{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4GE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4GE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4GE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4GE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4GE42-0AA0, molded case circuit breaker, 4-pole, 25 A, TM220 overcurrent release, line protection design, IP40 front.","salesMarkdown":"It carries a continuous 25 A at 40 °C and derates only slightly — still 24 A at 60 °C — so it holds its rating across typical enclosure ambient temperatures. The TM220 thermal-magnetic release handles overloads and short-circuits without an external trip unit. Four poles make it suitable for three-phase plus neutral or dual-supply configurations. This MCCB interrupts 121 kA at 240 V, 75.6 kA at 415 V, and still clears 11.9 kA at 690 V. Those are the maximum fault currents it can safely break at each voltage level — critical for sizing upstream protection and verifying the installation's available fault current stays within the device's rating. The 690 V figure (11.9 kA) is the same as at 500 V, so it handles high-voltage low-fault scenarios consistently. Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep — a standard SENTRON 3VA footprint that fits most DIN-rail or screw-mount panel layouts.","metaTitle":"Siemens 3VA1125-4GE42-0AA0 SENTRON MCCB, 25 A, 4-Pole, TM220","metaDescription":"Siemens 3VA1125-4GE42-0AA0 SENTRON molded case circuit breaker, 25 A rated, 4-pole, TM220 release. Breaking capacity 121 kA at 240 V. Active production. Sourced to order against RF","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":"25 A","Minimum":"25 A","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":"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":"100%","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":"S","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":"https://cdn.aoctrl.com/343ec2c26e68ab99e044c6bd69c59ddd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=303156&mlfb=3VA1125-4GE42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4GE42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-4GE42-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA1125-4GE42-0AA0 at 415 V?","answer":"75.6 kA at 415 V, with higher capacity at lower voltages (121 kA at 240 V) and 11.9 kA at 500 V and 690 V."},{"question":"Will 3VA1125-4GE42-0AA0 drop into a panel specified around 3VA1110-5ED32-0AA0 without rewiring?","answer":"Both are 4-pole SENTRON 3VA MCCBs with the same mounting footprint (130 x 101.6 x 70 mm) and IP40 front, so mechanical fit is identical. The key difference is the current rating: this one is 25 A versus 10 A for the 3VA1110-5ED32-0AA0. If the panel wiring and bus bars are sized for 25 A, it drops in; if the original circuit was limited to 10 A, the breaker will allow higher load current than the conductors may be rated for — verify the wire gauge and upstream protection before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4GE42-0AA0","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/3VA1125-4GE42-0AA0 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}}