{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-6FE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-6FE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-6FE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-6FE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-6FE42-0AA0, molded case circuit breaker, 4-pole, 125 A, TM220 release, 220 kA at 240 V, line protection.","salesMarkdown":"## What this MCCB does on your line At 690 V it still clears 17 kA, which covers most industrial service-entrance scenarios. That gives you some tuning room for inrush without nuisance trips on transformer energization or capacitor banks. The 4-pole construction handles three-phase plus a switched neutral, common in North American and some IEC distribution panels where the neutral needs overcurrent protection. ## Thermal derating — the real-world current The 125 A rating holds up to 50 °C ambient. Above that it starts dropping: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. The 3VA1112-6FE42-0AA0 measures 70 mm deep, 101.6 mm wide, and 130 mm tall. That 101.6 mm width is exactly 4 inches — it occupies four standard 1-inch module spaces on a DIN rail, which is what you expect for a 4-pole MCCB in this class. Keep it inside the enclosure; don't mount it on a weather-exposed panel door. ## DC capability and special notes The maximum rated operational voltage for DC is 600 V. The manufacturer's manual covers DC switching values separately — the short-circuit protection design note references the 3VA molded case circuit breaker device manual for DC network applications. The N-conductor protection is set at 50%, meaning the neutral pole trips at half the phase rating, which is standard for 4-pole breakers where the neutral isn't expected to carry full phase current continuously.","metaTitle":"Siemens 3VA1112-6FE42-0AA0 SENTRON MCCB, 125 A, 4-Pole, 220","metaDescription":"Siemens 3VA1112-6FE42-0AA0 SENTRON molded case circuit breaker, 125 A, 4-pole, TM220 release, 220 kA at 240 V. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","at 240 V":"220 kA","at 415 V":"154 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 kA","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]":"4 in","Height [In]":"5.12 in","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","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","Courant permanent assigné Iu":"125 A","Ground-Fault Monitoring Version":"Without","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"TM220","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","design of the N-conductor protection":"50%","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"1 250 A","Adjustable response value current / li min.":"1 250 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"H","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Operating Cycles) / Typical":"20 000","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 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8fb1fd1ecc8ccaea59354e0a19ff0e45.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=753&mlfb=3VA1112-6FE42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-6FE42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VA1112-6FE42-0AA0 at 240 V?","answer":"220 kA at 240 V. At 415 V it's 154 kA, at 440 V it's 75.6 kA, and at 500 V or 690 V it's 17 kA."},{"question":"What does the TM220 release mean on this breaker?","answer":"TM220 is a thermal-magnetic release with a fixed 125 A thermal element and an adjustable magnetic pickup up to 1250 A. The thermal part protects against overloads; the magnetic part handles short circuits with adjustable instantaneous trip."},{"question":"Where can I buy 3VA1112-6FE42-0AA0 and how is it quoted?","answer":"Sourced 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 depth of 3VA1112-6FE42-0AA0?","answer":"70 mm (2.76 inches). Width is 101.6 mm (4 inches), height is 130 mm (5.12 inches)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-6FE42-0AA0","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/3VA1112-6FE42-0AA0 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}}