NF: Netzfilter (power line filter)

300: Rated continuous current 300 A

503: For 380–500 VAC three‑phase systems

Manufacturer: SEW‑EURODRIVE

Part Number: NF300-503

Input Voltage: 3‑phase AC 380–500 V (±10%), 50/60 Hz

Rated Current: 300 A (continuous)

Suitable Power: ~160–200 kW (for SEW high‑power drives)

Filter Type: 3‑stage EMC filter (common‑mode + differential‑mode)

Protection Class: IP20 (EN 60529)

Mounting: Panel‑mount (heavy‑duty cabinet installation)

Power Loss: ~180 W (at rated current)

Leakage Current: ≤ 50 mA

Temperature Range: −25 °C to +45 °C

Certifications: CE, UL, RoHS, cRUus

Ultra‑High Current Rating: 300 A continuous current for large‑scale drive systems.

Superior Attenuation: Strong suppression of 150 kHz–30 MHz noise, reducing THD significantly.

Bidirectional Isolation: Blocks drive‑generated noise to the grid and isolates grid disturbances.

Robust & Reliable: Heavy‑duty construction for continuous operation in harsh conditions.

Industrial automation: 160–200 kW servo and frequency converter systems.

Typical scenarios: Heavy machinery, metallurgical plants, large cranes, port equipment, and process lines.

Matches SEW high‑power drives (MOVIDRIVE MDX9 series) in 380–500 V networks.