Sine Wave Filters FN5040/FN5045

LC Sine Wave Filter for Motor Drives


LC Sine Wave Filter for Motor Drives

  • Smooth sine wave without voltage peaks
  • Perfect motor protection
  • Reduce bearing currents
  • Motor frequency up to 200 Hz
  • Extended motor cable length capability

Features and Benefits

Converts the rectangular PWM output voltage of motor drives into a smooth sine wave with low residual ripple
Elimination of premature motor damage caused by high dv/dt, overvoltages, cable ringing, motor overheating, and eddy current losses
Improves bearing life time because of bearing currents caused by circulating currents
Complies with IEC 60034-17* and NEMA-MG1 requirements for general purpose motors
Optional with NEMA 1 protective cover

Typical Applications

HVAC applications
Medium voltage applications, deployed in front of the step-up transformer
Retrofit installations with motor drives
Motor drive with long motor cable
Motor drive with multiple motors in parallel

Technical Specifications

Nominal operating voltage

3x480 VAC

Rated operating voltage

3x525 VAC

Motor frequency

0...70 Hz (up to 200Hz with derating (see graph))

Switching frequency

See filter selection table

Rated currents

4.5 to 1200 A @ 45°C

Motor cable length

Up to 2,000 m (see graph)

Impedance (uk)

8 to 10% @ 400 V, 50 Hz and rated current

Residual ripple voltage


High potential test voltage

P –> E 3000 VAC, 1 minute

P –> P 2500 VAC, 1 minute

Protection category

IP 00 (FN 5040)

IP 20 (FN 5045)

Overload capability

1.5× rated current for 1 minute, once per hour

Ambient temperature range

-25°C to +45°C fully operation

+45°C to 70°C derated operation*

-25°C to +85°C transport and storage

Insulation class

EIS 200

Flammability corresponding to

UL 94 V-2

Design corresponding to

Chokes: EN 61558-2-20 or EN 60076-6

Filter: UL 61800-5-1, EN 61800-5-1


>100,000 hours

Rated currents

4.5 to 1200 A @50°C (480 V filters)

* Iderated = Inominal*√((Tmax-Tamb)/(Tmax-Tnominal)) = Inom*√((70°C-Tamb)/25°C)

Typical electrical schematic


Approvals & Compliances

UL Recognized Label (USA)
RoHS Label
CE Label
UKCA Label

UL 61800-5-1 up to 750 A for FN 5040, 480 A for FN 5045. For use with AC or DC drives (power conversion equipment) only