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High-Voltage Types, Specifications, Mica Capacitors
140 Technology Place
Liberty, SC 29657
(864) 843-2277, Fax (864) 843-3800
http://www.cornell-dubilier.com
E-mail: cde@cornell-dubilier.com
4.030
C O R N E L L
D U B I L I E R
Your Source For Capacitor Solutions
High-V
oltage
& Pulse
Mica Capacitors
High-Voltage Types, Specifications, Mica Capacitors
Type 271
Type 273
Type 272
Type 292
Type 291
Type 293
Type 294
MOUNTING STYLE 0
MOUNTING STYLE 1
MOUNTING STYLE 2
TOLERANCES UNLESS
OTHERWISE SPECIFIED:
±
.031
MOUNTING STYLE 0
MOUNTING STYLE 1
MOUNTING STYLE 2
MOUNTING STYLE 0
MOUNTING STYLE 1
MOUNTING STYLE 2
MOUNTING STYLE 0
MOUNTING STYLE 1
MOUNTING STYLE 2
MOUNTING STYLE 0
MOUNTING STYLE 1
MOUNTING STYLE 2
MOUNTING STYLE 0
MOUNTING STYLE 1
MOUNTING STYLE 2
Cast-Case Styles 140 Technology Place
Liberty, SC 29657
(864) 843-2277, Fax (864) 843-3800
http://www.cornell-dubilier.com
E-mail: cde@cornell-dubilier.com
4.031
C O R N E L L
D U B I L I E R
Your Source For Capacitor Solutions
High-V
oltage
& Pulse
Mica Capacitors
Type 271 (CM 66)
Type 272 (CM 71)
Type 273
Type 291 (CM 76)
Type 292 (CM 81)
Type 293 (CM 86)
Type 294 (CM 91)
Type G5 (CM 95)
High-Voltage Types, Specifications, Mica Capacitors 140 Technology Place
Liberty, SC 29657
(864) 843-2277, Fax (864) 843-3800
http://www.cornell-dubilier.com
E-mail: cde@cornell-dubilier.com
4.032
C O R N E L L
D U B I L I E R
Your Source For Capacitor Solutions
High-V
oltage
& Pulse
Mica Capacitors
High-Voltage Types, Specificaations, Mica Capacitors
Type G1

(available in same ratings as 291)
Type G2

(available in same ratings as 292)
Type G3

(available in same ratings as 293)
Type G4

(available in same ratings as 294)
Type G5

(ratings from 50 pF, 35,000 V
pk
to 10,000 pF,
15,000 V
pk
)
Type
L
H
T
t
h
W
d(min.)
D
S
Thread
F1
2.813
1.969
.938
.25
1.469
2.031
.150
2.375
1.5
8-32 NC-2A
F2
3.109
2.25
1.25
.375
1.75
2.281
.187
2.625
1.625
10-32 NF-2A
F3
4.031
3.938
2.438
.375
2.938
3.063
.266
3.562
1.438
1
/
4
-28 NF-2A
G1
3.813
2.5
2.813
.25
.266
3.25
G2
5
3
3.5
.25
.266
4.25
G3
6.5
4
5
.375
.375
5.75
G4
6.5
5.75
5
.375
.375
5.75
G5
9
10
6.75
.5
.406
Potted-Case Styles
Type F1

