{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-5EF32-0CA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-5EF32-0CA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-5EF32-0CA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF32-0CA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-5EF32-0CA0, molded case circuit breaker, 3-pole, 25 A (40 °C), TM240 thermal-magnetic release, 187 kA interrupting at 240 V AC, undervoltage release, line protection design.","salesMarkdown":"The 25 A continuous rating holds across 40 °C to 50 °C ambient, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C — so in a warm panel you lose about 2 A, not the full rating. The interrupting capacity is the headline: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V. ## Built-in undervoltage release and insulation rating The TM240 release is thermal-magnetic: the thermal element handles overloads (slow trip on sustained overcurrent), the magnetic element handles short-circuit (instantaneous trip above a set threshold). No ground-fault monitoring, no communication function, and no voltage-trigger or trip indicator — this is a straightforward thermal-magnetic MCCB with UVR, not a smart breaker. That 76.2 mm width is three 25.4 mm pole spacings — standard for a 3-pole MCCB on a DIN rail or panel-mount base. Power loss is 11 W maximum, so heat dissipation is modest — no forced cooling needed in a typical panel.","metaTitle":"Siemens 3VA1125-5EF32-0CA0 SENTRON MCCB, 25 A, 3-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA1125-5EF32-0CA0 molded case circuit breaker, 25 A rated, 3-pole, 187 kA interrupting at 240 V. TM240 release, undervoltage release. Active production. Quoted to","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":"3VA11255EF320AA0","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":"3VA9608-0BB24","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":"M","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=221938&mlfb=3VA1125-5EF32-0CA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF32-0CA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VA1125-5EF32-0CA0 at 240 V?","answer":"187 kA at 240 V AC, which is the highest interrupting capacity in this family — suitable for high-fault-current service entrances."},{"question":"Where can I buy 3VA1125-5EF32-0CA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3VA1125-5EF32-0CA0?","answer":"The 3VA1110-5ED36-0AC0 is a smaller-frame sibling (lower amp rating, different release), but it shares the same 3-pole SENTRON platform and physical footprint — it will drop into the same panel cutout without rewiring, though the interrupting ratings and trip curve differ. Verify coordination before substituting."},{"question":"Does 3VA1125-5EF32-0CA0 include an undervoltage release?","answer":"Yes, it includes an undervoltage release (UVR) that trips the breaker when control voltage drops below the dropout threshold."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-5EF32-0CA0","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/3VA1125-5EF32-0CA0 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}}