NAC-20-472
20A industrial-grade EMI filter for high-current power supplies and motor drives
Product Overview
Description
The Cosel NAC-20-472 is a 20A industrial-grade EMI filter designed for high-current power supplies and motor drives. This filter provides 35dB attenuation across the conducted frequency range, helping equipment meet industrial EMC standards including EN 55032 Class A and EN 61000-6-2. The 20A current rating supports high-power applications up to approximately 4800W at 240VAC. Key features include 250VAC rating, rugged industrial-grade construction, two-stage filtering, and -25°C to +85°C operating temperature range. The panel mount design allows easy installation in control panels. With an MTBF of 1,000,000 hours and Cosel's 5-year warranty, this EMI filter offers reliable noise suppression for demanding industrial applications.
Product Series
NAC
Primary Application
Industrial power supplies
Key Features
- 20A high current rating for large power supplies
- 35dB attenuation for EMC compliance
- Rugged industrial-grade construction
- 250VAC rating for universal input
- Two-stage filtering design
- Panel mount for easy installation
- UL and CE certified
- 5-year standard warranty
Specifications
| Current Rating | 20A maximum |
|---|---|
| Voltage Rating | 250VAC |
| Frequency Range | 150kHz to 30MHz |
| Attenuation | 35dB typical |
| Leakage Current | <3.5mA at 250VAC |
| Insulation Resistance | >100MΩ at 500VDC |
| Dielectric Strength | 2000VAC for 1 minute |
| Operating Temperature | -25°C to +85°C |
| Dimensions | 80 x 60 x 100 mm (W x H x D) |
| Mounting | Panel mount with screws |
| Terminals | Screw terminals 10-18 AWG |
| Safety Standards | UL60939, EN60939 |
Applications
Industrial power supplies
Industrial automation and control
Motor drives
Motor drive and control systems
Factory automation
Industrial automation and control
Process control
Industrial automation and control
Machine tools
Electronic system design
Welding equipment
Electronic system design
Induction heating
Electronic system design
Renewable energy systems
Renewable energy systems
FAE Expert Insights
"The NAC-20-472 is our go-to filter for high-current industrial applications. The 20A rating handles large power supplies and motor drives with ease. While the 35dB attenuation is slightly lower than the EAC series, it's sufficient for most industrial EMC requirements. The industrial-grade construction withstands harsh factory environments. We've used these with Cosel's DPF480 and PLA600 power supplies with excellent results. For industrial applications requiring high-current filtering, this is a reliable and cost-effective choice."
High-current filtering for demanding industrial applications
— BeiLuo FAE Team, BeiLuo
Frequently Asked Questions
What power supplies can I use with NAC-20-472?
The NAC-20-472 supports high-power supplies up to approximately 4800W at 240VAC input. Compatible Cosel supplies include: DPF480-24S (480W); PLA600F-24 (600W); Multiple smaller supplies in parallel. Calculate total input current: Total output power / (efficiency x input voltage). Example: Two PLA600F-24 at 92% efficiency: Total output = 1200W; Input current = 1200W / (0.92 x 230V) = 5.7A; Well within 20A rating. Contact our FAE team for compatibility verification.
Supports supplies up to ~4800W. Calculate total input current. Contact us for verification.
How does NAC-20-472 compare to NAC-10-472?
The NAC-20-472 offers twice the current capacity (20A vs 10A): Physical size: Larger to accommodate higher current; Terminal size: Larger terminals for heavier wire; Attenuation: Similar 35dB performance; Leakage: Same <3.5mA specification; Cost: Higher due to larger components. Select NAC-20-472 for: Power supplies >1000W; Multiple supplies with combined current >10A; Future expansion headroom. Select NAC-10-472 for: Supplies <1000W; Cost-sensitive applications; Space-constrained panels. Contact our FAE team for selection guidance.
NAC-20-472 for >1000W supplies. NAC-10-472 for smaller supplies. Contact us for selection.
What wire gauge should I use with NAC-20-472?
Recommended wire gauges for NAC-20-472: 20A rating requires 12 AWG (4mm²) minimum for input and output wiring. Use 600V rated wire suitable for the application. Terminal capacity: 10-18 AWG (2.5-10mm²). Wiring best practices: Use ferrules on stranded wire for reliable connection; Keep wire lengths short between filter and power supply; Separate input and output wiring; Use twisted pairs for input wiring to reduce noise pickup. For high-current applications, proper wire sizing is critical for safety and performance. Contact our FAE team for wiring recommendations.
Use 12 AWG minimum for 20A. Use ferrules. Contact us for wiring design.
Can NAC-20-472 be used in motor drive applications?
Yes, the NAC-20-472 is suitable for motor drive applications: 20A rating supports most industrial motor drives; 35dB attenuation reduces conducted emissions from PWM switching; Rugged construction withstands industrial environments; -25°C to +85°C operation for factory conditions. Motor drive considerations: PWM switching generates high-frequency noise; Input filtering is essential for EMC compliance; Multiple drives may share one filter if total current within rating; Consider filter at drive input or central panel location. For multiple motor drives, calculate total input current and ensure within filter rating. Contact our FAE team for motor drive filtering design.
Suitable for motor drives. Calculate total current for multiple drives. Contact us for design.
What is the temperature derating for NAC-20-472?
The NAC-20-472 temperature characteristics: Full 20A rating to +50°C ambient; Derate linearly to 15A at +70°C; Derate to 10A at +85°C maximum. For high-temperature applications: Ensure adequate panel ventilation; Consider forced air cooling; Mount away from heat sources; Allow clearance for natural convection. The filter components are rated for industrial temperature ranges. For continuous operation at high ambient temperatures, apply appropriate derating. Contact our FAE team for high-temperature application guidance.
Full rating to 50°C, derate above. Ensure ventilation. Contact us for thermal design.