{"product_id":"schneider-altivar21-atv21hu40n4-hvac-vfd-4kw","title":"Schneider Electric ATV21HU40N4 Altivar 21 HVAC VFD 4kW","description":"\u003cdiv style=\"max-width:100%;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#1a1a1a;font-size:15px;line-height:1.6;overflow-wrap:anywhere;\"\u003e\n\u003ch2 style=\"font-size:22px;line-height:1.3;margin:0 0 12px;color:#1a1a1a;\" class=\"desc-model-title\"\u003eSchneider Electric ATV21HU40N4 Altivar 21 HVAC VFD, 4kW, 480V 3-Phase, IP20\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eThe \u003cstrong\u003eSchneider Electric ATV21HU40N4\u003c\/strong\u003e is an \u003cstrong\u003eAltivar 21 (ATV21) variable-speed drive\u003c\/strong\u003e engineered for \u003cstrong\u003eHVAC pumps and fans\u003c\/strong\u003e, rated \u003cstrong\u003e4 kW (5 hp)\u003c\/strong\u003e on a \u003cstrong\u003e380…480 V three-phase\u003c\/strong\u003e supply with a built-in \u003cstrong\u003eEMC filter (Class A)\u003c\/strong\u003e and \u003cstrong\u003eIP20\u003c\/strong\u003e protection. Technical data sourced from the official Schneider Electric datasheet (Altivar 21 4 kW platform). Supplied by SHLY-PLC, an independent industrial automation distributor; each unit is visually inspected and functionally checked before shipment.\u003c\/p\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #00838F;color:#1a1a1a;\"\u003eKey Features\u003c\/h2\u003e\n\u003cul style=\"margin:6px 0 14px 20px;padding:0;\"\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ATV21HU40N4 — Altivar 21 HVAC VFD\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eMotor Power:\u003c\/strong\u003e 4 kW (5 hp)\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eSupply:\u003c\/strong\u003e 380…480 V AC three-phase, 50\/60 Hz\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eEMC:\u003c\/strong\u003e built-in Class A filter · IP20\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eLifecycle:\u003c\/strong\u003e Discontinued — replaced by ATV212\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #00838F;color:#1a1a1a;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cp style=\"font-size:13px;color:#666666;margin:0 0 4px;\"\u003eOfficial Schneider Electric Product Data — ATV21HU40N4\u003c\/p\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;margin:6px 0 18px;font-size:14px;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#00838F;color:#ffffff;padding:7px 11px;text-align:left;vertical-align:top;word-break:break-word;font-weight:700;\"\u003eTechnical Specifications\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eProduct \/ Range\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eAltivar 21 (ATV21) · variable-speed drive for HVAC pumps and fans\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eMotor Power\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e4 kW (5 hp)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e380…480 V AC -15…+10 % · three-phase · 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eLine Current\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e6.4 A at 480 V · 8.1 A at 380 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eMax Continuous Output Current\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e9.1 A at 380 V · 9.1 A at 460 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eMax Transient Current\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e10 A for 60 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eApparent Power\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e6.9 kVA at 380 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eOutput Frequency\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e0.5…200 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eSwitching Frequency\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e12 kHz nominal (6…16 kHz adjustable, derating above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eSpeed Range\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e1…10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eCommunication\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eModbus (9600\/19200 bps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eEMC Filter\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eClass A, integrated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eDegree of Protection\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eIP20 \/ IP21 \/ IP41 (per mounting) · EN\/IEC 60529, 61800-5-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eEAN \/ GTIN\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003e3389119209755\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:42%;padding:7px 11px;border-bottom:1px solid #e6e8eb;background:#fafbfc;color:#333333;font-weight:600;text-align:left;vertical-align:top;word-break:break-word;\"\u003eAvailability Status\u003c\/td\u003e\n\u003ctd style=\"padding:7px 11px;border-bottom:1px solid #e6e8eb;vertical-align:top;word-break:break-word;\"\u003eDiscontinued (production ended 31 Dec 2012)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"font-size:13px;line-height:1.5;color:#004488;background:#f0f6ff;border-left:3px solid #00838F;padding:9px 12px;margin:12px 0;\"\u003e\n\u003cstrong\u003eModel note:\u003c\/strong\u003e \u003cstrong\u003eATV21HU40N4\u003c\/strong\u003e is an \u003cstrong\u003eAltivar 21\u003c\/strong\u003e HVAC variable-speed drive, 4 kW (5 hp), 380…480 V three-phase (N4 = 400\/480 V class), built-in EMC Class A filter, IP20, Modbus. This is a \u003cstrong\u003evariable-speed drive\u003c\/strong\u003e, not a soft starter. The ATV21 range was the HVAC variable-torque drive platform.