Dipped Mica Capacitor - SIR Electronics Corp

Home > Buy Now > Active Components > Diodes > Dipped Mica Capacitor

Products

To Korean Page

visitors: 23929

SIR Electronics Corp
[Korea]

Address:
540-13 Songsun-ri, Janggi-myeon, Gongju-si, Chungcheongnam-do 314-914 Korea

Phone:
82-41-8582187

Contact name:
Anthony Kim , General manager

Products

	Dipped Mica Capacitor

Click to enlarge image

FEATURES OF SIR-MICA DIPPED MICA CAPACITORS

High Reliability and Stability

It is well known that natural mica is extremely stable against heat. SIR-MICA uses selected ruby mica from India with optimum electrical characteristics to manufacture SIR-MICA Dipped Mica Capacitors.
The silvered film is made by printing electrodes on mica film with silver paste. Silvered films are stacked up to the desired capacitance and fitted with external lead terminals. The element is dipped with a phenolic compound that preserves the excellent characteristics of mica without deforming the mica element. The coating is then vacuum-impregnated with epoxy-resin having high moisture and heat resistance, thus forming a mechanically strong envelope. The design assures both high reliability and
stability.

Compact and High Moisture-Resistance

Among many types of capacitor manufactured by SIR-MICA DM05 Type features an extremely small size.
A One Coat type is also available. Its coating is very thin yet it assures high installation density.
For devices including the One Coat type, moisture-proof sealing should be provided by the user.

Dipped Mica
Capacitor

Style

Characteristic

Nominal Capacitance
Identified by a
three-digit
number. The first
two digits represent significant figures
in pF and the last digit specifies the number of zeros to follow.

Tolerance
D(± 0.5pF)
F(± 1%)
G(± 2%)
J(± 5%)
K(± 10%)

Voltage
05(50V.DC)
1(100V.DC)
3(300V.DC)
5(500V.DC)

One Coat
(Only for
One Coat)

MARKING

STYLE ITEM	DM05	DM10	DM15	DM19	DM20	DM30	DM42
Characteristic	Omitted		Indicated with one of characteristic indication marks C.D.E.F
Nominal Capacitance		Identified by a three-digit number, the first two digits represent significant figures in pF and the last digit specifies the number of zeros to follow.
Capacitance Tolerance	Omitted	The tolerance is indicated by capital letter, i.e.D(+ _ 0.5pF), F(+_1%), G(+_2%) J(+_5%), K(+_10%)
Rated Voltage	Omitted		50WV, 100WV, and 300WV are indicated as 05, 1 and 3 respectively
Manuacturer's Mark	Omitted		SIR

SPECIFICATIONS

Materials for Lead Wire

Copper-clad steel wire(CP Wire)plated with solder or tin.

Solderability

When immersed in molten solder for 2 ± 0.5 seconds at 230 ± 5° ,at least 75percent of the lead wire shall be covered with a new smooth solder coating.

Operating Temperature Range

-55 to + 125°

Withstanding Voltage

200% of the rated voltage shall be applied for 1 to 5 seconds. The limiting value of surge current shall not exceed 50mA.

Insulation Reistance

When measred at 50± 5V for capacitors rated at 50V, or at 100 ± 10V for those of other ratings, the insulation resistance shall exceed the value shown in Fig.1.

Capacitance

When measured at 1kHz ± 10% and 1 to 5 Vms, the capacitance shall be within the specified tolerance.

Dissipation Factor(Nominal capacitance greater than 30pF)

D factor shall not exceed the values shown in Fig.3.

Quality Factor(Q)(Nominal capacitance less than 330pF)
Q shall exceed the values shown in Fig.4.

