```Application Guide Radial-Leaded Dipped Mica Capacitors
Capacitance is within tolerance when measured at these
frequencies:
1–1000 pF @ 1MHz
> 1000 pF @ 1 kHz
Dissipation Factor limits are below. Dissipation 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 below.
DF vs. Capacitance
0.0100
IR (M )
DFFactor
(%)
Dissipation
0.1000
0.0010
Maximum DF a 1 kHz
for capacitance values
greater than 1,000 pF
Maxiumm DF at 1 MHz
for capacitance values
of 1,000 pF or less
0.0001
1
10
100
1,000
10,000
100,000
Capacitance(pF)
(pF)
Capacitance
Capacitance
Dissipation Factor
Figure 1. DF vs. Capacitance
75–1,000 pF
1,100–3,300 pF
3,600–9,100 pF
10,000 pF
Pulse Handling: Standard dipped capacitors will withstand an
unlimited number of pulses with a dV/dt of 100,000 V/µs tested per
IEC 384-1. Smaller capacitance ratings can withstand even faster
dV/dt—ratings have been tested one million discharges at rated
100,000
ºC
voltage+25
into
a 4.7 Ω resistor with no change in capacitance. For a
+85
ºC
100 pF, 500 Vdc unit, that’s a peak dV/ dt in excess of 1,000,000 V/
10,000
ºC is expressed by this relationship:
µs.
The +125
dV/dt
+150 ºC
dV/dt = V / (RdC)
1,000
V = rated voltage, Vdc
62,000
100
Rd =
minimum
discharge
resistor,
Ω 10,000 100,000
1
10
100
1,000
C = rated capacitance, µF
This is the initial rateCapacitance
of discharge(pF)
into Rd.
0.00075 max at 1 MHz
0.0014 max at 1 kHz
0.0013 max at 1 kHz
0.0012 max at 1 kHz
Marking is in accordance with EIA RS153B and includes “CDM”
as our manufacturer’s symbol, nominal capacitance in pF,
capacitance tolerance, and dc working voltage followed by V, if
other than 500 Vdc.
Quality Factor (Q) is the reciprocal of dissipation factor.
Moisture Resistance
Insulation Resistance for capacitances up to 10,000 pF is greater
than 100 GΩ at 25 ºC and greater than 10 GΩ at 125 ºC. For other
capacitance values and temperatures, see below.
Capacitors will meet the requirements of MIL-STD-202, Method
106F as outlined here and diagrammed below. Refer to MILSTD-202 for details.
IR (M )
Insulation Resistance
(MΩ)
100,000
Voltage Coefficient: The change in capacitance from 0 volts to
rated voltage is less than 0.1%.
Figure 2. IR vs. Capacitance
IR vs. Capacitance
Hz
ues
pF
Surge Voltage: Standard dipped capacitors will withstand 500
Vdc max peak transients above rated voltage. For example, in
flyback regulators with less than 500 Vdc bias, you may use 500
Vdc-rated capacitors provided that the switching transient peaks
are less than 1,000 V.
100,000
1. Dry capacitors for 24 hours in a 50 ±2 ºC oven and then allow
to stabilize at room temperature.
+25 ºC
+85 ºC
10,000
2. Subject the capacitors to 10 24 - hour continuous cycles with
relative humidity and temperature as shown.
+125 ºC
+150 ºC
1,000
62,000
100
1
10
100
1,000
10,000
100,000
Capacitance(pF)
(pF)
Capacitance
Withstanding
Voltage
times
the rated voltage, and can be
Figure
2. is
IR2 vs.
Capacitance
applied up to 5 seconds without damage.
3. 24 hours after completion of the last cycle, the capacitors will
show no visual damage and will meet the after-test limits on the
next page.
24-Hour Moisture Resistance Cycle
65 ±2 ºC
90-98%RH
8
1-4
Temperature Coefficient and Capacitance Drift: Measure the
capacitors’ capacitance at 25 ºC, –55 ºC, 25 ºC, 125 ºC (or 150 ºC)
and at 25 ºC after stabilizing at each temperature. The capacitance
will meet the limits of the Characteristic table shown in Ordering
Information.
Solderability: After an eight hour steam aging, coat leads with
rosin flux (R) and immerse in molten 245 ºC ±5 ºC 60/40 tin/lead
solder. Solder coverage will be no less than 95% when examined
at 10X magnification.
