{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF32-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF32-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF32-0KA0, molded case circuit breaker, 3-pole, 25 A rated current at 40 °C, TM240 thermal-magnetic release, shunt trip (STL), breaking capacity 121 kA at 240 V AC.","salesMarkdown":"The Siemens 3VA1125-4EF32-0KA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a 25 A rated current at 40 °C, confirmed across the ambient range up to 70 °C where it derates to 23 A. The 3-pole frame uses a TM240 thermal-magnetic overcurrent release, so the thermal element handles overloads and the magnetic element clears short-circuits — no electronic adjustment, just a fixed curve suited to feeder and branch-circuit protection. Breaking capacity is the headline number here: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Those are the maximum fault currents this MCCB can safely interrupt at each voltage level — critical when the available fault current at the panel is known. The rated insulation voltage is 800 V, so the internal clearances are sized for 690 V systems without derating the dielectric. This variant includes a shunt trip (STL) auxiliary release — a separate control voltage triggers the breaker open remotely, which is standard for emergency-stop circuits or interlocking schemes. The undervoltage release is not fitted on this order code, so if UV protection is required, that is a different variant. ## Sourcing & Lifecycle Lifecycle stage is current; Siemens still manufactures this order code as an active catalog item. ## Panel Fit & Integration Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. Mounts on DIN rail or backplate. Maximum power loss is 8.5 W, which is moderate for a 25 A MCCB. In a sealed enclosure with multiple breakers, that heat adds up — factor it into the thermal budget if the panel is densely populated. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C.","metaTitle":"Siemens 3VA1125-4EF32-0KA0 SENTRON MCCB, 25A, 3-Pole, Shunt","metaDescription":"Siemens 3VA1125-4EF32-0KA0 SENTRON molded case circuit breaker. 25A rated current, 3-pole, TM240 thermal-magnetic release, shunt trip. Breaking capacity 121kA at 240V. Active produ","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":"No","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 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":"0","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=297690&mlfb=3VA1125-4EF32-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0KA0/alternatives.json"},"ai":{"faq":[{"question":"What does the shunt trip (STL) release do on this MCCB?","answer":"The shunt trip allows remote tripping of the breaker by applying a separate control voltage. It is used in emergency-stop circuits, interlocking schemes, or remote shutdown applications."},{"question":"Will 3VA1125-4EF32-0KA0 drop into a panel specified around 3VA1110-5EF32-0LA0?","answer":"Both are 3-pole SENTRON MCCBs on the same 3VA frame, so the physical footprint — 130 mm height, 76.2 mm width, 70 mm depth — is identical. The difference is the current rating: 25 A on this unit versus the lower-rated sibling. Panel cutouts and DIN-rail mounting are interchangeable without rewiring, provided the feeder and load conductors are sized for 25 A."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0KA0","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/3VA1125-4EF32-0KA0 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}}