{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-3EF32-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-3EF32-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-3EF32-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3EF32-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-3EF32-0BC0, molded case circuit breaker (MCCB), 3-pole, 25 A at 40 °C, interrupting capacity 75.6 kA at 240 V, 52.5 kA at 415 V, line protection, with undervoltage release and 2 auxiliary switches HQ.","salesMarkdown":"Its interrupting capacity hits 75.6 kA at 240 V and still holds 52.5 kA at 415 V — enough backbone for most commercial and light industrial service entrances where high fault current is a concern. ## What the interrupting ratings mean on site The 75.6 kA at 240 V and 52.5 kA at 415 V tell you this breaker clears a bolted fault at those levels without welding its contacts or venting arc gas into the enclosure. At 440 V it still manages 32 kA, and at 500 V or 690 V it holds 11.9 kA — that last figure matters if you're on a 690 V mining or pumping application. For a 25 A frame, those are high-interrupt numbers; you're buying headroom for a strong source side. ## Built-in release and aux switch config No communication module onboard, so it's a straight electromechanical breaker; you get the trip signal from the aux contacts, not over a bus. Rated 25 A from 40 °C to 50 °C ambient, then it drops to 24 A at 55–60 °C and 23 A at 65–70 °C. That's a shallow derating curve — you lose only 2 A over a 30 °C rise — so it stays usable in a warm panel without oversizing. Power loss runs 11 W max at full load, which is manageable for thermal calculations inside a closed enclosure.","metaTitle":"Siemens SENTRON 3VA1125-3EF32-0BC0 MCCB, 25 A, 3-Pole, 75.6","metaDescription":"Siemens SENTRON 3VA1125-3EF32-0BC0 molded case circuit breaker, 25 A rated at 40 °C, 3-pole, interrupting capacity 75.6 kA at 240 V. Active production, sourced to order against RFQ","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"76.2 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]":"3 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"11 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA11253EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"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","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=470510&mlfb=3VA1125-3EF32-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3EF32-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-3EF32-0BC0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the interrupting capacity of this MCCB at 415 V?","answer":"At 415 V the interrupting capacity is 52.5 kA, which covers most European-style commercial and industrial distribution panels."},{"question":"Does this breaker include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) fitted, plus two auxiliary switches (HQ type) for status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-3EF32-0BC0","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/3VA1125-3EF32-0BC0 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}}