\u003c\/div\u003e\n\u003cdiv style=\"font-size:13px;line-height:1.5;color:#004488;background:#f0f6ff;border-left:3px solid #00838F;padding:9px 12px;margin:12px 0;\"\u003e\n\u003cstrong\u003eRecommended replacement:\u003c\/strong\u003e Schneider Electric designates \u003cstrong\u003eATV212HU40N4\u003c\/strong\u003e — Altivar 212 VFD, 4 kW, 5 hp, 480 V three-phase, EMC, IP21 as the successor to the discontinued ATV21 4 kW model (Altivar 21 → Altivar 212 migration). Contact us for ATV212 migration support.\u003c\/div\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eCompatibility \u0026amp; Cross-References\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eAltivar 21 series (ATV21H\/N, 0.75…75 kW HVAC drives). This listing is provided by an independent industrial automation distributor; brand names and part numbers are used for product identification only.\u003c\/p\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #00838F;color:#1a1a1a;\"\u003eApplications\u003c\/h2\u003e\n\u003cul style=\"margin:6px 0 14px 20px;padding:0;\"\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003eHVAC variable-torque loads — fans, pumps, heating, ventilation and air-conditioning\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003eFluid-management and tertiary-sector building applications\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003eSpare\/obsolete replacement for installed ATV21 installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #00838F;color:#1a1a1a;\"\u003eWarranty \u0026amp; Shipping\u003c\/h2\u003e\n\u003cul style=\"margin:6px 0 14px 20px;padding:0;\"\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Stock and condition vary; contact us for real-time stock status and tested condition.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eInspection \u0026amp; testing:\u003c\/strong\u003e each unit is visually inspected and functionally checked before packing.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 6px;line-height:1.55;\"\u003e\n\u003cstrong\u003eDelivery:\u003c\/strong\u003e orders are processed within 2-4 business days after payment confirmation; standard worldwide delivery about 5-8 business days, express available, free shipping over $500.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12-month seller warranty provided by SHLY-PLC. See our \u003ca href=\"\/pages\/return-policy\"\u003eReturn Policy\u003c\/a\u003e for coverage and claims.\u003c\/p\u003e\n\u003cdiv style=\"font-size:13px;line-height:1.5;color:#555555;background:#f7f7f8;border-left:3px solid #00838F;padding:9px 12px 0 12px;margin:12px 0;\"\u003eIndependent supplier: Schneider Electric part ATV21HU40N4 is supplied by SHLY-PLC, an independent industrial automation distributor. Brand names and part numbers are used for product identification and remain the property of their respective owners; this listing is not affiliated with, sponsored or endorsed by the manufacturer.\u003c\/div\u003e\n\u003ch2 style=\"font-size:18px;line-height:1.3;margin:22px 0 10px;padding:0 0 6px;border-bottom:2px solid #00838F;color:#1a1a1a;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: What is the ATV21HU40N4?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: A Schneider Electric Altivar 21 HVAC variable-speed drive, 4 kW (5 hp), 380…480 V three-phase, IP20.\u003c\/p\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: Is it still in production?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: No — production ended 31 Dec 2012; successor is ATV212HU40N4.\u003c\/p\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: Is it a VSD or soft starter?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: A variable-speed drive (HVAC variable-torque).\u003c\/p\u003e\n\u003ch3 style=\"font-size:15px;line-height:1.4;margin:14px 0 3px;color:#1a1a1a;\"\u003eQ: What EMC\/protection?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;line-height:1.6;\"\u003eA: Built-in EMC Class A filter; IP20\/IP21\/IP41 per mounting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:12px;color:#888888;text-align:center;margin:18px 0 4px;\"\u003eATV21HU40N4 · Altivar 21 HVAC VFD · Technical reference data · Independently supplied by SHLY-PLC\u003c\/p\u003e\n\n","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":71136557924605,"sku":"ATV21HU40N4","price":2596.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/5665\/3309\/files\/ATV21HU40N4.jpg?v=1792545281","url":"https:\/\/shly-plc.com\/products\/schneider-altivar21-atv21hu40n4-hvac-vfd-4kw","provider":"SHLY-PLC","version":"1.0","type":"link"}