{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-5FF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-5FF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-5FF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5FF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1112-5FF42-0AA0, molded case circuit breaker, 4-pole, 125 A, TM240 release, 187 kA at 240 V AC, IP40 front, active production.","salesMarkdown":"## What this MCCB delivers — and what the ratings mean for your panel The Siemens SENTRON 3VA1112-5FF42-0AA0 is a 4-pole molded case circuit breaker rated 125 A continuous at 40 °C (derated to 114 A at 70 °C). It carries a TM240 thermal-magnetic release — fixed thermal trip, magnetic adjustment — sized for line protection in distribution panels. The interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415 V, and 76 kA at 440 V; at 500 V and 690 V it still holds 17 kA. That 187 kA figure means it can safely clear a fault at the main service entrance where available fault current is highest — a key spec for SCCR compliance in industrial switchboards. Insulation voltage is rated 800 V (Ui), so it handles 690 V systems without derating the dielectric gap. ## Panel fit and integration notes Dimensions: 130 mm high, 101.6 mm wide, 70 mm deep. The 4-pole width (101.6 mm) matches standard MCCB mounting footprints on DIN rail or panel-mount adapters. Front IP40 protection means it is suitable for enclosed distribution boards where no water ingress is expected. An optional motor drive (Product Extension / Optional / Motor Drive = Yes) allows remote trip or reset — useful for automated restart sequences. The N-conductor protection is set at 50% of the phase rating, which is the common setting for 4-pole breakers in TN systems where the neutral is not fully rated. ## Thermal derating — what the temperature table tells you The breaker holds its full 125 A rating from 40 °C through 50 °C. Above that, it derates linearly: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, 114 A at 70 °C. If your panel ambient runs above 50 °C, size the breaker for the actual load at that temperature — do not assume 125 A all the way. The maximum power loss is 28.1 W, which matters for thermal budgeting inside a sealed enclosure.","metaTitle":"Siemens 3VA1112-5FF42-0AA0 SENTRON MCCB, 125A 4-Pole, 187kA","metaDescription":"Siemens SENTRON 3VA1112-5FF42-0AA0 molded case circuit breaker, 125A, 4-pole, TM240 release, 187 kA at 240 V AC. Active production. Quoted on request.","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":"187 kA","at 415 V":"121 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","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":"M","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/13401a479067411cb8d8190fb56174cc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=159060&mlfb=3VA1112-5FF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5FF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3VA1112-5FF42-0AA0 and how is it quoted for volume purchases?","answer":"This part is sourced through independent distribution channels. It is quoted to order against an RFQ — availability and current pricing are confirmed at quote time. No minimum volume commitment is required for a quote."},{"question":"What is the interrupting capacity of 3VA1112-5FF42-0AA0 at 240 V?","answer":"At 240 V AC, the interrupting capacity is 187 kA. At 415 V it is 121 kA, at 440 V it is 76 kA, and at 500 V / 690 V it is 17 kA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-5FF42-0AA0","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/3VA1112-5FF42-0AA0 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}}