Schaffner FN 3025,FN 3026 Installation Manuallines
Schaffner EMV AG Nordstrasse 11 CH-4542 Luterbach
T +41 32 681 66 26 F +41 32 681 66 30 www.schaffner.com
safety for electronic systems
Installation guidelines FN 3025 and FN 3026
Thank you for choosing Schaffner FN 3025/FN 3026 filters to solve your EMC challenges. Please
follow the guidelines below to ensure a satisfying and reliable filter function for many years of
operation.
1. General guidelines
Q Mount the filter on a clean conductive surface (or DIN-rail) free of paint or lacquer.
Q Install the filter as close as possible to the noise source, using short direct wire connections.
Q Protect the filter from liquid, excessive dust and aggressive gases.
Q Do not expose the filters to conditions beyond specifications in the datasheet.
2. Installation and electrical connection
FN 3025/FN 3026 are delivered with
closed plastic safety covers and
unfastened terminals. To install the
filter please proceed as follows:
Q Mount the filter on a metal surface
with four appropriate screws and
washers or snap it onto a TS 35
DIN-rail.
Q First connect the green/yellow wire
to the earth stud of the filter.
Q Gently lift the two hinged plastic
covers.
Q Connect phase wires with cable
lugs by pushing down and
tightening the screws.
2004-176C
Q Please note the torque
recommendation on top of the
filter.
Q Push the covers back into their
locked position to finish the filter
installation.
Schaffner EMV AG
Installation guidelines FN 3025/FN 3026
2 of 2
3. Recommendations for the mechanical installation of FN 3025
10A types 20A types 30A types 50A types
Screw M4 (hex cap) M4 (hex cap) M4 (hex cap) M5 (hex cap)
Washer M4 (flat- & spring-
washer)
Tool ¼ inch nut
wrench size 7mm
M4 (flat- & springwasher)
¼ inch nut
wrench size 7mm
M 4 (flat- & springwasher)
¼ inch nut
wrench size 7mm
M5 (flat- & springwasher)
¼ inch nut
wrench size 8mm
Torque According to the property class of the screws and material grade of the mounting
area.
4. Recommendations for the electrical connection of FN 3025/FN 3026
10A types 20A types 30A types 50A types
Flex wire 1.3 - 2.5mm2 4 - 6mm2 8 - 10mm2 16 - 20mm2
AWG type wire AWG 16 -
AWG 13
AWG 12 AWG 10
AWG 8 - AWG 7 AWG 5 - AWG 4
Screw (included) M4 M4 M4 M5
Ring/fork lug
(W/d)*
Lug thickness:
– One lug used:
– Two lugs used:
Tool Cross recessed
max. 11mm
(9.5mm)/
min. Ø4.3mm**
1.0mm
0.8mm
wrench #2
max. 11mm
(9.5mm)/
min. Ø4.3mm**
1.0mm
0.8mm
Cross recessed
wrench #2
max. 11mm
(9.5mm)/
min. Ø4.3mm**
1.0mm
0.8mm
Cross recessed
wrench #2
max. 16.5mm
(15mm)/
min. Ø5.3mm**
1.5mm
1.0mm
Cross recessed
wrench #2
Torque 1.0 - 1.2Nm 1.0 - 1.2Nm 1.0 - 1.2Nm 1.9 - 2.2Nm
* Schaffner recommends the use of insulated and UL-recognized ring lugs or fork lugs of the
appropriate size.
** Specification in () relates to earth connector.
Indicated wire sizes are for field wiring; wire size may be reduced for chassis/cabinet wiring, especially
when fixing two wires in one terminal (respect your local cabinet installation standards).
The installation guidelines above need to be obeyed to ensure the expected filter function. All relevant
electrical and mechanical data can be found in the FN 3025/FN 3026 datasheet or the installation
guidelines. For further information please contact your local Schaffner partner.
www.schaffner.com
April 2007
2004-176C
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