Temperature Coefficient and Capacitance Drift

Characteristic	Temperature coefficient ppm/°	Drift
C	-200~200	within ± (0.5%+0.1pF)
D	-100~100	within ± (0.3%+0.1pF)
E	-20~100	within ± (0.5%+0.1pF)
F	0~70	within ± (0.05%+0.1pF)

Insulation Grade

Mica capacitors shall be subjected to a simple harmonic motion having an amplitude of 1.5mm , the frequency being varied unifomly between the approximate limits of 10 and 55Hz. The entire frequency range, form 10 to 55Hz and retrun to 10Hz, shall be traversed in approximately 1minute and the motion shall be applied for a period of 1 hour in each 3 mutually perpendicular directions. Aftertesting, electrical measurements shall be performed.

Insulation Resistance:Shall exceed the value shown in Fig.2.

D factor and Q:Shall satisfy the value shown in Fig.3.

Capacitance Change:Shall not exceed ± 1% or 1pF, whichever is greater.

Soldering Heat Resistance

Immersing both leads within 4 ± 0.8mm of the capacitor in molten solder for 3± 0.5 second at 270 ± 5°

Withstanding Voltage:Capacitors shall withstand 200 percent the rated voltage for 1 to 5 seconds without damage, arcing or breakdown.

D Factor:Shall not exceed the value in Fig.3.

Capacitance Change:Shall not exceed ± 0.1% or 1pF, whichever is greater.

Moisture Resistance(Applied to standard type)
Capacitors shall be subjected to a temperature of 40 ± 2° at 90 to 95% relative humidity for 240 ± 8 hours.

withstanding Voltage:Capacitor shall withstand 200 percent the rated voltage for 1 to 5 seconds without damage, arcing or breakdown.

Insulation Resistance:Shall not be less than 50,000Mohm

Dissipation Factor:Shall not exceed 0.0035.

Capacitance Drift:Shall not exceed ± 1% or 1pF, whichever is greater.

Temperature and Immersion Cycling(Applied to standard type)

After 5 cycles of temperature sequcnce:
-25 +0° (30min)-normal temperature (10 to 15 minutes)
****-3
-70 +3° (30min)-normal temperature (10 to 15 minutes)
****-0

Capacitors shall be subjected to 2 cycles of immersion sequence : 65 +5
-0° fresh water for 15 minutes and 0 ± 3° saturated salt solution for 15 minutes.
Afterward, capacitors shall be washed in running water, wiped off and kept at normal
temperature prior to measurement.

Visual Examination:There shall be no cracks or other mechanical damage.

Withstanding Voltage:Capacitors shall withstand 200 percent of the rated voltage for 1 to 5 seconds without damage, arcing or breakdown.

Insulation Resistance:Shall not be less than 50,000Mohm

Dissipation Factor:Shall not exceed 0.0035.

Capacitance Change:Shall not exceed ± 1% or 1pF, whichever is greater.

Life(Applied to standard type)

Capacitors shall be subjected to a temperature of 85° with 150 percent the rated voltage for 1000 ± 12 hours.After testing , the following requirements shall be satisfied.

Visual Examination:There shall be no cracks or other mechanical damage.

Withstanding Voltage:Capacitors shall withstand twice the rated voltage for 1 to 5 seconds without damage, arcing or breakdown.

Insulation Resistance:Shall not be less than 50,000Mohm

Quality Factor:shall exceed the values shown in Fig.1.

Dissipation Factor:Shall not exceed 0.0025.

Capacitance Change:Shall not exceed ± 3% for characteristic C and ± 2% for characteristic D,E,F, or 1 pF, whichever is greater.

Moisture Resistance Loading

Capacitors shall be subjected to a temperature of 40 ± 2° at 90 to 95% relative humidity with rated voltage applied for 240 ± 8 hours. After being maintained at normal temperature and humidity for a period of 4 to 24 hours, the following requirements shall be satisfied.

Visual Examination:There shall be no cracks or other mechanical damage.

Withstanding Voltage:Capacitors shall withstand twice the rated voltage for 1 to 5 seconds without damage, arcing or breakdown.

Insulation Resistance:Shall not be less than 10,000Mohm

Dissipation Factor:Shall not exceed 0.0035.

Quality Factor(Q):shall exceed 1/3 of the initial value shown in Fig.4.

Capacitance Change:Shall not exceed ± 1% or 1 pF, whichever is greater.