{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ATV21WD37N4C","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"ATV21WD37N4C","canonicalUrl":"https://aoctrl.com/schneider/ATV21WD37N4C","factsUrl":"https://aoctrl.com/api/mcp/products/ATV21WD37N4C","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Altivar 21 ATV21WD37N4C AC drive, 37 kW, 380-480 V 3-phase, 54.4 A line current at 480 V, integrated Class B EMC filter, IP20, 343 mm depth.","salesMarkdown":"## 37 kW, 380-480 V — HVAC-duty VFD with integrated EMC filter The ATV21WD37N4C is a 37 kW Altivar 21 AC drive designed for asynchronous motors in HVAC, pumping, and fan applications. It accepts a 380-480 V 3-phase supply and delivers 54.4 A line current at 480 V (68.9 A at 380 V). An integrated Class B EMC filter meets EN 55011 Group 1 Class B, which simplifies panel layout by eliminating the need for an external filter in most commercial installations. The drive carries CE marking and complies with IEC 61800-3 across multiple environment categories (C1, C2, C3), so it fits both residential and industrial EMC zones. ## Switching frequency, torque, and speed regulation Switching frequency is adjustable from 6 to 16 kHz; above 8 kHz a derating factor applies, so plan for reduced continuous current if motor noise suppression is the priority. Transient overtorque reaches 120 % of nominal motor torque for 60 seconds, useful for breakaway loads on conveyors or fans. Speed accuracy is ±10 % of nominal slip from 0.2 Tn to Tn, with an adjustable PI regulator loop for closed-loop process control. Torque accuracy is ±15 %, adequate for most HVAC and pumping duty where precise torque holding is not critical. ## Dimensions, mounting, and environmental ratings The drive measures 34.6 in (880 mm) high by 11.2 in (284 mm) wide by 13.5 in (343 mm) deep — a tall, narrow footprint that fits standard 600 mm deep cabinets. Mounting is vertical within ±10°, with a heat sink assembly for convection cooling.","metaTitle":"Schneider Electric ATV21WD37N4C AC Drive, 37 kW, 480 V","metaDescription":"Schneider Electric ATV21WD37N4C Altivar 21 AC drive, 37 kW, 380-480 V 3-phase, 54.4 A line current at 480 V, integrated Class B EMC filter, mature lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Unclassified"],"specifications":{"Depth":"13.5 in (343 mm)","Phase":"3 phase","Width":"11.2 in (284 mm)","title":"ATV21WD37N4C","Height":"34.6 in (880 mm)","Marking":"CE","Category":"22158-ATV212 30 - 100 HP 460 VOLT","Standards":"IEC 61800-3 environments 2 category C1 EN 61800-3 environments 1 category C2 IEC 61800-3 environments 2 category C2 IEC 61800-5-1 IEC 61800-3 EN 61800-3 environments 2 category C1 EN 61800-3 environments 1 category C3 IEC 61800-3 environments 2 category C3 EN 61800-3 category C1 EN 61800-3 environments 1 category C1 IEC 61800-3 environments 1 category C1 EN 61800-3 environments 2 category C3 IEC 61800-3 environments 1 category C2 EN 61800-3 environments 2 category C2 EN 61800-3 IEC 61800-3 category C1 EN 55011 group 1 class B EN 61800-5-1 IEC 61800-3 environments 1 category C3","Diagnostic":"1 LED (red) for DC bus energized","EMC filter":"Class B EMC filter integrated","Data format":"8 bits, 1 stop, odd even or no configurable parity","Noise level":"64 dB 86/188/EEC","Option card":"Communication card APOGEE FLN Communication card BACnet Communication card LonWorks Communication card METASYS N2","Speed range":"1...10","description":"variable speed drive ATV21 - 37kW, 50HP - 480V - Class B EMC filter - IP54","Line current":"54.4 A 480 V 68.9 A 380 V","Apparent power":"52 kVA 380 V","Assembly style":"With heat sink","Component name":"ATV21","Connector Type":"1 RJ45","Motor power kW":"37 kW","Output voltage":"= 1 mOhm 500 V DC for 1 minute","Speed accuracy":"+/- 10 % of nominal slip 0.2 Tn to Tn","Regulation loop":"Adjustable PI regulator","Torque accuracy":"+/- 15 %","lifecycle_stage":"mature","Pollution degree":"3 IEC 61800-5-1","Range of Product":"Altivar 21","Shock resistance":"15 gn 11 ms IEC 60068-2-27","Relative humidity":"5...95 % without condensation IEC 60068-2-3 5...95 % without dripping water IEC 60068-2-3","Transmission Rate":"9600 bps or 19200 bps","Operating position":"Vertical +/- 10 degree","Physical interface":"2-wire RS 485","Transmission frame":"RTU","Dielectric strength":"3535 V DC between earth and power terminals 5092 V DC between control and power terminals","Number of addresses":"1...247","Product destination":"Asynchronous motors","Switching frequency":"6...16 kHz adjustable 8...16 kHz with derating factor","Frequency resolution":"Analog input 0.024/50 Hz Display unit 0.1 Hz","Power Supply Voltage":"380...480 V - 15...10 %","Transient overtorque":"120 % of nominal motor torque +/- 10 % 60 s","Type of polarization":"No impedance","Vibration resistance":"1 gn (f= 13...200 Hz) conforming to EN/IEC 60068-2-8 1.5 mm (f= 3...13 Hz) conforming to EN/IEC 60068-2-6","Communication Service":"Monitoring inhibitable Read holding registers (03) 2 words maximum Write single register (06) Read device identification (43) Write multiple registers (16) 2 words maximum Time out setting from 0.1 to 100 s","Power Supply Frequency":"50...60 Hz - 5...5 %","IP degree of protection":"IP54 EN 60530 IP54 EN 61800-5-2 IP54 IEC 60529 IP54 IEC 61800-5-1","Motor slip compensation":"Adjustable Automatic whatever the load Not available in voltage/frequency ratio motor control","Maximum transient current":"86.9 A 60 s","Product or Component Type":"Variable speed drive","Maximum Horse Power Rating":"50 hp","Communication Port Protocol":"Modbus","Nominal switching frequency":"8 kHz","Power Supply Voltage Limits":"323...528 V","Environmental characteristic":"Classes 3C1 conforming to IEC 60721-3-3 Classes 3S2 conforming to IEC 60721-3-3","Product Specific Application":"Pumps and fans in HVAC","Speed drive output frequency":"0.5...200 Hz","maximum prospective line Isc":"22 kA","Electromagnetic compatibility":"1.2/50 µs - 8/20 µs surge immunity test level 3 conforming to IEC 61000-4-5 Conducted radio-frequency immunity test level 3 conforming to IEC 61000-4-6 Electrical fast transient/burst immunity test level 4 conforming to IEC 61000-4-4 Electrostatic discharge immunity test level 3 conforming to IEC 61000-4-2 Radiated radio-frequency electromagnetic field immunity test level 3 conforming to IEC 61000-4-3 Voltage dips and interruptions immunity test conforming to IEC 61000-4-11","Power Supply Frequency Limits":"47.5...63 Hz","Maximum Continuous Output Current":"79 A 380 V 79 A 460 V","Asynchronous motor control profile":"Current flux vector control (FVC) without speed feedback Constant voltage/frequency ratio with automatic IR compensation Quadratic voltage/frequency ratio Constant voltage/frequency ratio Energy saving ratio","Ambient Air Temperature for Storage":"-13...158 °F (-25...70 °C)","Ambient air temperature for operation":"14...104 °F (-10...40 °C) (without derating) 104...122 °F (40...50 °C) (with derating factor)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://www.se.com/vn/en/product/ATV21WD37N4C/variable-speed-drive-atv21-37kw-50hp-480v-class-b-emc-filter-ip54/","alternativesUrl":"https://aoctrl.com/api/mcp/products/ATV21WD37N4C/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy ATV21WD37N4C and how do I get a price?","answer":"The ATV21WD37N4C is sourced through independent distribution channels. Submit an RFQ for current pricing and availability — the quote will reflect the BOM quantity and lead time at the time of request."},{"question":"What compliance documentation does Schneider Electric provide for ATV21WD37N4C?","answer":"The drive carries CE marking and complies with IEC 61800-3 (multiple environment categories), IEC 61800-5-1, and EN 55011 Group 1 Class B for EMC. The integrated Class B filter is standard. RoHS and REACH declarations are typically available from Schneider Electric's documentation portal."},{"question":"What is ATV21WD37N4C's listed depth?","answer":"The depth is 13.5 in (343 mm). Combined with a height of 34.6 in (880 mm) and width of 11.2 in (284 mm), it fits standard 600 mm deep enclosures when mounted vertically."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/ATV21WD37N4C","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/ATV21WD37N4C when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:21:01.794Z","lastPublished":"2026-09-02T08:21:01.794Z","indexable":true}}