Sharma Film Capacitors
FILM
Quick Reference Guide
Series
(Former Series)
CAPACITORS
Style
Dielectric/
Construction
Metallized Polyester
Molded can
Metallized Polyester
Molded can
Metallized Polyester
Molded can
Metallized Polyester
Epoxy molded
Metallized Polyester
Epoxy dipped
Metallized Polyester
Epoxy dipped
Lead Spacing
millimeters / (inches)
5.0 (0.200”)
Capacitance Range
Voltage Range
0.001 µF to 1.0 µF
50 VDC to 400 VDC
0.033 µF to 0.33 µF
100 VDC to 630 VDC
0.001 µF to 6.8 µF
100 VDC to 1000 VDC
PLASTIC FILMS
USED IN CAPACITORS
The capacitance value of a
capacitor depends on the area
of the dielectric separating the
two conductors, its thickness
and the dielectric constant.
Other properties of the film
such as the temperature
coefficient, the dissipation
factor, the voltage handling
capabilities, its suitability to be
metallized etc. also influence
the choice of the dielectric.
POLYESTER FILM
MKT 050
(MKT1.85)
MKT 075
(MKT1.67)
MKT 100
(MKT1.60)
7.5 (0.300”)
10.0 (0.400”), 15.0 (0.600”),
22.5 (0.886”), 27.5 (1.083”)
MKT 00S
(SMX)
MKT D01
(MPD-1)
Surface Mount
0.01 µF to 0.22 µF
50 VDC to 630 VDC
0.001 µF to 6.8 µF
100 VDC to 630VDC
10.0 (0.400”), 15.0 (0.600”),
22.5 (0.886”), 27.5 (1.083”)
MKT D02
(MPD-2)
10.0 (0.400”), 15.0 (0.600”),
17.5 (0.689”), 25.0 (0.984”)
27.5 (1.083”)
0.01 µF to 3.9 µF
100 VDC to 630VDC
MKT D03
(MPD-3)
Metallized Polyester
Epoxy dipped
10.0 (0.400”), 15.0 (0.600”),
17.5 (0.689”), 25.0 (0.984”)
27.5 (1.083”)
0.01 µF to 3.9 µF
100 VDC to 630VDC
MKTR
(MPR)
MKTO
(MPO)
Metallized Polyester
Tape wrapped
Metallized Polyester
Tape wrapped
Rounded Axial
0.01 µF to 6.8 µF
63 VDC to 630 VDC
0.01 µF to 6.8 µF
63 VDC to 630 VDC
Oval Axial
This film has a relatively high
dielectric constant which
makes it suitable for designs
of a capacitor with high
volumetric efficiency. It also
has high temperature stability,
high voltage and pulse
handling capabilities and can
be produced in very low
thickness. It can also be
metallized. Polyester is a
popular dielectric for plain film
capacitors
as
well
as
metallized film capacitors.
POLYPROPYLENE FILM
The dielectric constant of polypropylene is slightly higher than that of polyester which makes the capacitors relatively bigger in size. This film has
a low dissipation factor and excellent voltage and pulse handling capabilities together with a low and negative temperature coefficient which is
an ideal characteristic for many designs. Polypropylene has the capability to be metallized.
POLYSTYRENE FILM
The dielectric constant of Polystyrene is relatively lower resulting in larger physical size of capacitors. Though the temperature handling
capability of this film is lower than that of the other films, it is extremely stable within the range. Its low dissipation factor and the negative, near
linear temperature coefficient characteristics make it the ideal dielectric for precision capacitors. Polystyrene cannot be metallized.
