{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5EF32-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5EF32-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5EF32-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF32-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5EF32-0KC0, molded case circuit breaker, 3-pole, 250 A, line protection, TM240 thermal-magnetic release, 187 kA at 240 V, shunt trip STL, 2 HQ auxiliary switches, IP40 front.","salesMarkdown":"Its 250 A rated continuous current (Iu) holds flat from 40 °C to 50 °C, then derates to 223 A at 70 °C; that thermal curve matters if your enclosure runs hot. The TM240 thermal-magnetic release handles the time-current coordination — thermal for overload, magnetic for short-circuit — and the shunt trip (STL) auxiliary release lets a remote signal or emergency-stop circuit trip the breaker independently of the overcurrent condition. Breaking capacity is the headline number for this class: 187 kA at 240 V, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. The 3-pole design covers three-phase systems. Two built-in auxiliary switches (HQ type) give you status feedback — open/closed indication for a PLC or panel lamp — without adding an external contact block. Footprint: 105 mm wide, 158 mm high, 70 mm deep. That 105 mm width (roughly 4.1 inches) is standard for a 250 A frame MCCB — it occupies three 35 mm DIN-rail modules plus some overhang for the case. The derating above 55 °C is already baked into the current table — no extra calculation needed if your ambient stays under 70 °C. ## What's included and what's not The breaker ships with the TM240 overcurrent release and the shunt trip STL installed. The integrated auxiliary trip order code is 3VA9688-0BL33 — that's the specific shunt trip module inside this variant. Two HQ auxiliary switches are factory-fitted. No undervoltage release, no communication module, no phase-failure detection, no ground-fault monitoring, and no trip indicator. If you need those, you're looking at a different order code in the 3VA family. Latching endurance rated at 15 000 cycles — that's the mechanical life for the switching mechanism under no-load or low-current conditions. Not a wear-out concern for a main breaker that cycles a few times a year, but worth noting if it's used for frequent load switching.","metaTitle":"Siemens 3VA1225-5EF32-0KC0 SENTRON MCCB, 250 A, 187 kA","metaDescription":"Siemens SENTRON 3VA1225-5EF32-0KC0 molded case circuit breaker, 250 A rated current, 187 kA breaking capacity at 240 V. 3-pole, line protection, TM240 release, shunt trip. Active p","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 mm","Height":"158 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"36 kA","at 690 V":"17 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243.3 A","at 60 °C":"236.5 A","at 65 °C":"229 A","at 70 °C":"223 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":"250 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.":"250 A","Adjustable response value current / li max.":"2 500 A","Adjustable response value current / li min.":"1 250 A","Adjustable response value current / lr min.":"175 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":"250 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"25 x 8","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1"}},"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=568682&mlfb=3VA1225-5EF32-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5EF32-0KC0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3VA1225-5EF32-0KC0?","answer":"70 mm. Overall dimensions: 105 mm wide, 158 mm high, 70 mm deep."},{"question":"Does 3VA1225-5EF32-0KC0 include a shunt trip?","answer":"Yes, it ships with a shunt trip (STL) auxiliary release factory-installed. The integrated auxiliary trip module order code is 3VA9688-0BL33."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5EF32-0KC0","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/3VA1225-5EF32-0KC0 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}}