{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF32-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF32-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF32-0AH0, molded case circuit breaker, 3-pole, 25 A, TM240 thermal-magnetic release, 121 kA at 240 V, 70 mm depth, 76.2 mm width, 130 mm height.","salesMarkdown":"It's a line-protection device, not a motor-protective or ground-fault version — no undervoltage release, no phase-failure detection, no communication module onboard. For a panel-builder, that's a clean fit where you need a straight feeder breaker with no auxiliary logic. This MCCB delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. ## Thermal derating — continuous current across ambient temperature Above that it derates: 24 A at 55 °C, 23.5 A at 60 °C, 23 A at 65 °C, and 22.5 A at 70 °C. That's a shallow derating curve — you lose only 2.5 A over a 30 °C rise. For a panel running warm (say 55 °C near the top of a sealed enclosure), you still get 24 A of headroom. The rated insulation voltage is 800 V, and the operating range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. ## Physical fit and auxiliary contacts That gives you two form-C signals for status feedback and a dedicated alarm contact that changes state only on a trip event, not on manual switching.","metaTitle":"Siemens 3VA1125-4EF32-0AH0 SENTRON MCCB, 25 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1125-4EF32-0AH0 molded case circuit breaker, 25 A rated, 3-pole, TM240 release. Breaking capacity 121 kA at 240 V. Active production. Quoted 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":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 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":"23.5 A","at 65 °C":"23 A","at 70 °C":"22.5 A","Trip indicator":"Yes","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","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 + 1 trip alarm switch 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":"without auxiliaryrelease","Ground fault monitoring version":"Without","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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching capacity class of the circuit breaker":"S","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":"lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 0"}},"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=516409&mlfb=3VA1125-4EF32-0AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0AH0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3VA1125-4EF32-0AH0?","answer":"Rated continuous current 25 A, 3-pole, TM240 thermal-magnetic release. Breaking capacity: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 11.9 kA at 690 V. Dimensions: 70 mm deep, 76.2 mm wide, 130 mm high."},{"question":"Where can I buy 3VA1125-4EF32-0AH0 and how is it quoted?","answer":"This part is sourced and quoted to order through independent distribution against an RFQ. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published here."},{"question":"Will 3VA1125-4EF32-0AH0 drop into a panel specified around 3VA1010-4ED32-0AC0?","answer":"No — the 3VA1010-4ED32-0AC0 is a different frame size and rating. The 3VA1125-4EF32-0AH0 has its own mounting footprint and terminal arrangement; a direct swap without rewiring or re-drilling is not supported."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0AH0","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/3VA1125-4EF32-0AH0 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}}