Cross Reference Guide
SHARMA
(former series)
Arcotronics
Evox
MEPCO*
Philips
Roederstein
Siemens
Thompson
Wima
MKT
050
MKT1.85
R.85
MMK 5
712A 1
370
MKT1817
B32529
IRD/MC
MKS 2
MKT
075
MKT1.67
R.66
MMK
719A 1
371
MKT1818
B32520/30
IRD/MC
MKS 3
MKT
100
MKT1.60
R.60
MMK
719A 1
372 & 373
MKT1822
B32521/31
IRD/MC
MKS 4
MKT
00S
SMX
LDA
-
-
-
MKT1824
-
-
SMD 7.3
MKT
D01
MPD-1
-
-
712A 1
367 to 369
-
5140 to 44
MD
-
MKT
D02
MPD-2
-
-
712A 1
366 to 369
-
5140 to 44
MD
-
MKT
D03
MPD-3
-
-
712A 1
367 to 369
-
5140 to 44
MD
-
MKTR
MPR
-
-
-
-
MKT1813
-
-
MKTO
MPO
-
-
-
-
-
-
-
-
* MEPCO SERIES ARE BEING REPLACED WITH PHILIPS SERIES AS LISTED IN THE TABLE. BOTH SERIES ARE LISTED FOR YOUR CONVENIENCE.
Sharma Film Capacitors
Ordering/Part Numbering
Example below indicates: MKT100 Series, 0.1µF, 5% Tol., 100 Volts, Bulk.
(EXAMPLE)
M
K
T
1
0
0
1
0
4
J
1
0
1
Series
Enter Series Code: (Up to 6 Digits)
MKT050, MKT075, MKT100, MKT00S, MKTD01, MKTD02,
MKTD03, MKTR, MKTO.
Capacitance
Enter EIA Capacitance Code: (3 Digits)
First Two Digits Represent Significant Figures of Capacitance in Picofarads.
Third Digit Indicates Number of Zeros
Example: 1000pF = 102
0.01uF = 103
Tolerance
Enter Capacitance Tolerance Code: (1 Digit)
Tolerance
SPCL ± 1% ± 2% ± 3%
Code
A
F
G
L
Rated Voltage
Enter Voltage Code: (3 Digits)
First Two Digits Represent Significant Figures of DC Voltage unless individual data sheet specifies Only AC Rating.
Third Digit Indicates Number of Zeros
Example: 50V DC = 500
250V DC = 251
Product Packaging Code
Standard for Film Capacitors is Bulk packing. No Packaging Code Required for Bulk Style.
For other packaging styles, Enter packaging code listed below. (1 Digit)
Packaging
Code
T
A
( no code)
Packaging
Style
Tape / Reel
Ammo
Bulk
± 5%
J
± 6%
H
± 10% ± 20%
K
M
Part Marking
BOX TYPE
The Capacitance value is marked in µF together
with the Tolerance code and the DC Voltage
Figures on the top surface of the capacitors. The
MKT 100
capacitance is also marked in Nano Farads with "n"
representing the decimal point in the capacitance
value. The SAHA logo and series codes, MKT100,
MKP 100, KP300 etc., or their former series
designations, are marked on the side. MKT100 series is supplied in
certain cases, without series code marking. SAHA logo may be
replaced with
marking,
"SH"
or “S” depending upon the
limitations of space.
2.2J250
OTHER TYPES
All other types of capacitors such as tape wrapped axial, tape wrapped radial, vertical box type etc.,. are also marked on the body of the
capacitor with the similar information in one of the combinations, as explained above. In addition, in certain cases, the outer foil side is also
indicated with a dot or ring.
DIPPED TYPE
The Capacitance value is marked in µF along
with the Tolerance code and the DC Voltage
2.2K250
Figures on the side of the capacitors. The
capacitance is also marked in Capacitance
code with the first two digits representing the
significant digits followed by one digit
representing the number of zeros. The SAHA
logo may be replaced with
marking, "SH",
“S”
or no brand marking depending on the limitation of space.
Sharma Film Capacitors
PERFORMANCE CHARACTERISTICS
ELECTRICAL - BASIC PARAMETERS
1.1 RATED CAPACITANCE
The nominal or rated value of capacitance is measured at 25 °C in an measuring bridge with 1K Hz
source, free of harmonics. Please refer to relevant series for the range of capacitance value covered.
