{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-3EE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-3EE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-3EE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3EE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-3EE42-0AA0, molded case circuit breaker, 4-pole, 25 A rated at 40 °C, TM220 release, 75.6 kA breaking capacity at 240 V, line protection design.","salesMarkdown":"## Siemens 3VA1125-3EE42-0AA0 — 25 A 4-Pole MCCB with TM220 Release The Siemens 3VA1125-3EE42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 25 A at 40 °C ambient, with a 4-pole configuration and a TM220 thermal-magnetic overcurrent release. Its design is line protection, meaning it's sized for feeder and main distribution duty rather than dedicated motor or generator protection. Breaking capacity runs 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V — figures that cover most low-voltage distribution panels in North American and IEC markets. At 690 V it still clears 11.9 kA, so it handles the fault-current headroom in a 480Y/277 V or 400 V panel without cascading upstream. ## Thermal Derating and Ambient Range Maximum power loss is 8.5 W per pole, which factors into enclosure thermal calculations if you're stacking multiple breakers in a compact panel. It's a straight thermal-magnetic breaker with a TM220 release curve — no auxiliary contacts or remote signaling built in.","metaTitle":"Siemens 3VA1125-3EE42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 75.6","metaDescription":"Siemens 3VA1125-3EE42-0AA0 SENTRON molded case circuit breaker, 25 A rated at 40 °C, 4-pole, 75.6 kA breaking at 240 V. TM220 release, line protection. Active production. Quoted to","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","Maximum":"0 A","Minimum":"0 A","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"11.9 kA","at 690 V":"11.9 kA","at 40 °C":"25 A","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","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","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","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"N","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=35838&mlfb=3VA1125-3EE42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3EE42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1125-3EE42-0AA0 at 240 V?","answer":"75.6 kA at 240 V, with 52.5 kA at 415 V and 32 kA at 440 V."},{"question":"What overcurrent release does this MCCB use?","answer":"A TM220 thermal-magnetic release — fixed thermal and magnetic trip settings for line protection."},{"question":"Where can I buy 3VA1125-3EE42-0AA0 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-3EE42-0AA0","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/3VA1125-3EE42-0AA0 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}}