
Document Number: 23098
Revision 14-May-02
www.vishay.com
30
15DK, 20DK, 30DK, 40DK, 10KT, 15KT, 20KT, 30KT, 40KT Series
Vishay Cera-Mite
Heavy Duty High Voltage Capacitors
ceramite.support@vishay.com
   L        LENGTH
SIZE         MAX.
CODE   in.  mm      
J       .780   19.8
   K       .900   22.9
   L       1.00   25.4
   M      1.18   30.0
   N      1.36   34.5
    D      DIAMETER 
 SIZE         MAX.
CODE    in.     mm
    A      .880    22.4      
    B      1.05    26.7      
    C     1.30    33.0      
    D     1.55    39.4      
    E      1.80    45.7      
    F      2.13    54.1      
    G     2.30    58.4      
    H     2.42    61.5
TYPE KT CAPACITOR
Class I N4700 Temp. Coefficient
Cap Tol.  ±20% 
DF: 0.2% Max @ 1 kHz 
10,000 VDC; 4,000 VRMS, 60HZ
TERMINAL ADAPTORS
#8-32NC-2B Adapters.
Order separately as required. 
75-134A
Typical Applications
75-135A
75-136A
   CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
1500  15DKD15      B          K
 2000  15DKD20      C          K
 3300  15DKD33      D          K
 4700  15DKD47      D          K
.01 uF 15DKS10      G          K 
20,000 VDC; 5,000 VRMS, 60HZ
15,000 VDC; 4,000 VRMS, 60HZ
TYPE DK CAPACITOR 
Class III Y5U Temp. Coefficient
Cap Tol. +80% - 20% 
DF: 2% Max @ 1 kHz
CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
500   20DKT50      A          L
 1000  20DKD10      C          L
 1300  20DKD13      C          L
 2500  20DKD25      D          L
 3300  20DKD33      E          L
 4700  20DKD47      F          L
 6800  20DKD68      H          L 
30,000 VDC; 7,000 VRMS, 60HZ
CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
500   30DKT50      B          N
 1000  30DKD10      C          M
 2500  30DKD25      D          M
 3300  30DKD33      F          M
 4700  30DKD47      G          M
40,000 VDC; 9,000 VRMS, 60HZ
   CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
300   40DKT30      A          N
  500   40DKT50      B          N
  780   40DKT78      C          N
 1000  40DKD10      D          N
 1600  40DKD16      E          N
 2500  40DKD25      F          N
 3300  40DKD33      G          N
CAP    CATALOG         SIZE 
    PF       NUMBER   D CODE  L CODE
 1000     10KTD10       C            J
 2200     10KTD22       D            J
 3900     10KTD39       F            J
15,000 VDC; 6,000 VRMS, 60HZ
CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
820   15KTT82      C          K
 1900  15KTD19      F          K
 3300  15KTD33      G          K
20,000 VDC; 8,000 VRMS, 60HZ 
   CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
560   20KTT56      C          L
 1000  20KTD10      D          L
 1900  20KTD19      F          L
 2700  20KTD27      H          L 
30,000 VDC; 10,000 VRMS, 60HZ
   CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
400   30KTT40      C          M
  660   30KTT66      D          M
 1200  30KTD12      F          M
 1800  30KTD18      H          M
CAP     CATALOG              SIZE 
    pF        NUMBER   D CODE  L CODE
300   40KTT30      C          N
  640   40KTT64      E          N
 1000  40KTD10      F          N
 1300  40KTD13      H          N 
40,000 VDC; 13,000 VRMS, 60HZ
715C Series
10 TO 40KV MOLDED EPOXY CASE
DK GENERAL PURPOSE TYPE, EIA CLASS III
APPLICATIONS:
 High Voltage Power Supplies, CRTs, Lasers. 
 Smallest Size Available.
KT SPECIAL PURPOSE TYPE, EIA CLASS I 
APPLICATIONS:
 High Voltage Power Supplies, CRTs, Lasers.
 Greater Capacitance Stability.
 Features Low DF and Low Heating, Low DC & AC Voltage 
 Coefficient.
 Tighter Tolerance On Capacitance.
 Highest AC Voltage Ratings.
PERFORMANCE CHARACTERISTICS:
Operating Temperature Range:
 -30
°
C to +85
°
C
Storage Temperature Range:
 -40
°
C to +100
°
C
Dielectric Strength:
 150% of rated voltage, charging 
current limited to 50mA.
Insulation Resistance:
 200,000 megohms or 1000
F 
minimum at 25
°
C.
Corona Limit:
 50 picocoulombs at rated AC voltage.
Self Resonant Frequency:
 Ranges from 50 MHz for small 
diameters to 10 MHz for large diameters.
Power Dissipation:
 Limit to 25
°
C rise above ambient, 
measured on case.
KT Series ceramic material is 
specially designed to handle 
AC current, due to low 
dissipation factor.
-30
30
20
10
0
-10
-20
-30
-40
25
85
Temp. (
°
C)
%
KT
Series
DK
Series
H
O
CRT
H.V.
Focus
High Voltage
Ceramic Capacitor
Applications where high dv/dt is present will operate at high 
peak currents (I
p
 = dv/dt x C). Capacitors should be evaluated in 
the actual circuit for dv/dt greater than 2000V/ microsecond. If 
repetitive, it may be necessary to use a series resistor or other 
impedance to limit peak currents to safe values.
NOTE: Screw torque limit: 
12 inch pounds. Use 
#8-32, 3/16" long screw to 
prevent bottoming.
L
D
#8-32NC-2B
Fig 17
DIA
0.015
±
0.187 FLAT
NO. 6THD
0.250
0.015
±
0.187 FLAT
NO. 8THD
0.375
DIA
NOINT THD
0.312
0.015
±
DIA
0.187 FLAT
All tolerances ±0.010 unless speci
fi
  ed.