{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ATV21WD45N4","brand":"Schneider Electric","brandSlug":"schneider","productSlug":"ATV21WD45N4","canonicalUrl":"https://aoctrl.com/schneider/ATV21WD45N4","factsUrl":"https://aoctrl.com/api/mcp/products/ATV21WD45N4","rawCanonicalId":null},"summary":{"shortDescription":"Schneider Electric Altivar 21 ATV21WD45N4 variable frequency drive, 45 kW, 380-480 V 3-phase, 65.9 A line current at 480 V, integrated Class A EMC filter, Modbus RS-485, IP20, 343 mm depth.","salesMarkdown":"## 45 kW VFD for HVAC pump and fan duty The Schneider Electric ATV21WD45N4 is a 45 kW Altivar 21 variable frequency drive designed for asynchronous motors in HVAC applications — pumps, fans, and compressors that run on a 380-480 V 3-phase supply. It delivers 65.9 A line current at 480 V and 83.8 A at 380 V, with an apparent power rating of 61.9 kVA at 380 V. The drive is classified as mature in its lifecycle, meaning it is still available through distribution but is not the current-generation product. ## Switching frequency and derating The switching frequency is adjustable from 6 to 16 kHz, with a derating factor applied above 8 kHz. Running at 16 kHz quiets motor whine but reduces continuous output current — plan the thermal budget around the lower end of the range for full-rated power. Transient overtorque capability is 120% of nominal motor torque for 60 seconds, which handles short-duration load spikes like fan inertia during startup without tripping the drive. ## Integrated EMC filter and compliance stack A Class A EMC filter is integrated, meeting EN 55011 Class A Group 1 and multiple IEC 61800-3 environment categories (C1, C2, C3) for conducted and radiated emissions. The drive carries CE marking and complies with IEC 61800-5-1 for safety. Pollution degree 3 per IEC 61800-5-1 means the drive is rated for industrial environments with conductive pollution or dry non-conductive pollution that becomes conductive due to condensation — typical for non-conditioned plant floors. ## Dimensions and mounting The drive measures 34.6 in (880 mm) high, 11.2 in (284 mm) wide, and 13.5 in (343 mm) deep, with a heat sink for convection cooling. Mount vertically within ±10 degrees of plumb for proper airflow.","metaTitle":"Schneider Electric ATV21WD45N4 Altivar 21 VFD, 45 kW","metaDescription":"Schneider Electric ATV21WD45N4 Altivar 21 VFD, 45 kW, 380-480 V 3-phase. Mature lifecycle, quoted to order. Integrated Class A EMC filter, Modbus RS-485.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["AC Drive (VFD) 480V"],"specifications":{"Depth":"13.5 in (343 mm)","Phase":"3 phase","Width":"11.2 in (284 mm)","Height":"34.6 in (880 mm)","Marking":"CE","Category":"22158-ATV212 30 - 100 HP 460 VOLT","Standards":"IEC 61800-5-1 EN 61800-3 environments 2 category C3 EN 61800-3 environments 2 category C1 IEC 61800-3 environments 2 category C3 IEC 61800-3 environments 1 category C2 EN 61800-3 environments 1 category C1 EN 61800-5-1 EN 61800-3 category C2 IEC 61800-3 environments 1 category C3 EN 61800-3 environments 1 category C3 IEC 61800-3 environments 2 category C2 EN 61800-3 environments 1 category C2 IEC 61800-3 environments 2 category C1 IEC 61800-3 category C2 IEC 61800-3 category C3 EN 61800-3 category C3 EN 61800-3 EN 55011 class A group 1 EN 61800-3 environments 2 category C2 IEC 61800-3 environments 1 category C1 IEC 61800-3","Diagnostic":"1 LED (red) for DC bus energized","EMC filter":"Class A 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","Line current":"65.9 A 480 V 83.8 A 380 V","Apparent power":"61.9 kVA 380 V","Assembly style":"With heat sink","Component name":"ATV21","Connector Type":"1 RJ45","Motor power kW":"45 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":"Read device identification (43) Monitoring inhibitable Write single register (06) Time out setting from 0.1 to 100 s Read holding registers (03) 2 words maximum Write multiple registers (16) 2 words maximum","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":"Automatic whatever the load Adjustable Not available in voltage/frequency ratio motor control","Maximum transient current":"103.4 A 60 s","Product or Component Type":"Variable speed drive","Maximum Horse Power Rating":"60 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":"94 A 380 V 94 A 460 V","Asynchronous motor control profile":"Constant voltage/frequency ratio with automatic IR compensation Quadratic voltage/frequency ratio Energy saving ratio Current flux vector control (FVC) without speed feedback Constant voltage/frequency 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/ATV21WD45N4/variable-speed-drive-atv21-45kw-60hp-480v-emc-filter-class-a-ip54/","alternativesUrl":"https://aoctrl.com/api/mcp/products/ATV21WD45N4/alternatives.json"},"ai":{"faq":[{"question":"What communication protocols does the ATV21WD45N4 support?","answer":"The drive includes a 2-wire RS-485 Modbus RTU interface (9600 or 19200 bps) and supports optional communication cards for BACnet, LonWorks, Metasys N2, and Apogee FLN."},{"question":"What is the ATV21WD45N4's depth?","answer":"The depth is 13.5 inches (343 mm), with a height of 34.6 inches (880 mm) and width of 11.2 inches (284 mm)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/schneider/ATV21WD45N4","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/ATV21WD45N4 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}}