{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EE46-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EE46-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EE46-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EE46-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EE46-0AA0, molded case circuit breaker, 25 A, 4-pole, TM220 thermal-magnetic release, 121 kA at 240 V.","salesMarkdown":"Breaking capacity is the headline number here: 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V. It's a line-protection version (Product version: Line protection) with no communication function and no ground-fault monitoring built in. If you need those, you're looking at a different variant in the 3VA family. The IP40 rating on the front means it's splash-resistant from the panel face but not washdown-rated — standard for indoor switchgear. ## Duty and derating in the enclosure Thermal derating is modest: the breaker carries 25 A at 45 °C and 50 °C, drops to 24 A at 55 °C and 60 °C, then to 23 A at 65 °C and 70 °C. That's a 2 A loss over a 25 °C rise — about 8% — so if your panel ambient runs hot near the upper operating limit of 70 °C, you still get 92% of rated current. Physical footprint: 101.6 mm wide (4 in), 130 mm tall (5.12 in), 70 mm deep (2.76 in). That's a standard 4-pole MCCB width — it'll fit a SENTRON panelboard or a DIN-rail adapter without surprises. Power loss is 8.5 W maximum, which is low enough that you don't need forced ventilation in a typical enclosure, but group it with other high-loss devices and check the thermal budget.","metaTitle":"Siemens 3VA1125-4EE46-0AA0 SENTRON MCCB, 25 A, 4-Pole, TM220","metaDescription":"Siemens SENTRON 3VA1125-4EE46-0AA0 molded case circuit breaker, 25 A rated, 4-pole, TM220 release. Breaking capacity 121 kA at 240 V. Current production. Sourced to order against R","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 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"24 A","at 60 °C":"24 A","at 65 °C":"23 A","at 70 °C":"23 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":"8.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Courant permanent assigné Iu":"25 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":"Without","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.":"320 A","Adjustable response value current / li min.":"320 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 (Operating Cycles) / Typical":"20 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f9918239532278ae5d4e6434aefac1e2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=318128&mlfb=3VA1125-4EE46-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EE46-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1125-4EE46-0AA0?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels."},{"question":"What is the breaking capacity of this MCCB at 240 V?","answer":"121 kA at 240 V AC. It also carries 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V."},{"question":"What does the TM220 release mean on this breaker?","answer":"TM220 is a thermal-magnetic release where the thermal element is fixed at the frame rating (25 A) and the magnetic short-circuit pickup is adjustable up to 320 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EE46-0AA0","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/3VA1125-4EE46-0AA0 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}}