3
25 ±2 ºC
90-98% RH
2½
3
2½
hours
2½
3
2½
–10 ±2 ºC
Uncontrolled
Humidity
CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830
1
Life Test: Subject the capacitors to maximum operating tempera- For tape and reel or ammo-packed packaging, specify on the
ture (+125 ºC or +150 ºC) with 1.5 times rated voltage applied for order.
2,000 hours. There will be no visual damage and the capacitors
See the table below for available reel-packed types, lead
will meet the after-test limits below.
pieces per ammo packs.
After-Test Limits
Test
Withstand
Voltage
Insulation
Capacitance Change
DF
Q
Resistance (whichever is greater)
Moisture
Resistance
IL
30 GΩ
NV ±1% or ±1 pF
150%
IL 2/3xIL
Life Test
IL
IL
NV ±1% or ±1 pF
150%
IL 2/3xIL
IL = Initial Limit
NV = Nominal Value
Dipped Mica Capacitors for Auto Insertion
Packaging will be in accordance with EIA-468. Dimension “h” will
be 16 mm for formed leads or 18 mm for straight leads. 20 mm
is available on special request. Specify reel or ammo on your
purchase order.
Range of Range of
Type
Lead Capacitance Pieces per Pieces per
Number Spacing Material
Range
Reel
Ammo Pack
D10
CD10
0.141
CCS
1 - 249 pF
251– 470 pF
471–1200 pF
1000 - 2500
1000–2000
1000–1500
1000 2000
1000–1500
1000
CD15
0.234
CCS
1– 330 pF
331– 470 pF
471–1500 pF
1000–2500
1000–2000
1000–1500
1000–2000
1000–1500
1000
1000–2000
1000–1500
1000
600
600
T max.
L max.
H max.
.078
.250 ±.051
.354 + .030
.709 + .039 – .020
– .020
.202 ±.028
.035 max.
h ± .020
S ± .031
.157 ± .012
CD16
CDV16
0.234
CCS
1– 330 pF
1000–2500
331– 470 pF 1000–2000
471–1500 pF 1000–1500
1501–2000 pF
800
> 2000 pF
500
CD19
0.344
CCS
10-1000 pF
1001-1500 pF
1501–3000 pF
3001-5000 pF
.500 ± .012
1000
800
600
400
800
800
600
400
Notice and Disclaimer: All product drawings, descriptions, specifications, statements, information and data
(collectively, the “Information”) in this datasheet or other publication are subject to change. The customer
is responsible for checking, confirming and verifying the extent to which the Information contained in this
datasheet or other publication is applicable to an order at the time the order is placed. All Information given
herein is believed to be accurate and reliable, but it is presented without any guarantee, warranty, representation
or responsibility of any kind, expressed or implied. Statements of suitability for certain applications are based
on the knowledge that the Cornell Dubilier company providing such statements (“Cornell Dubilier”) has
of operating conditions that such Cornell Dubilier company regards as typical for such applications, but
are not intended to constitute any guarantee, warranty or representation regarding any such matter – and
Cornell Dubilier specifically and expressly disclaims any guarantee, warranty or representation concerning
the suitability for a specific customer application, use, storage, transportation, or operating environment.
The Information is intended for use only by customers who have the requisite experience and capability to
determine the correct products for their application. Any technical advice inferred from this Information or
otherwise provided by Cornell Dubilier with reference to the use of any Cornell Dubilier products is given
gratis (unless otherwise specified by Cornell Dubilier), and Cornell Dubilier assumes no obligation or liability
for the advice given or results obtained. Although Cornell Dubilier strives to apply the most stringent quality
and safety standards regarding the design and manufacturing of its products, in light of the current state
of the art, isolated component failures may still occur. Accordingly, customer applications which require a
high degree of reliability or safety should employ suitable designs or other safeguards (such as installation
of protective circuitry or redundancies or other appropriate protective measures) in order to ensure that the
failure of an electrical component does not result in a risk of personal injury or property damage. Although
all product-related warnings, cautions and notes must be observed, the customer should not assume that all
safety measures are indicated in such warnings, cautions and notes, or that other safety measures may not be
required.
2
CDE Cornell Dubilier • 1605 E. Rodney French Blvd. • New Bedford, MA 02744 • Phone: (508)996-8561 • Fax: (508)996-3830
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