{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"VW3A7E102","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"VW3A7E102","canonicalUrl":"https://aoctrl.com/schneider/VW3A7E102","factsUrl":"https://aoctrl.com/api/mcp/products/VW3A7E102","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric VW3A7E102 resistance braking unit, 400 kW continuous power, 750 kW maximum permanent braking power at 400 V, for Altivar 61 and 71 variable speed drives.","salesMarkdown":"## Braking unit for Altivar 61/71 drives The VW3A7E102 is a resistance braking unit designed for Schneider Electric Altivar 61 and 71 variable speed drives, rated for drives up to 400 kW continuous power. Its maximum permanent braking power is 750 kW at 400 V, meaning it can safely dissipate regenerative energy from a decelerating motor load at that peak rate — essential for applications like centrifuges, winders, or high-inertia conveyors where the drive cannot absorb the braking energy internally. ## Braking capacity and resistor selection The unit engages at a DC bus voltage threshold of 785 V DC ±1 %, with a maximum DC bus voltage of 850 V — the chopper circuit switches the external resistor across the bus when the voltage rises above the threshold, preventing an overvoltage trip on the drive. The minimum resistor value to associate is 0.7 Ohm; selecting a resistor below this value risks overcurrent in the chopper IGBT, while a higher value reduces braking torque. The load factor varies with power: 15 % at 550 kW, 5 % at 750 kW, and 50 % at 440 kW, all at constant power and at the engage threshold — this duty cycle governs the resistor's thermal sizing, not just the peak power. Thermal losses are 750 W, dissipated as heat inside the enclosure; the unit requires 600 m³/h of cooling air volume to maintain the -10 to 50 °C operating ambient range. ## Installation environment and protection The unit is protected by an integrated thermal probe that monitors the heatsink temperature, and it must be mounted vertically per the operating position specification. Operating altitude is limited to 2000 m without derating. Vibration resistance is rated at 0.2 gn — the unit should be mounted on a rigid panel or backplate in the drive cabinet, not on a vibrating machine frame. ## Obsolete — sourcing through independent channels Schneider Electric has marked the VW3A7E102 as obsolete. The unit is available through independent surplus and broker channels. Quantities are lot-specific and confirmed at the time of RFQ.","metaTitle":"Schneider Electric VW3A7E102 Resistance Braking Unit, 750 kW","metaDescription":"Schneider Electric VW3A7E102 resistance braking unit for Altivar 61/71 drives. 750 kW max braking power, 400 kW continuous. Obsolete — sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["AC Drive (VFD) 480V"],"specifications":{"Load Factor":"15 % at 550 kW (at constant power and at engage threshold) 5 % at 750 kW (at constant power and at engage threshold) 50 % at 440 kW (at constant power and at engage threshold)","Thermal losses":"750 W","Protection type":"Integrated thermal protection by thermal probe","lifecycle_stage":"mature","Continuous power":"400 kW","Pollution degree":"2 conforming to EN 50178","Relative humidity":"Class 3K3 without condensation","Operating altitude":"2000 m","Operating position":"Vertical","Activation threshold":"785 V DC +/- 1 %","Vibration Resistance":"0.2 gn","Volume of cooling air":"600 m3/h","Maximum DC bus voltage":"850 V","Product or component type":"Resistance braking unit","Maximum Permanent Braking Power":"750 kW at 400 V (at constant power and at engage threshold)","Ambient air temperature for storage":"-25...70 °C","Minimum resistor value to associate":"0.7 Ohm","Ambient air temperature for operation":"-10...50 °C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/ie/en/product/VW3A7E102/resistance-braking-unit-400-kw-for-variable-speed-drive-altivar-61-71/","alternativesUrl":"https://aoctrl.com/api/mcp/products/VW3A7E102/alternatives.json"},"ai":{"faq":[{"question":"What is the maximum braking power of the VW3A7E102?","answer":"The maximum permanent braking power is 750 kW at 400 V, at constant power and at the engage threshold. The unit also supports 400 kW continuous power for the associated drive."},{"question":"What resistor value do I need for the VW3A7E102?","answer":"The minimum resistor value to associate is 0.7 Ohm. The load factor varies: 15 % at 550 kW, 5 % at 750 kW, and 50 % at 440 kW, all at constant power and at the engage threshold. The resistor must be sized for the duty cycle, not just the peak power."},{"question":"What are the cooling requirements for the VW3A7E102?","answer":"The unit requires 600 m³/h of cooling air volume and dissipates 750 W of thermal losses. The operating ambient temperature range is -10 to 50 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/VW3A7E102","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/schneider/VW3A7E102 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}}