{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-4GD42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-4GD42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-4GD42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4GD42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-4GD42-0AA0, molded case circuit breaker, 4-pole, 125 A (40 °C), TM210 thermal-magnetic release, 121 kA at 240 V.","salesMarkdown":"## Line protection MCCB — 125 A, 4-pole, TM210 release The Siemens 3VA1112-4GD42-0AA0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection, rated 125 A continuous at 40 °C with a 4-pole design and a TM210 thermal-magnetic overcurrent release. It carries a 121 kA interrupting capacity at 240 V, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V — numbers that govern its fault-clearing capability in low-voltage distribution panels. The TM210 release means the thermal element tracks overloads (typically 1.05–1.3× In) while the magnetic instantaneous pickup is fixed at 10× In — a standard curve for feeder and main breaker duty where coordination with downstream branch breakers is the priority. The 125 A rating holds flat from 40 °C through 50 °C, 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 sealed, uncooled enclosure at 55 °C ambient, expect to lose 3 A of headroom — plan the load accordingly. Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a 4-pole footprint that fits standard Siemens SENTRON mounting bases. Maximum power loss is 28.1 W — a figure to include in the enclosure thermal budget, especially when multiple breakers are ganged in a row. The N-conductor protection is designed at 100 % — full-rated neutral protection for 4-pole applications where the neutral carries the same current as the phases, typical in data-center or harmonic-rich loads.","metaTitle":"Siemens 3VA1112-4GD42-0AA0 SENTRON MCCB, 125 A, 4-Pole, 121","metaDescription":"Siemens 3VA1112-4GD42-0AA0 SENTRON molded case circuit breaker, 125 A continuous at 40 °C, 4-pole, 121 kA at 240 V. TM210 release. 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":"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]":"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","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"125 A","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"TM210","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":"100%","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":"S","Max. rated operational current of the frame size":"160 A","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 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ba400f303384dafbe6d92a821ab69305.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=491968&mlfb=3VA1112-4GD42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-4GD42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1112-4GD42-0AA0 and how do I get a price?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ to confirm current availability and pricing."},{"question":"What is the interrupting capacity of 3VA1112-4GD42-0AA0 at 240 V?","answer":"121 kA at 240 V, stepping down to 75.6 kA at 415 V and 52.5 kA at 440 V."},{"question":"What is the continuous current rating of 3VA1112-4GD42-0AA0 at 40 °C?","answer":"125 A continuous at 40 °C, holding flat through 50 °C before derating."},{"question":"What overcurrent release does 3VA1112-4GD42-0AA0 use?","answer":"A TM210 thermal-magnetic release — thermal element tracks overloads, magnetic instantaneous pickup fixed at 10× In."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-4GD42-0AA0","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/3VA1112-4GD42-0AA0 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}}