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FC4 Fiches technique(PDF) 1 Page - Welwyn Components Limited

No de pièce FC4
Description  Fusible Carbon Film Resistors
Download  2 Pages
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Fabricant  WELWYN [Welwyn Components Limited]
Site Internet  http://www.welwyn-tt.com/
Logo WELWYN - Welwyn Components Limited

FC4 Fiches technique(HTML) 1 Page - Welwyn Components Limited

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Fusible Carbon
Film Resistors
FC4
Predictable fusing characteristics
Constant voltage fusing characteristics
Fuses at very low powers
Flame retardant lacquer
FC4
Power rating at 70°C
watts
0.33
Resistance range
ohms
1R0-5K1
TCR
ppm/°C
300
Resistance tolerance
%
5, 10
Standard values
E24 preferred
Thermal impedance
°C/watt
215
Ambient temperature range
°C
-55 to 125
General Note
Welwyn Components reserves the right to make changes in product specification without notice or liability.
All information is subject to Welwyn’s own data and is considered accurate at time of going to print.
© Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK
Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com
Electrical Data
Issue B · 03.02
A subsidiary of
TT electronics plc
Welwyn Components
166
Construction
The carbon film is deposited on a high purity ceramic rod.
End caps are fitted and termination wires welded to the caps.
The resistive film is adjusted to the required value by a special
helical cut; finally the flame retardant lacquer protection is
applied to the resistor body and marked with an indelible ink.
Terminations
Material
Solder-coated copper wire.
Strength
The terminations meet the requirements of
IEC 68.2.21
Solderability
The terminations meet the requirements of
IEC 115-1, Clause 4.17.3.2
Marking
Resistance value and tolerances are identified in accordance
with IEC62.4 - band colour code. A fifth (yellow) band
denotes that the product is fusible and suitable for use in
constant voltage applications.
Solvent Resistance
The body protection and marking are resistant to all normal
industrial cleaning solvents suitable for printed circuits.
Flammability
The resistor coating will not burn or emit incandescent
particles under any condition of applied temperature or
power overload.
Dimensions (mm) & Weight (g)
PCB
Min.
mounting
bend
Type
L Max
D Max
f min
d nom
centres
radius
Wt.nom
FC4
6.2
2.5
21.0
0.6
10.2
0.6
0.3
Physical Data
L
D
f
d


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