(available in same ratings as 271)
Type F2

(available in same ratings as 272)
Type F3

(available in same ratings as 273)
d 2 HOLES
T
±

1 64
W
±

1 32
D
±
.005
L
±

1 32
S
±

1 64
THREAD
t
±

1 32
h
±

1 32
H
±

1 16
KC
AMPS
VOLTS
MFD
DIA 3 HOLES
17 64
±
1 64
4
1 32

±

1 32
1.625
±
.005
3.562
±
.005
2
7 16

±

1 64
5 16

±

1 32
3
1 16

±

1 32
1
7 16

±

1 64
5 16

±

1 32
3
15 16
MAX
2
15 16

±

1 32
3 8

±

1 32
1 4
-28 NF-2A THREAD
D
±

1 64
T
±

1 16
L
±

1 16
H
±

1 16
t
±

1 32
d
DIA
13 32
±
1 64
DIA
NAMEPLATE
4
±

1 64
R
1
±

1 64
3
3 8

±

1 16
R
1 2
±
1 32
10
±

1 16
+
1 64
.00 140 Technology Place
Liberty, SC 29657
(864) 843-2277, Fax (864) 843-3800
http://www.cornell-dubilier.com
E-mail: cde@cornell-dubilier.com
4.033
C O R N E L L
D U B I L I E R
Your Source For Capacitor Solutions
High-V
oltage
& Pulse
Mica Capacitors
High-Voltage Types, Specifications, Mica Capacitors
Specications
Capacitance
is within tolerance
when measured at these frequen-
cies:
11000 pF @ 1 MHz
> 1000 pF @ 1 kHz
Dissipation Factor
is typically
less than 0.05% when measured as
above. Dissipation factor (DF)
equals 2 fRC, where f is the test fre-
quency, R is the equivalent series
resistance ( ), and C is nominal ca-
pacitance (F). Q is the reciprocal of
the dissipation factor.
Operating Temperature
Range
is 55
°
C to +125
°
C.
Insulation Resistance
is no
less than 7500 M when measured
at 100 Vdc.
Temperature Coefficient
and Capacitance Drift:
Mea-
sure the capacitors capacitance at
25
°
C, 55
°
C, 25
°
C, 125
°
C, and at
25
°
C after stabilizing at each tem-
perature. The capacitance will meet
the limits of the Characteristic table
shown in Ordering Information.
Rated Peak Voltage
is not to
be exceeded in actual use. Voltage
ratings are in the listings and apply
under the following conditions:
Temperature: Within the speci-
fied operating temperature
range.
Altitude: Up to 50,000 feet or 3.4
inches of mercury.
Relative Humidity: Up to 80%.
Frequency: As specified.
Where pulse conditions are encoun-
tered, contact us.
Withstanding Voltage:
Ca-
pacitors will withstand application
of an ac potential between termi-
nals having an rms value equal to
the rated peak voltage at a fre-
quency of 100 Hz or less without
damage, arcing or breakdown. Ap-
ply the potential by raising the volt-
age from zero to the specified value.
Apply the full potential for a mini-
mum of 5 seconds.
Case Insulation:
Capacitor
cases will withstand, without dam-
age, arcing or breakdown, a 60-Hz
peak ac potential equal to twice the
rated peak voltage applied between
the terminals connected together
and a metal electrode touching the
case. Apply this potential for be-
tween 1 and 5 seconds.
Current Ratings
at various fre-
quencies are in the listings and ap-
ply under the following conditions:
Temperature: 65
°
C maximum
Derating Factor: None
Vibration:
Capacitors will with-
stand vibrational forces occurring
at rates of from 10 to 55 Hz for 4
1 2
hours. The total excursion during
vibration is 0.06 inches. At the end
of this period, make the following
inspections and tests:
Visual and Mechanical Inspec-
tion: No perceptible deterioration.
Withstanding Voltage: As speci-
fied under Withstanding Voltage.
Insulation Resistance: No less
than 7500 M .
Capacitance Change: Not to ex-
ceed 3% of the nominal value or
one picofarad, whichever is greater.
Temperature and Immer-
sion Cycling:
Capacitors will
withstand the temperature and im-
mersion cycles indicated in the
tables below. Follow three tempera-
ture cycles by two immersion cycles.
Make the measurements listed be-
low no more than 30 minutes fol-
lowing the final immersion cycle:
Withstanding Voltage: As speci-
fied under Withstanding Voltage.
Insulation Resistance: No less
than 7500 M .
Capacitance: Change not to ex-
ceed 4% of the nominal value or
one picofarad, whichever is greater.
Temperature Cycling Test
Conditions
Steps
Temp.
Interval
(
°
C)
(Minutes)
1
55 + 0
30
3
2
25 +10
10 to 15
5
3
125 + 3
30
0
4
25 +10
10 to 15
5
Immersion Test Conditions
Number of cycles: 2
Duration of each immersion: 15
minutes
Immersion bath: Saturated solu-
tion of sodium chloride and wa-
ter
Temp. of hot bath: 65
Temp. of cold bath: 25
Life Test:
Subject all capacitors to
a temperature of 55
°
C for 48 hours.
Then subject units cast in rectan-
gular cases (Types 271, 272, and
273) to a 60-Hz rms voltage equal
to the rated peak voltage for 250
hours. Subject units cast in cylindri-
cal cases (Types 291, 292, 293, and
294) to a 60-Hz rms voltage equal
to 90% of the rated peak voltage for
250 hours. In both tests, maintain
the temperature at 125
°
C. After test,
the capacitors will meet these re-
quirements:
Withstanding Voltage: As speci-
fied under Withstanding Voltage.
Insulation Resistance: No less
than 7500 M .
Capacitance Change: Within the
limits given in the table below or
one picofarad, whichever is greater.
Characteristic
Maximum Cap.
Change
B
±
8%
C
±
3%
D
±
3%
E
±
3%
In addition, the capacitor must
show no visual damage and the
markings must be legible.
+5
0
+10
5