{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-5EF36-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-5EF36-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-5EF36-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF36-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-5EF36-0KC0, 3-pole molded case circuit breaker (MCCB), 25 A rated continuous current, TM240 thermal-magnetic release, 187 kA breaking capacity at 240 V AC.","salesMarkdown":"The Siemens SENTRON 3VA1125-5EF36-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current at 40 °C, with a TM240 thermal-magnetic release that provides both overload and short-circuit protection in a single device. Its interrupting capacity reaches 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 440 V — figures that give you selectivity headroom in high-fault panels without cascading upstream breakers. ## Breaking capacity and thermal derating — the real selection numbers The 187 kA at 240 V is the headline, but the 121 kA at 415 V and 75.6 kA at 440 V are what matter for most 400 V-class industrial panels. The thermal derating curve is flat from 40 °C to 50 °C (full 25 A), then steps down: 24 A at 55 °C, 23.5 A at 60 °C, 23 A at 65 °C, and 22.5 A at 70 °C. ## Panel integration and auxiliary options The 3VA1125-5EF36-0KC0 includes a factory-fitted shunt trip (STL) release (order code 3VA9688-0BL33) and two auxiliary switches (HQ type). The shunt trip allows remote tripping from a PLC or emergency-stop circuit — verify the coil voltage matches your control supply. Front IP40 protection is standard for clean indoor panels; no washdown rating.","metaTitle":"Siemens 3VA1125-5EF36-0KC0 SENTRON MCCB, 25 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA1125-5EF36-0KC0 molded case circuit breaker, 3-pole, 25 A rated, TM240 release, 187 kA at 240 V. Current lifecycle. Sourced 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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 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":"23.5 A","at 65 °C":"23 A","at 70 °C":"22.5 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"Yes","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"2 auxiliary switches HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"25 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL33","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"25 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"160 A","Adjustable response value current / lr min.":"18 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"box terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (1.5 - 70 mm²)"}},"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=420882&mlfb=3VA1125-5EF36-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF36-0KC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-5EF36-0KC0 and get a price?","answer":"This MCCB is sourced to order through independent distribution. Submit an RFQ for current pricing and availability — both are confirmed at quote time."},{"question":"What is the closest functional second-source to 3VA1125-5EF36-0KC0?","answer":"The 3VA1110-5EE32-0JA0 is a lower-rated sibling (10 A, 25 kA at 415 V) in the same SENTRON 3VA family, but it lacks the 187 kA interrupting capacity and the shunt trip. For a direct drop-in with similar breaking performance, the 3VA1125-5EF36-0KC0 is the correct spec — the 3VA1110 is not a functional substitute for a 25 A, high-fault panel."},{"question":"What is the depth and width of 3VA1125-5EF36-0KC0?","answer":"Depth is 70 mm, width is 76.2 mm — standard SENTRON 3VA footprint that fits existing panel layouts and busbar systems without modification."},{"question":"Will 3VA1125-5EF36-0KC0 drop into a panel specified for 3VA1110-5EE32-0JA0?","answer":"Yes, the mounting footprint and depth are identical across the 3VA family — 70 mm depth, 76.2 mm width. No rewiring or busbar repositioning is needed, but verify the higher 25 A rating and 187 kA interrupting capacity match your panel's fault level and load current."},{"question":"What compliance documentation is available for 3VA1125-5EF36-0KC0?","answer":"The SENTRON 3VA series carries IEC/EN 60947-2 certification for molded case circuit breakers. RoHS and REACH declarations are standard from Siemens. UL/CSA listings are typical for the family but should be confirmed per the specific variant and target market."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-5EF36-0KC0","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/3VA1125-5EF36-0KC0 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}}