{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-5EF36-0DC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-5EF36-0DC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-5EF36-0DC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF36-0DC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-5EF36-0DC0, molded case circuit breaker, 3-pole, 25 A rated at 40 °C, 187 kA interrupting at 240 V, undervoltage release, line protection design.","salesMarkdown":"## What this MCCB brings to a panel Rated 25 A continuous at 40 °C, it holds that full rating through 50 °C before a gentle derate begins — 24 A at 55 °C, 23 A at 70 °C — which buys headroom in a warm enclosure without upsizing the frame. That kind of SCCR muscle means it's suited for industrial mains where transformer capacity is large and fault current runs high. The UVR drops the breaker if control voltage falls below the dropout threshold, which is standard for emergency-stop circuits or mains-disconnect schemes where loss of control power should kill the load. ## Panel fit and footprint The 3VA1125-5EF36-0DC0 measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a 3-pole frame that fits standard DIN-rail or panel-mount cutouts in SENTRON distribution boards. Power loss is 11 W maximum at rated load, so thermal rise inside a sealed cabinet is manageable; group several of these in a row and the cumulative heat still stays within the derate curve if ambient is kept under 50 °C.","metaTitle":"Siemens 3VA1125-5EF36-0DC0 SENTRON MCCB, 25A, 3-Pole, 187kA","metaDescription":"Siemens SENTRON 3VA1125-5EF36-0DC0 molded case circuit breaker, 25A rated, 3-pole, 187kA interrupting at 240V. Active production. Undervoltage release. Quoted to order.","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":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 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":"3VA11255EF360AA0","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":"3VA9608-0BB25","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":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","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=123306&mlfb=3VA1125-5EF36-0DC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF36-0DC0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1125-5EF36-0DC0 at 240 V?","answer":"At 240 V the interrupting capacity is 187 kA, dropping to 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at both 500 V and 690 V."},{"question":"What does the undervoltage release do on this breaker?","answer":"The undervoltage release (UVR) trips the breaker when control voltage falls below its dropout threshold, providing automatic disconnection on loss of control power — typical for emergency-stop or mains-disconnect circuits."},{"question":"Where can I buy 3VA1125-5EF36-0DC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-5EF36-0DC0","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/3VA1125-5EF36-0DC0 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}}