{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-3GD42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-3GD42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-3GD42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3GD42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-3GD42-0AA0, 4-pole molded case circuit breaker, 25 A, TM210 release, 75.6 kA at 240 V, IP40 front.","salesMarkdown":"## Siemens SENTRON 3VA1125-3GD42-0AA0 — 25 A 4-Pole MCCB, Line Protection Its TM210 thermal-magnetic release handles overload and short-circuit conditions without external trip units. The interrupting capacity hits 75.6 kA at 240 V and 52.5 kA at 415 V — enough for most industrial service-entrance or feeder applications where high fault current is expected. At 240 V the breaker clears 75.6 kA; at 415 V it handles 52.5 kA; at 440 V it drops to 32 kA, and at 500 V or 690 V it holds at 11.9 kA. That 75.6 kA figure at 240 V makes it a strong candidate for high-fault panels in North American 240/120 V split-phase or 240 V delta services. ## Thermal Derating and Ambient Performance At 55 °C it derates to 24 A, holds there through 60 °C, then drops to 23 A at 65 °C and 70 °C. That's a shallow derating curve — only 2 A lost over a 30 °C rise — so it's well suited for sealed enclosures or high-ambient panel rooms where other breakers would need a larger frame. The 3VA1125-3GD42-0AA0 measures 70 mm deep, 101.6 mm wide, and 130 mm tall. That 101.6 mm width (4 inches) is standard for a 4-pole MCCB in this frame size — it occupies four 25 mm pole positions on a DIN rail or panel-mount footprint. Front protection is IP40, so it's fine for indoor panel use but not washdown.","metaTitle":"3VA1125-3GD42-0AA0 SENTRON 4-Pole MCCB, 25 A, 75.6 kA at 240","metaDescription":"Siemens SENTRON 3VA1125-3GD42-0AA0 4-pole molded case circuit breaker, 25 A rated, TM210 release, 75.6 kA at 240 V. Current lifecycle. Sourced to order. Request RFQ.","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":"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":"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%","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":"https://cdn.aoctrl.com/a41e60032d514b17d9d22854a7ce7d78.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=145660&mlfb=3VA1125-3GD42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3GD42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1125-3GD42-0AA0?","answer":"Submit an RFQ through this listing. We source through independent distribution channels and confirm availability and current pricing at quote time — no automated stock figures here."},{"question":"What are the key interrupting ratings for 3VA1125-3GD42-0AA0?","answer":"75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at 500 V or 690 V."},{"question":"What is the physical size of 3VA1125-3GD42-0AA0?","answer":"70 mm deep, 101.6 mm wide, 130 mm tall — fits a standard 4-pole MCCB footprint on DIN rail or panel."},{"question":"What overcurrent release does this breaker use?","answer":"The TM210 thermal-magnetic release — a fixed-trip design with no interchangeable trip units."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-3GD42-0AA0","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/3VA1125-3GD42-0AA0 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}}