Type CMR
High-Reliability, Mica Capacitors
Specifications
Capacitance
is within tolerance
when measured at these frequencies:
1–1000 pF @ 1 MHz
> 1000 pF @ 1 kHz
capacitors’ capacitance at 25
°C,
–55
°C,
25
°C,
125
°C
(or 150
°C)
and at 25
°C
af-
ter stabilizing at each temperature. The
capacitance will meet the limits of the
Characteristic table shown in Ordering
Information.
every 2,000 hours. There will be no
visual damage and the capacitors will
meet the after-test limits on the following page.
low. Measure dissipation factor at 1
MHz when the capacitance is 1 pF to
1,000 pF, and at 1 kHz when the ca-
pacitance is greater than 1,000 pF. Dis-
sipation factor is equal to DF = 2πfRC,
where f is the test frequency, R is the
equivalent series resistance, and C is
the capacitance. For other capacitance
values, see Figure 1.
Dissipation Factor
limits are be-
Failure Rate:
Type CMR capacitors
have specified failure rate levels rang-
ing from 0.01% to 1.0% per 1,000
hours. The failure rate level is estab-
lished at a 90% confidence level and is
referred to operational life at full-rated
voltage at maximum-rated tempera-
ture.
High-Voltage Stabilization:
We
subject capacitors with Failure Levels
M, P, and R to a burn-in at twice-rated
voltage, at rated temperature, for a
minimum of 48 hours. Capacitors that
show damage, arcing, breakdown, or
low IR are removed. We reject the lot if
more than 8% of the capacitors fail.
steam aging, coat leads with a rosin
flux (R) and immerse in molten
245
°C ±5 °C
60/40 tin/lead solder. Solder
coverage will be no less than 95%
when examined at 10X magnification.
Capacitance
100–1000 pF
1100–3300 pF
3600–9100 pF
10,000 pF
Dissipation Factor
0.00075 max at 1 MHz
0.0014 max at 1 kHz
0.0013 max at 1 kHz
0.0012 max at 1 kHz
Resistance to Solvents:
Subject
the capacitors to three cycles of 3-
minute immersion in solvent, 10 strokes
with bristle brush and, where appli-
cable,
1
/
2
minute in vapor, per MIL-STD-
202, Method 215. Repeat the three
cycles for three solvent mixtures: Iso-
propyl alcohol mixture (Solvent 1),
azeotrope mixture (Solvent 3), and
water/propylene-glycol mixture (Sol-
vent 4). The marking will not rub off or
smear and there will be no visible dam-
age to the capacitor body. Refer to MIL-
STD-202 for details.
Resistance to Soldering Heat:
Capacitors will meet the requirements
of MIL-STD-202, Method 210 Test Con-
dition G. Immerse capacitor leads to
within .250 inches (6.4 mm) of the body
in molten tin/lead solder (260
°C±5 °C)
for 10±2 seconds. Allow to cool. Capaci-
tors will meet the after-test limits on
the following page.
ciprocal of dissipation factor.
Quality Factor (Q)
is the re-
Insulation Resistance
for ca-
pacitances up to 10,000 pF is greater
than 100 G. at 25
°C,
greater than 10
G. at 125
°C,
and greater than 5 G. at
150
°C.
For other capacitance values
and temperatures, see Figure 2.
Withstanding Voltage
is two
times the rated voltage, and can be ap-
plied up to 5 seconds without damage.
Solderability:
After an 8-hour
Marking
of capacitors conforms to
Temperature Coefficient and
Capacitance Drift:
Measure the
maximum operating temperature
(+125
°C
or +150
°C)
with 1.5 times rated
voltage applied for 10,000 hours. Take
readings and make visual observations
Life Test:
Subject the capacitors to
method I of MIL-STD-1285, and in-
cludes the type designation, “JAN,”
brand, trademark, source code, date
code, rated voltage, capacitance, ca-
pacitance tolerance, and highest rated
temperature. Small capacitors are
marked with the letter “J.”
.10
INSULATION RESISTANCE (MEGOHMS)
100,000
+25°C
DISSIPATION FACTOR
+85°C
+125°C
.01
10,000
+150°C
.001
Maximum dissipation factor
at 1 MHz for capacitance
values of 1,000 pF or less
.0001
Maximum dissipation factor
at 1 kHz for capacitance
values greater than 1,000 pF
1,000
1
10
100
1,000
10,000
100,000
100
5 10
100
1,000
10,000
62,000
CAPACITANCE (pF)
CAPACITANCE (pF)
Figure 1. DF vs. Capacitance
Figure 2. IR vs. Capacitance
Cornell Dubilier
•
1605 E. Rodney French Blvd.
•
New Bedford, MA 02744
•
Ph: (508)996-8564
•
Fax: (508)996-3830
•
www.cde.com
Type CMR ,
High-Reliability, Mica Capacitors
will meet the requirements of
MIL-STD-202, Method 106F as outlined
here and diagrammed on the
right. Apply 100 V or the rated voltage
(whichever is less) to half of the
capacitors. Don’t apply voltage to
the other half. Refer to MIL-STD-
202 for details.
1. Dry capacitors for 24 hours in a
50±2 °C oven and then allow to
stabilize at room temperature.
2. Subject the capacitors to 20 24-
hour continuous cycles with
relative humidity and temperature
as shown.
3. 4 to 24 hours after completion of
the last cycle the capacitors will
show no visual damage and will
meet the after-test limits below.
Moisture Resistance:
Capacitors
65 ±2 ºC
90-98 RH
1-4
8
3
25 ±2 ºC
90-98 RH
2½
3
2½
hours
2½
3
2½
–10 ±2 ºC
Uncontrolled
Humidity
After-Test Limits
Test
Moisture Resistance
Life Test
Solder Heat
IL=Initial Limit
Withstand
Voltage
IL
IL
IL
Insulation
Resistance
30 GΩ
IL
IL
Capacitance Change
(whichever is greater)
NV±1% or ±1 pF
NV±1% or ±1 pF
IV±5% or ±5pF
DF
Q
150% IL 2/3xIL
150% IL 2/3xIL
IL
IL
NV=Nominal Value IV=Initial Value
Ordering Information
Order by complete part number, as below.
For other options, write your requirements on your quote request.
Part Numbering System
CMR05
CDE
Type
C
100
J
P
Temperature Range
O = –55 °C to +125 °C
P = –55 °C to +150 °C*
D
Voltage
Y = 50 Vdc
A = 100 Vdc
C = 300 Vdc
D = 500 Vdc
R
Failure Rate
M = 1.0%/1000 hrs.
P = .1%/1000 hrs.
R = .01%/1000 hrs.
Capacitance Capacitance
1R0 = 1.0pF
Tolerance
361 = 360pF
D = ±.5 pf
122 = 1200pF
F = ±1%
G = ±2%
Characteristic
J = ±5%
Temp. Coeff.
Capacitance
Drift
ppm/
°
C
–200 to +200
±(0.5%
+0.1pF)
–20 to +100
±(0.1%
+0.1pF)
–200
to + 70
±(0.05%
+0.1pF)
Standard
Cap. Range
1 – 18 pF
20 – 82 pF
91 pF and up
C
E
F
*P temperature range available for CMR04, CMR05, CMR06, CMR07, CMR08
Cornell Dubilier
•
1605 E. Rodney French Blvd.
•
New Bedford, MA 02744
•
Ph: (508)996-8561
•
Fax: (508)996-3830
•
www.cde.com
Analog electronics
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