Medium Power Film Capacitors
FPX (FPY RoHS Compliant)
PROTECTION
APPLICATIONS
Protection of thyristors.
Protection of gate turn-off thyristor (G.T.O.).
Clamping (Secondary snubber).
TECHNOLOGY
Metallized polypropylene dielectric capacitor with controlled
self-healing.
Reinforced metallization developed for high impulse currents.
Axial connections specially developed to reduce series
inductance and to provide rigid mechanical mounting.
PACKAGING MATERIAL
DIMENSIONS
Plastic Case Style M6 / 6 or M8 / 8
Max Torque: 8.5Nm (M8)
4.5Nm (M6)
h
±2
(0.079)
H 62
M6/6 or M8/8
Ø4 (0.16) A
TPC
Cylindrical in plastic case filled with thermosetting resin.
Outputs: threaded inserts either M6 or M8.
HOT SPOT TEMPERATURE CALCULATION
Plastic Case
H
±0.5
(0.020)
A
Tinned Output
Resin
h
±2
(0.079)
Ød
ØDmax
Dimensions: millimeters (inches)
General tolerance:
±2
Plastic Case Style M8 / 10
Max Torque: 8.5Nm
The positions of the connections
of each side are not indexed
H
≥
79 +0 -3.0mm
(3.11 +0 -0.12)
Ø4 (0.16) A
Ø28 (1.103)
±0.1
(0.004)
Plastic Case
M8 (0.315)
/10 (0.394)
TPC
M8 (0.315)
/10 (0.394)
A
D Max
Tinned Output
Resin
23 (0.906)
±0.50
(0.020)
6.00 (0.236)
6.00 (0.236)
Dimensions: millimeters (inches)
General tolerance:
±2
MARKING
Logo
Withstanding surge voltage
Capacitance and tolerance in clear
Nominal DC voltage in clear
RMS current in clear
Date of manufacture (IEC coding)
See Hot Spot Temperature page 3.
θ
hot spot
=
θ
terminals
+ (P
d
+ P
t
) x R
th
with
P
d
(Dielectric losses) = Q x tgδ
0
⇒
[
1
⁄
2
x C
n
x (V
peak
to
peak
)
2
x f ] x (2 x 10
-4
)
P
t
(Thermal losses) = R
s
x (I
rms
)
2
where
C
n
in Farads
V in Volts
I
rms
in Amperes
R
s
in Ohms
f in Hertz
θ
in °C
R
th
in °C/W
Due to the design of the capacitor and its technology,
the thermal impedance between the terminations and the core of
the capacitor is low, it is necessary to take care that the capaci-
tor is never overheated by use of incorrect sized connections.
In the case where the series diodes are screwed to the capaci-
tor, cooling of the diodes must be taken in account.
Do not use the capacitor as a heat sink.
Due to the complexity of the diode/capacitor thermal exchanges,
we recommend that thermal measurements shall be made on
the different components. We would be pleased to advise you on
specific problems.
PROTECTION
WORKING TEMPERATURE
(according to the power to be dissipated)
-40°C to +85°C
HOW TO ORDER
FPX
Series
FPX = Standard
FPY = RoHS
Compliant
6
Case Size
Case Size 6
Case Size 8
(See Case
Style)
6
Dielectric
6 = Polypropylene
N
Voltage
Code
N = 2000V
P = 2500V
X = 3500V
Z = 4500V
Y = 4600V
0105
Capacitance
Code
0 + pF code
0105 = 1.0μF
0335 = 3.5μF
0504 = 0.5μF
etc.
J
Capacitance
Tolerances
J = ±5%
––
Terminal Code
– – = Standard
Not RoHS Compliant
Please select correct termination style.
82
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JUNE 2015
Medium Power Film Capacitors
FPX (FPY RoHS Compliant)
ELECTRICAL CHARACTERISTICS
0.5μF to 6μF
±5%
1000 to 3000 V
1600 to 4000 V
2000 to 4600 V
5 to 20 nH
I
rms
max. = up to 160 A
The currents shown in the tables are maximum.
It is necessary to respect the thermal limits of the dielectric 85°C
see “Hot spot temperature calculation”
Insulation resistance
R
i
x C ≥ 30,000 s
Impulse current
I
2
.t maxi. = up to 729 A
2
.s
Spikes or peak currents in the capacitors may cause a deterioration of the
bonding between the metallization and the connections. These bonds are
capable of withstanding only a limited amount of energy for each spike. The
table shows the maximum energy permitted in the form (I
2
.t), where I is in
Ampere, and t is in seconds.
2
.t) replaces dV/dt which is less easy to use as it is not an expression of energy (I = C.dV/dt).
Note:
The formula (I
This type of capacitor has been designed to withstand high (I
2
.t) values.
ΔC
≤ ±2% between -40 and 85°C
Variation of capacitance with temperature
C
Climatic category
Test voltage between terminals @ 25°C
Test voltage between terminals
and case @ 25°C (Type test)
Dielectric
40/085/56 (IEC 60068)
V
s
for 10s
@ 7 kVrms @ 50 Hz for 1 min.
Polypropylene
Capacitance range C
n
Tolerance on C
n
Rated DC voltage V
n
dc
Peak voltage V
peak
Allowable overvoltage V
s
(for 10 s/day)
Stray inductance
RMS current
JUNE 2015
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83
PROTECTION
Power technology
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