{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF32-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF32-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF32-0BH0, Molded case circuit breaker, 3-pole, 25 A, 121 kA at 240 V, with undervoltage release and 2 auxiliary switches + 1 trip alarm switch HQ.","salesMarkdown":"Its interrupting capacity reaches 121 kA at 240 V AC, 75.6 kA at 415 V, and still holds 11.9 kA at 690 V — so it handles high-fault scenarios downstream of a transformer or in a main feeder position without needing an upstream current-limiting fuse. The 25 A rating holds steady from 40 °C up to 50 °C, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C. For a panel running warm near the top of a cabinet, that derating curve means you don't have to oversize the frame — just account for the ambient temp when setting the load. The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or backplate mounting schemes.","metaTitle":"Siemens 3VA1125-4EF32-0BH0 SENTRON MCCB, 25A, 3-Pole, 121kA","metaDescription":"Siemens SENTRON 3VA1125-4EF32-0BH0 molded case circuit breaker, 25A rated, 3-pole, 121kA breaking capacity at 240V. Undervoltage release, 2 aux switches + trip alarm. Active produc","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":"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]":"3 in","Height [In]":"5.12 in","Trip Indicator":"Yes","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":"3VA11254EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch 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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=191086&mlfb=3VA1125-4EF32-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0BH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1125-4EF32-0BH0 at different voltages?","answer":"At 240 V it interrupts 121 kA, at 415 V it handles 75.6 kA, at 440 V it's rated for 52.5 kA, and at 500 V and 690 V it holds 11.9 kA. That covers most industrial distribution voltages from 208 V to 690 V."},{"question":"Where can I buy 3VA1125-4EF32-0BH0 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Does 3VA1125-4EF32-0BH0 include an undervoltage release?","answer":"Yes, it ships with an undervoltage release (UVR) as standard, plus 2 auxiliary switches and 1 trip alarm switch (HQ type) for remote status feedback."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0BH0","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/3VA1125-4EF32-0BH0 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}}