Ecosine Flex FN3458

Ecosine Flex, 400-480 VAC 60 Hz 10% THDi Passive Harmonic Filters


Ecosine Flex, 400-480 VAC 60 Hz 10% THDi Passive Harmonic Filters

  • Reduce THDi to 10% (15% if no DC-Link present in the drive)
  • Filters for diode rectifier with and without DC-link choke and thyristor rectifier
  • Help to comply with EN 61000-3-12, IEEE 519 and other PQ standards
  • Increase the efficiency of energy utilization
  • Most compact design
  • Plug and play, ready to use

Features and Benefits

FN3458 (60 Hz) models of the Ecosine Flex product family represent the very compact economical series with a THDi performance of <10% for drives with 4% Ldc and <15% for drives without Ldc.

They are ideal for non-linear three-phase equipment with B6 rectifier front-end that do not require the industry leading <5% THDi performance provided by Schaffner Ecosine Evo filters.

The performance targets the requirement of EN 61000-3-12 and IEEE 519 for Isc/IL <50. Schaffner Ecosine filters help to unburden the electrical infrastructure from excess loading and heat caused by current harmonics, and therefore support a better utilization of electric system capacity.

Lower harmonics also reduce the risk of system resonances and potential downtime of sensitive electronic equipment.

FN3458 filters upgrade standard motor drives to low-harmonic drives quickly and easily.

Typical Applications

Equipment with front-end six-pulse rectifier
Motor drives
Factory automation equipment
Water/wastewater treatment facilities
Fan and pump applications
HVAC installations
Mission-critical processes

Technical Specifications

Nominal operating voltage

3x380 to 480 VAC ±10%

Overload capability

1.6x rated current for 1 minute, once per hour

Operating frequency

60 Hz ±1 Hz

Total harmonic current distortion THDi*

<10% @ rated power (with DC-Link choke 4%)

<15% @ rated power (without DC-Link choke or <4%)

Total demand distortion TDD

According to IEEE 519

Nominal motor drive input power rating

5 to 250 HP @ 480 VAC

High potential test voltage

P -> E 2480 VAC for 1 s

Earthing system



≥ 98% at rated voltage and power

Overvoltage category

OV III (IEC 60664-1 / UL 61800-5-1)

Temperature range (operation and storage)

–25°C to +45°C fully operational

+45°C to +70°C derated operation***

–25°C to +85°C transport and storage


Internal fan cooling or external fan cooling***

Protection category

IP 00, IP 20

Flammability corresponding to

UL 94V-2

Design corresponding to

UL/IEC 61800-5-1, EN 61800-5-1, CE (LVD2006/95/EC)

Choke: IEC 61558-2-20


100 kA

MTBF (Mil-HB-217F)

>300,000 h @ 45°C/480 V

* System requirements: THDv <2%, line voltage unbalance <1% Note: performance specifications in this datasheet refer to six-pulse diode rectifiers. SCR rectifier front-end will produce different results, depending upon the firing angle of the thyristors. ** External UL-rated fuses required. *** Please check the inlet air flow requirement for cooling, see below in this document and in the user and installation manual. **** Iderated = Inominal * √((70°C-Tamb)/25°C)

Typical electrical schematic


Approvals & Compliances

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