{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-4EF32-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-4EF32-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-4EF32-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF32-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-4EF32-0HC0, molded case circuit breaker, 3-pole, 125 A, TM240 thermal-magnetic release, 121 kA at 240 V, shunt trip STL, 2 auxiliary switches HQ.","salesMarkdown":"## 125 A MCCB with TM240 release — line protection for distribution panels Its 121 kA breaking capacity at 240 V and 75.6 kA at 415 V give it the headroom to clear high-fault currents in distribution panels without cascading failure upstream — a key spec when coordinating selectivity on a 400 V industrial service. The 125 A rating holds flat from 40 °C through 50 °C, then derates to 120 A at 55 °C, 117.5 A at 60 °C, 115 A at 65 °C, and 112.5 A at 70 °C. At 70 mm deep, 76.2 mm wide, and 130 mm tall, the 3VA1112-4EF32-0HC0 fits the standard 3VA fixed-pattern cutout. The 76.2 mm width (3-inch grid) matches the 3-pole footprint; if you are swapping from an older 3VF or 3VL series, verify the mounting hole pattern — the 3VA uses the same 4-hole bolt-on pattern as the 3VL, but the lug centers differ. The breaker ships with the shunt trip (STL) and 2 auxiliary switches HQ pre-installed; no field-assembly of those accessories needed. The interrupting rating steps down with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. For a 400 V panel with a transformer-fed bus that can deliver 65 kA fault current, the 75.6 kA at 415 V gives 10 kA of margin — enough to avoid an upstream breaker upgrade. The shunt trip (STL) release is wired to a separate control voltage — typically 110–240 VAC or 24 VDC — and fires the breaker open on command from a remote pushbutton, safety relay, or PLC output. The 2 auxiliary switches HQ (high-qualified) provide status feedback: one normally-open and one normally-closed contact per switch, rated for signal-level loads back to the controller.","metaTitle":"Siemens 3VA1112-4EF32-0HC0 SENTRON MCCB, 125 A, 3-Pole, TM24","metaDescription":"Siemens 3VA1112-4EF32-0HC0 SENTRON molded case circuit breaker, 125 A rated continuous current, 3-pole, TM240 thermal-magnetic release, 121 kA at 240 V. Active production. Sourced","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","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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":"120 A","at 60 °C":"117.5 A","at 65 °C":"115 A","at 70 °C":"112.5 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"Yes","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"125 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL30","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"125 A","Adjustable response value current / li max.":"1 250 A","Adjustable response value current / li min.":"625 A","Adjustable response value current / lr min.":"88 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=441509&mlfb=3VA1112-4EF32-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4EF32-0HC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-4EF32-0HC0 and get a price?","answer":"The 3VA1112-4EF32-0HC0 is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) with your quantity and target delivery window; availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional alternative to 3VA1112-4EF32-0HC0?","answer":"The closest functional sibling is 3VA1112-5EF32-0CA0, which shares the same 125 A frame, 3-pole count, and TM240 release but omits the shunt trip and auxiliary switches. If you need remote trip capability, the 4EF32-0HC0 is the variant with the STL pre-installed; the 5EF32-0CA0 would require field-addition of a shunt trip accessory."},{"question":"What compliance documentation is available for this MCCB?","answer":"The Siemens SENTRON 3VA series carries IEC/EN 60947-2 certification for molded case circuit breakers. Compliance documentation including RoHS and REACH declarations is provided by Siemens upon request through the standard documentation portal. The breaker is designed for use in IEC-based distribution systems; UL/CSA listing information should be confirmed against the specific variant's UL file."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-4EF32-0HC0","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/3VA1112-4EF32-0HC0 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}}