Capacitance is frequency and temperature dependent. The variation pattern of capacitance with
temperature and frequency is explained in sections 2.1 and 2.2.
1.2 CAPACITANCE TOLERANCE
The permitted variation of actual value from the nominal value is termed the tolerance. The tolerance
is expressed in percentage. The standard tolerances for plastic film capacitors are ±5% (J), ±10% (K)
and ±20% (M).
1.3 RATED VOLTAGE
The voltage at which the capacitor can operate continuously up to a temperature of 85 °C (unless
otherwise specified) is the rated voltage. As this is a critical parameter for choosing a capacitor, the
case sizes are listed in a matrix of capacitance value and rated voltage.
1.4 CATEGORY VOLTAGE
The maximum voltage that may be applied continuously over the temperature range is termed the
category voltage. This is same as the rated voltage up to 85 °C unless otherwise specified in the
climactic category of the product. Above 85 °C a derating has to be applied depending upon the
dielectric.
1.5 OPERATING TEMPERATURE
This is the temperature range with in which the capacitor can function as specified in the climactic
category. Please refer to relevant sections for derating above the temperature at which the full rated
voltage can be applied.
1.6 DISSIPATION FACTOR
This is the measurement of tangent of loss angle (tan d) and is expressed as a percentage.
Measurement of dissipation factor is carried out at 1 K Hz. or 10 K Hz. as specified in the data sheet
of the relevant series at 25 °C. Dissipation factor is temperature and frequency dependent. The
nature of variation of dissipation factor with temperature and frequency for different dielectric are
explained in Figures 2.3A to 2.3C and 2.4A to 2.4C.
1.7 INSULATION RESISTANCE
Insulation Resistance is the electrical resistance offered by the capacitor. The Insulation Resistance
is measured directly in Mega Ohms where as for higher capacitance values it is expressed in seconds
as the product of M Ohm and µF.
1.8 PULSE RISE TIME
The pulse rise time or dv/dt rating is the capability of the capacitor to handle rapid changes in voltage
or pulse. This is expressed in terms of Volts per µseconds. The dv/ dt rating of a capacitor depends
upon the dielectric as well as the design and construction of the capacitors. The dv/dt values of
different types of capacitors are listed in the corresponding data sheets of the capacitors.
Polypropylene
Capacitance Change Vs. Temperature
Figure 2.1A
Polystyrene
Capacitance Change Vs. Temperature
Figure 2.1B
Polyester
Capacitance Change Vs. Temperature
Figure 2.1C
Figure 2.2A
ELECTRICAL - EFFECTS AND RELATIONS
2.1 TEMPERATURE DEPENDENCE OF CAPACITANCE
Capacitance of plastic film capacitors vary with temperature. However the pattern of variation is
different for different plastic film dielectrics such as Polystyrene, Polyester and Polypropylene. The
The variation patterns for these dielectrics are shown in figure 2.1A, 2.1B and 2.1C. The rate of
change of capacitance with temperature is termed the Temperature Coefficient. The nominal values
of temperature coefficient for different dielectrics are shown below.
DIELECTRICS
TEMPERATURE
COEFFICIENT
POLYSTYRENE
-150 ppm
POLYESTER
+400 ppm
POLYPROPYLENE
-200 ppm
Polystyrene
Capacitance Change Vs. Frequency
2.2 FREQUENCY DEPENDENCE OF CAPACITANCE
Capacitance reduces with increase in frequency. The
variation pattern for different dielectrics are shown in
figure 2.2A, 2.2B and 2.2C.
2.3 TEMPERATURE DEPENDENCE OF
DISSIPATION FACTOR
The dissipation factor varies with temperature. Each
dielectric follows a unique variation pattern. The variation
pattern for different dielectrics are shown in figure 2.3A,
2.3B and 2.3C.
Figure 2.2C
Figure 2.2B
Polypropylene
Capacitance Change Vs. Frequency
Polyester
Capacitance Change Vs. Frequency
Sharma Film Capacitors
Figure 2.3A
Figure 2.4A
2.4 FREQUENCY DEPENDENCE OF
DISSIPATION FACTOR
Dissipation factor increased with frequency. The variation
pattern is different for different dielectrics. The typical
variation pattern for different dielectrics are shown in fig.
