{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF32-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF32-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF32-0KH0, molded case circuit breaker, 3-pole, 25 A rated at 40 °C, 121 kA breaking capacity at 240 V AC, line protection design, with shunt trip and auxiliary switches.","salesMarkdown":"The breaking capacity is 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 52.5 kA at 440 V — figures that give solid fault-clearing headroom for most low-voltage commercial and light industrial installations. At 690 V it still interrupts 11.9 kA, covering 690 V line-to-line systems where available. The maximum power loss is 8.5 W, a figure to factor into enclosure thermal calculations when grouping several breakers. The 25 A rating holds across 40 °C to 50 °C ambient without derating — at 55 °C it drops to 24 A, at 65 °C to 23 A, and at 70 °C still 23 A. That gives remote tripping capability and status feedback — useful for emergency-stop circuits or PLC-based monitoring where the breaker position needs to be known in the control system. A trip indicator and voltage trigger are present, so the breaker provides local visual indication of a trip event. That covers most indoor and sheltered outdoor installations, though the lower operating limit means it should not be relied upon for switching at sub-freezing temperatures without verifying the mechanism's performance. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a compact footprint that fits standard Siemens 3VA panel cutouts and busbar systems. The width is exactly 3 inches (76.2 mm), which matches the typical 3-pole MCCB mounting pitch in most distribution boards.","metaTitle":"Siemens 3VA1125-4EF32-0KH0 SENTRON MCCB, 25A, 3-Pole, 121kA","metaDescription":"Siemens 3VA1125-4EF32-0KH0 SENTRON molded case circuit breaker, 25A rated at 40°C, 3-pole, 121kA breaking capacity at 240V AC. Current production. Available 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":"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":"Yes","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","Of The Supplied Basic Switch":"3VA11254EF320AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"shunt trip (STL)","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":"3VA9688-0BL33","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=16721&mlfb=3VA1125-4EF32-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0KH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-4EF32-0KH0 and how do I get a price?","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":"Will 3VA1125-4EF32-0KH0 drop into a panel specified around 3VA1110-5ED36-0AC0 without rewiring?","answer":"Both are 3-pole SENTRON 3VA breakers with the same 76.2 mm width and 130 mm height, so the mounting footprint and busbar connection pitch are identical. The 3VA1125-4EF32-0KH0 is a 25 A frame versus the 3VA1110's 10 A rating, so the line and load conductors must be sized for 25 A. If the existing wiring is rated for 25 A, it drops in without panel rework."},{"question":"What compliance documentation does this brand provide for 3VA1125-4EF32-0KH0?","answer":"Siemens SENTRON 3VA breakers carry CE marking for the European market and are designed to meet IEC 60947-2. UL and CSA listings are available on specific variants — verify the exact order code against the manufacturer's declaration. RoHS and REACH compliance documentation is provided by Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0KH0","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/3VA1125-4EF32-0KH0 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}}