102
K78-37
__________________________________________________________________________
HIGH-FREQUENCY POLYPROPYLENE FILM CAPACITORS
:
.673635.004
,
,
.
:
,
.
Specifications:
.673635.004
Designed to operate in DC, AC and
ripple current circuits and in pulse
mode.
Design: wrapped with adhesive tape;
capacitor ends sealed with epoxy
compound.
25
+5
L max
D max
d
0,001 .... 10
Rated capacitance
0,001 .... 10 F
(
-60
o
C ... +85
o
C)
250; 400; 630
Rated voltage
(temperature range
-60
o
C ... +85
o
C)
250; 400; 630 V
< 0,1
0,1
<
< 0,47
> 0,47
10; 20 %
5; 10; 20 %
2; 5; 10; 20 %
Capacitance
tolerance
at r < 0,1F
at 0,1 F < r < 0,47F
at r > 0,47F
10; 20 %
5; 10; 20 %
2; 5; 10; 20 %
f = 1
0,0015
Dissipation factor at f = 1 kHz
0,0015
0,33
50 000 MO
Insulation
resistance
at r 0,33F
50 000 MOhm
> 0,33
15 000 MO
Time
constant
at r > 0,33F
15 000 MOhmF
-60 ...+100
o
C
Operating temperature range
-60 ...+100
o
C
(-500 ... 0) 10
-6
-
1
TC
-500 ... 0 ppm/
o
C
15 000
Operating time
15 000 hours
15
Shelf
life
15
years
(933%
.
402
o
C,
21
)
Climatic categories
RH 933%,
402
o
C, 21 days
:
78-37 - 400 - 0,33
+
5%
Ordering example:
Capacitor K78-37 - 400 V - 0,33 F
+
5%
104
U
f
f.
Permissible amplitude of AC sinusoidal voltage or amplitude of AC sinusoidal component of ripple voltage
U
f
as a function of frequency f
2,2 4,7
10
10
-3
-2
-2
10
2
5
10
-1
10
0
10
1
2,2 4,7
2,2 4,7
2,2 4,7
-1
10
0
10
1
10
2
10
2
5
2
5
2
5
2
10
1
5
2
10
2
5
2
10
3
5
2
10
4
5
2
10
5
5
10
6
630
400
250
U
,
U
= 630
U
= 400
U
= 250
f
U
f
U
%
U
f
:
:
f = 10
4
, C
= 10
,
U
= 250 B (t 85
o
C)
:
U
f
= 20 %
U
= 50
:
f = 10
5
, C
= 0,022
,
U
= 630 B (t 85
o
C)
:
U
f
= 40 %
U
= 252
:
f = 10
6
, C
= 0,1
,
U
= 400 B (t 85
o
C)
:
U
f
= 1,8 %
U
= 7,2
Example of calculation of U
f
:
Given:
f = 10
4
Hz , C
r
= 10 F,
U
r
= 250 V (t 85
o
C)
Finding:
U
f
=20 % of U
r
= 50 V
Given:
f = 10
5
Hz , C
r
= 0,022 F,
U
r
= 630 V (t 85
o
C)
Finding:
U
f
=40 % of U
r
= 252 V
Given:
f = 10
6
Hz , C
r
= 0,1 F,
U
r
= 400 V (t 85
o
C)
Finding:
U
f
=1,8 % of U
r
= 7,2 V
105
U
F ,
,
,
Permissible peak-to-peak pulse voltage U as a function of pulse repetition frequency F , minimal
temporal sector , corresponding pulse leading edge slope
or pulse trailing edge slope
and rated
capacitance
r
2
2,2
10
-1
10
-3
4,7
2,2
10
-2
4,7
10
-1
4,7
2,2
4,7
10
0
2,2
10
1
10
1
10
6
10
2
5
2
10
3
5
2
5
10
4
5
2
2
10
5
5
10
1
2
10
0
5
5
2
2
5
10
2
U ,
400
630
250
U
U
t
F
U
U
%
u
=10 C
-5
u
=10 C
-6
U :
:
F = 5 10
5
,
= 10
-6
c,
U
= 250 B (t 85
o
C), C
= 1,0
:
U = 2,5 %
U
= 6,3 B
:
F = 2 10
4
,
= 10
-5
c,
U
= 630 B (t 85
o
C), C
= 0,22
:
U = 55 %
U
= 347 B
Example of calculation of U :
Given:
F = 5 10
5
Hz ,
= 10
-6
s,
U
r
= 250 V (t 85
o
C), C
r
= 1,0 F
Finding:
U = 2,5 % of U
r
= 6,3 V
Given:
F = 2 10
4
Hz ,
= 10
-5
s,
U
r
= 630 V (t 85
o
C), C
r
= 0,22 F
Finding:
U = 55 % of U
r
= 347 V
106
I
m
dU/dt
Maximum permissible amplitude of pulse current
I
m
and rate of the voltage change dU/dt
U
,
U
r
, V
C
,
r
, F
I
m
, max, A
dU/dt, max, V/s
0,01...0,022 6...23
1050
0,033 33 1010
0,047 45 962
0,068 60 880
0,1...0,15 41...71
470
0,22...0,33 95...142
434
0,47 95 202
0,68 145 213
1,0 203 203
1,5 301 201
2,2 312 142
3,3...4,7 414...596 127
250
6,8...10 800...1095 118
0,01...0,015 12,5...22
1400
0,022...0,033 30...47
1440
0,047 65 1385
0,068...0,15 36...106
700
0,22 149 677
0,33 124 376
0,047...0,68 170...285
400
1,0 263 263
1,5 383 256
400
2,2 509 232
0,001 1,56 1560
0,0015 2,2 1460
0,0022 3,12 1420
0,0033...0,0047 5,0...9,0
1900
0,0068...0,01 10,5...16
1620
0,015...0,022 27...40
1800
0,033 27 818
0,047 34 723
0,068...0,1 49...73
730
0,15 94 527
0,22 89 405
0,33 138 418
0,47 195 415
630
0,68...1,0 175...263
263
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