Medium Power Film Capacitors
FPG (FPH RoHS Compliant)
PROTECTION
Metallized polypropylene dielectric capacitor with controlled
self-healing.
Reinforced metallization on margins developed for high
impulse currents.
Axial connections specially developed to reduce series
inductance and to provide rigid mechanical mounting.
APPLICATIONS
Protection of gate turn-off thyristor (G.T.O.).
Medium frequency tuning.
HOT SPOT TEMPERATURE CALCULATION
See Hot Spot Temperature page 3.
θ
hot spot
=
θ
terminals
+ (P
d
+ P
t
) x R
th
DIMENSIONS
Max Torque: 8.5Nm (M8)
4.5Nm (M6)
h
±2
(0.079)
H 62
M6/6 or M8/8
Ø4 (0.16) A
with
millimeters (inches)
Plastic Case
TPC
H
±0.5
(0.020)
A
Tinned Output
Resin
h
±2
(0.079)
Ød
ØDmax
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)
PACKAGING MATERIAL
Cylindrical in plastic case filled with thermosetting resin.
Outputs: threaded inserts either M6 or M8.
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 capacitor is never overheated by use of incorrect sized
connections.
In the case where the series diodes are screwed to the
capacitor, 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
HOW TO ORDER
FPG
Series
FPG = Standard
FPH = RoHS Compliant
(according to the power to be dissipated)
-40°C to +85°C
Not RoHS Compliant
8
Case Size
Case Size 8
6
Dielectric
6 = Polypropylene
R
Voltage
Code
R = 1500V
N = 2000V
P = 2500V
W = 2600V
X = 3500V
Z = 4500V
Y = 4600V
0105
Capacitance
Code
0 + pF code
0105 = 1.0μF
0405 = 4.0μF
0604 = 0.6μF
etc.
J
Capacitance
Tolerances
J = ±5%
––
Terminal Code
– – = Standard
Please select correct termination style.
86
■
JUNE 2015
Medium Power Film Capacitors
FPG (FPH RoHS Compliant)
ELECTRICAL CHARACTERISTICS
0.12μF to 6μF
±5%
800 to 3000 V
1200 to 4000 V
1500 to 4600 V
500 to 1400 V
≈
10 nH
I
rms
max. = up to 80 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 max. given in the tables
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.
Note:
The formula (I
2
.t) replaces dV/dt which is less easy to use as it is not an expression of energy (I = C.dV/dt).
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
during 10s
@ 4 kVrms @ 50 Hz during 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)
Nominal RMS voltage V
n
dc
Stray inductance
RMS current
PROTECTION
APPLICATION NOTES
G.T.O. PROTECTION
Choice of voltage: V
1
≤ V
peak
V
2
≤ V
n
dc
Maximum overvoltage ≤ V
s
(10 s/day)
Nominal DC voltage (V
n
dc) and peak voltage (V
peak
) are given
in the table of values.
JUNE 2015
■
87
PROTECTION
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