{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-3FF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-3FF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-3FF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-3FF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-3FF42-0AA0, molded case circuit breaker, 4-pole, 125 A (40 °C), TM240 thermal-magnetic release, breaking capacity 76 kA at 240 V AC.","salesMarkdown":"## Line protection MCCB — 125 A, 4-pole, TM240 release The 4-pole construction suits three-phase systems with a fully rated neutral — common in IT or TN-S networks where the neutral requires overcurrent protection. Breaking capacity is published across five voltage levels: 76 kA at 240 V AC, 53 kA at 415 V AC, 32 kA at 440 V AC, and 11.9 kA at both 500 V and 690 V AC. Current-carrying capacity is temperature-dependent across the operating range. Above 50 °C the rating steps down: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. Plan the enclosure ventilation and busbar sizing around the actual ambient temperature inside the panel — a 70 °C internal ambient reduces available current by nearly 9 % from the 125 A base. Physical footprint is 101.6 mm wide, 130 mm tall, and 70 mm deep — a 4-pole MCCB that fits standard Siemens SENTRON mounting accessories and busbar systems. The N-conductor protection is set at 50 % of the phase rating, a common configuration for distribution boards where the neutral is sized smaller than the phases. Maximum power loss is 28.1 W. This figure drives the heat load inside the enclosure for thermal calculations, particularly in multi-breaker panels where cumulative losses affect the internal ambient temperature. The part carries an optional motor drive extension (Product Extension / Optional / Motor Drive = Yes), enabling remote motorized operation for integration into automated power-management systems — relevant for vessel automation and bridge-integrated switchgear where remote tripping and reset are required.","metaTitle":"Siemens 3VA1112-3FF42-0AA0 SENTRON MCCB, 125 A, 4-Pole, TM24","metaDescription":"Siemens 3VA1112-3FF42-0AA0 SENTRON molded case circuit breaker, 125 A at 40 °C, 4-pole, TM240 release, breaking capacity 76 kA at 240 V. Active production. Quoted to order.","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":"76 kA","at 415 V":"53 kA","at 440 V":"32 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]":"2.8 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","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":"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 IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg min.":"125 A","Adjustable response value current / li max.":"1 250 A","Adjustable response value current / li min.":"625 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":"N","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Mechanical Service Life (Switching 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 0 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8c22249a3db83a23b9a46f25e58a86f6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=245017&mlfb=3VA1112-3FF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-3FF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-3FF42-0AA0 and 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 commercial offer."},{"question":"What is the breaking capacity of 3VA1112-3FF42-0AA0 at 415 V?","answer":"The breaking capacity at 415 V AC is 53 kA. At 240 V it is 76 kA, at 440 V it is 32 kA, and at 500 V and 690 V it is 11.9 kA."},{"question":"What compliance documentation is available for 3VA1112-3FF42-0AA0?","answer":"As a Siemens SENTRON product, the 3VA1112-3FF42-0AA0 is designed to meet IEC 60947-2 and relevant UL/CSA standards. RoHS and REACH declarations are available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-3FF42-0AA0","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/3VA1112-3FF42-0AA0 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}}