's not a 690 V main breaker for high-fault installations. The 3VA1112-4EF32-0KH0 measures 130 mm high, 76.2 mm wide, and 70 mm deep. ## Auxiliary hardware — what's on board and what's not The shunt trip lets a PLC or safety relay cut power on command; the alarm switch signals a trip event back to the control system. If you need undervoltage protection or ground-fault sensing, that's an add-on or a different variant. ## Thermal derating — don't cook the trip curve Rated 125 A from 40 °C through 50 °C, then derates linearly: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, 114 A at 70 °C.","metaTitle":"Siemens 3VA1112-4EF32-0KH0 SENTRON MCCB, 125 A, 3-Pole, 121","metaDescription":"Siemens SENTRON 3VA1112-4EF32-0KH0 molded case circuit breaker, 125 A at 40 °C, 3-pole, 121 kA interrupting at 240 V. Current lifecycle. Sourced to order. Request RFQ.","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":"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":"28.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11124EF320AA0","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":"3VA9688-0BL33","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":"nut keeper kit on both ends","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=485735&mlfb=3VA1112-4EF32-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF32-0KH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-4EF32-0KH0 and how do I get a price?","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 quote."},{"question":"What is the closest functional second-source to 3VA1112-4EF32-0KH0?","answer":"The peer 3VA1110-5EF32-0AM0 is a lower-current variant in the same SENTRON 3VA frame. It shares the same 3-pole footprint and interrupting ratings, but its continuous current rating is lower — verify your load before substituting. The 3VA1112-5EE32-0AA0 is a different trip-unit design (electronic vs. thermal-magnetic) and may not drop in without coordination review."},{"question":"Will 3VA1112-4EF32-0KH0 drop into a panel specified around 3VA1110-5EF32-0AM0 without rewiring?","answer":"Yes — both are 3-pole SENTRON 3VA frames with the same 76.2 mm width and 130 mm height, so the busbar and DIN-rail mounting are identical. The 70 mm depth is also the same. No rewiring needed for the line and load connections, but verify the 125 A rating matches your load schedule."},{"question":"What compliance documentation does this brand provide for 3VA1112-4EF32-0KH0?","answer":"As a Siemens SENTRON MCCB, it carries the manufacturer's standard declarations — typically CE marking for the European market and UL/CSA listings for North America. RoHS and REACH compliance documentation is available from Siemens on request. The rated insulation voltage of 800 V and interrupting ratings at multiple voltage levels support IEC 60947-2 certification."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-4EF32-0KH0","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/3VA1112-4EF32-0KH0 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}}