2.4A, 2.4B and 2.4C.
2.5 TEMPERATURE DEPENDENCE OF INSULATION
RESISTANCE
The insulation resistance of the dielectric varies with
temperature. The variation pattern is different fro different
dielectric films. The typical variation pattern for different
dielectrics are shown in figure 2.5A, 2.5B and 2.5C.
Polystyrene
Dissipation Factor Vs. Temperature
Polystyrene
Dissipation Factor Vs. Frequency
Figure 2.3B
Figure 2.4B
ELECTRICAL - AC APPLICATIONS
When a capacitor is connected to alternating voltage its
electrodes are alternately charged positive and negative.
The charge alternates with a rhythm of double the
frequency of the alternating voltage. Thus there is
alternating current flowing in the leads of the capacitor.
3.1 ACROSS THE LINE APPLICATIONS
In this application the capacitor is connected between the
lines, ie, between the main phase and neutral line
terminals. In this type of application, failure of capacitor
due to short circuit will not result in an electric shock. The
capacitors rated for normal across the line applications
are termed class-X2 capacitors.
3.2 BETWEEN LINE AND GROUND APPLICATIONS
In this type of application the capacitors are connected
between the line and the ground, ie, between the phase
terminal and the body. In this application, failure of the
capacitor due to short circuit could possibly expose
somebody touching the appliance to an electric shock.
The capacitors rated for this application are termed class-
Y capacitors.
Polypropylene
Dissipation Factor Vs. Temperature
Polypropylene
Dissipation Factor Vs. Frequency
Polyester
Dissipation Factor Vs. Temperature
Polyester
Dissipation Factor Vs. Frequency
Figure 2.3C
Figure 2.4C
MECHANICAL CHARACTERISTICS
Figure 2.5A
Figure 2.5B
4.1 RESISTANCE TO SOLVENTS
The encapsulation technics adopted in the manufacture of
plastic film capacitors ensure resistance to a wide range
of solvents and cleaning liquids. The epoxy end sealed
boxed capacitors can stand Trichloro trifluorethane,
Methanol, Ethanol, Isopropanol and Aqueous cleaning
solvents.
4.2 SOLDERABILITY
A minimum of 3/4 of the circumferential surface of the
terminations will be covered with new solder when dipped
in molten solder bath at 230 °C for 2 ±1 sec. after
immersing
in methanol - rosin solution at room
temperature for 5 to 10 seconds.
Polystyrene
Insulation Resistance Vs. Temperature
Polyester
Insulation Resistance Vs. Temperature
Figure 2.5C
4.3 TERMINAL STRENGTH
The leads are made of tinned copper wire. The terminals are capable of withstanding an axial load of
2.25 Kgs(5 lbs).
ENVIRONMENTAL
RESISTANCE TO HUMIDITY
The capacitor samples will be exposed to 93 ±2 °C for 56 days at 40 ±2 °C. After the test the
capacitance change shall be within 3% of the original value, The insulation resistance shall be within
50% of the initial limits and the dissipation factor shall remain within the initial specifications.
Polypropylene
Insulation Resistance Vs. Temperature
Sharma Film Capacitors
MKT 050
SERIES
Formerly M
KT
1.85 series
INTRODUCTION
The MKT 050 Series Metallized Polyester Film Capacitors are miniature capacitors with 5 mm
lead spacing. This series covers a wide range of values and voltages and exhibit excellent
high frequency characteristics. In addition to specific applications such as Blocking, By-
passing and Coupling, this series is widely used in all General Purpose applications.
FEATURES
value and Voltage
•
Wide miniature size range
•
Ultra retardant case and potting
•
Flame dimensions and surface finish due to molded case construction
•
Consistentin tape & reel form for automatic insertion
•
Available capability
•
Self healing
GENERAL SPECIFICATIONS:
Dissipation factor:
For capacitance
≤
0.1 µF
= 0.010 max at 1 KHz, 0.015 max at 10 KHz,
0.030 max at 100 KHz.
