{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-6FF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-6FF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-6FF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-6FF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-6FF42-0AA0, 4-pole molded case circuit breaker (MCCB), line protection, rated 125 A continuous, TM240 thermal-magnetic release, interrupting capacity 220 kA at 240 VAC.","salesMarkdown":"## What this MCCB does — and the rating that decides the fit Its interrupting capacity is the headline number: 220 kA at 240 VAC, 154 kA at 415 VAC, and 76 kA at 440 VAC. The 125 A rating holds flat from 40 °C to 50 °C (125 A), then derates to 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. In a warm panel — say 55 °C ambient — you lose 3 A of headroom, so size the load circuit accordingly. ## Panel integration — footprint and mounting Dimensions: 101.6 mm wide, 130 mm high, 70 mm deep. The 101.6 mm width (4 inches) is the standard 4-pole MCCB footprint — it occupies four 25 mm module slots on a DIN rail or bolts directly to a mounting plate. Maximum DC operational voltage is 600 V, making it usable in DC bus or battery circuits up to that level. The TM240 release provides thermal (overload) and magnetic (short-circuit) protection; the 50% N-conductor protection setting means the neutral pole trips at half the phase current, typical for 4-wire systems with harmonic loads. Power loss is 28.1 W maximum — account for that in enclosure thermal calculations, especially when grouping multiple breakers. Endurance is rated at 20,000 cycles (mechanical/electrical latching). That is a maintenance interval, not a lifetime limit — plan inspection and contact replacement around that count for high-cycle applications like frequent motor starting. No communication module is fitted, and no ground-fault monitoring version. This is a plain thermal-magnetic breaker — no remote trip indication or earth-leakage sensing. If those are needed, look to the 3VA1 with electronic releases or the 3VA2 series with communication.","metaTitle":"Siemens 3VA1112-6FF42-0AA0 SENTRON MCCB, 4-Pole, 125 A, 220","metaDescription":"Siemens SENTRON 3VA1112-6FF42-0AA0 molded case circuit breaker, 4-pole, 125 A, TM240 release, 220 kA at 240 VAC. Current lifecycle stage. Quoted 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":"76 kA","at 500 V":"17 kA","at 690 V":"17 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]":"2.8 in","Width [in]":"4 in","Height [in]":"5.1 in","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","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":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"125 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","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","Design of the N-conductor protection":"50%","Reference code / acc. to DIN EN 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","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":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"H","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e9a8bdb18d103609ce8475e8e1e82c3a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=409794&mlfb=3VA1112-6FF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-6FF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1112-6FF42-0AA0 at different voltages?","answer":"At 240 V it is 220 kA, at 415 V it is 154 kA, at 440 V it is 76 kA, and at 500 V and 690 V it is 17 kA."},{"question":"Will 3VA1112-6FF42-0AA0 drop into a panel specified around 3VA1112-5EF32-0CA0?","answer":"Both are 4-pole 125 A SENTRON MCCBs with the same 101.6 mm width, 130 mm height, and 70 mm depth — they share the same footprint and mounting hole pattern. The difference is in the release: this one uses a TM240 thermal-magnetic release, while the 5EF32 variant uses a different release curve. If the panel wiring and bus bars are sized for a 125 A MCCB, this will physically fit without rewiring, but check the coordination study to confirm the release curve matches the original design."},{"question":"Where can I buy 3VA1112-6FF42-0AA0 and get current pricing?","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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-6FF42-0AA0","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/3VA1112-6FF42-0AA0 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}}