For capacitance > 0.1 µF
= 0.0010 max at 1 KHz, 0.0015 max at
10 KHz.
Insulation resistance:
For nominal voltage < 100 V DC;
≥10,000
M Ohms
for C
≤
0.10 µF,
≥1,000
seconds for C > 0.10 µF.
For nominal voltage
≤
100 V DC;
≥
30,000
M Ohms for C
≤
0.10 µF,
≥1,000
seconds for C> 0.10 µF at a temperature of 25 ± 5 °C.
Capacitance tolerance:
±5%(J), ±10%(K) and ±20%(M)
Voltage Test:
1.6 times the rated
voltage applied between terminals for 2 seconds at a temperature of 25 ± 5 °C
Temperature range:
-55 to 100 °C with derating above 85 °C
Climatic category:
F M D
LIFE TEST DETAILS:
Capacitors shall withstand 125% DC rated voltage or 100% AC rated voltage applied at 85 °C for 1000 hours. After the test:
1. Capacitance change shall remain within ±5%.
2. Dissipation Factor shall be within 1.5 times the original limits.
3. Insulation Resistance shall be above 50% of the initial limits.
4. There shall be no remarkable change in the appearance and the marking shall remain legible.
DIMENSIONS
AND
TOLERANCES:
"d"
=
0.5 to 0.6mm
(0.020 to 0.024")
for dimension
“T”≤ 3.5mm
(0.138”)
"d"
=
0.6 mm (0.024")
for dimension “T” >3.5mm (0.138”)
"LL''
=
4.0 +1.5mm (0.16 +0.06") for Bulk Supply
PULSE RISE TIME (dv/dt) Volts per µsec.
RATED
VOLTAGE
50
63
100
100
100
250
400
Capacitance
RangeµF
0.001-1.0
0.001-1.0
>0.0068
0.0033-0.0068
>0.0033
0.001-1.0
0.001-1.0
dv/dt
value
4
8
10
15
30
20
40
Taping Dimensions for MKT 050 Series (5mm Pitch)
DESCRIPTION
d Lead wire dia.
P Tapingpitch
P0 Sprocketholepitch
P1 Centering of lead wire
P2 Centering of the body
p Lead spacing
dS Component alignment
H Height from Sproket
Center to component body
W
Tape width
W 0 Width of adhesive tape
W 1 Sprocket hole alignment
D0 Positionholediameter
t Tape thickness
DIMENSION
TOLERANCES
mm
Inches
mm
Inches
0.5 to 0.6 0.020 to 0.024
±0.05
±0.002
12.7
0.500
±1
±0.039
12.7
0.500
±0.2
±0.008
3.85
0.152
±0.7
±0.028
6.35
0.250
±1.3
±0.051
5
0.197
+0.6/ -1.1 +0.024/ -0.043
0
0.000
±2
±0.079
16.0, 16.5 0.630, 0.650
±0.5
±0.020
or 18.5
or 0.728
18
0.709
+1.0/ -0.5 +0.039/ -0.020
6 min.
0.236 min.
9
0.354
±0.5
±0.020
4
0.157
±0.2
±0.008
0.7
0.028
±0.2
±0.008
Packaging Specifications
Bulk, Tape/Reel & Ammo Pack
BOX SIZE
T x H x L
2.5 x 6.5 x 7.2
3.0 x 6.5 x 7.2
3.5 x 7.5 x 7.2
4.5 x 9.5 x 7.2
5.0 x 10.0 x 7.2
6.0 x 11.0 x 7.2
7.2 x 13.0 x 7.2
BULK
CARTON
3000
3000
2000
1500
1000
2000
1500
TAPED
REEL PACK
AMMO
PACK
2500
3500
2100
2900
1800
2500
1400
1900
1200
NA
1000
NA
800
NA
Analog electronics
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