Metallized Polypropylene Capacitors

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METALLIZED POLYPROPYLENE

LOW LEAKAGE, HIGH INSULATION RESISTANCE
SELF-HEALING, HIGH RELIABILITY
DC OPERATION: BLOCKING, COUPLING, BYPASS, R. F. CIRCUITRY,
R.C. CIRCUITS, COMPUTERS AND INSTRUMENTATION
AC OPERATION: POWER FACTOR, LINE FILTERING
NEGATIVE TC IS ACCEPTABLE FOR USE WITH FERRITE INDUCTORS

STYLE "A2"

POLYESTER TAPE WRAP, END FILLED WITH EPOXY
LOWEST POSSIBLE VOLUME
RECTANGULAR-OVAL SHAPE, AXIAL LEADS
DESIGNED TO MEET THERMAL SHOCK, VIBRATION AND MOISTURE

RESISTANCE SPECIFICATIONS

Wrap and fill capacitors are available in cylindrical-axial lead units. Designation is "GA1". Hermetically sealed and pre-molded plastic case types are also available. Please contact factory or representative indicated on last page.

SPECIFICATIONS

CONSTRUCTION: Metallized polypropylene capacitors are available only in extended foil (non-inductive) construction.

PACKAGING: Polyester tape wrap with epoxy endfills gives the best possible volume density for this type unit.

LEADS: Copperweld (steel, coated with 30% copper by weight and tinplated with 60-40 Sn-Pb) is standard and may be soldered or welded in circuit assembly. Nickel "A" leads. available upon request.

TEMPERATURE RANGE: May be operated at rated DC voltage from -55°C to + 85°C or to + 105° C at voltages, indicated by the aerating curve on page 3.

ELECTRICAL [NON-DESTRUCTIVE] TESTS:

Capacitance shall be measured at or referred to 1000 ± 20 Hz at 25 ± 5°C for capacitance values up to and including 1.0 mfd. Capacitance values greater than 1.0 mfd., shall be measured at 60 ± 6 Hz.
Ref: MIL-STD-202E, Method 305.
Dissipation factor shall be measured as described for capacitance and shall not exceed 0.2%. Typical values, throughout temperature range, are given on curves page 3.
Insulation resistance shall be measured at rated voltage or 500 VDC, whichever is less. After 2 minutes electrification, minimum values shall be 200,000 MEG/MFD., need not exceed 400,000 megohms.
Ref: MIL-STD-202E, Method 302.
Dielectric Strength: Capacitors shall withstand specified DC test potential for 60 seconds through a limiting resistance of 1 ohm/volt.
Terminal to terminal - 150% of DC rating.
TerminaI to case - 200 % of DC rating.
Ref: MIL-STD-202E, Method 301.
Dielectric Absorption: Dielectric absorption shall not exceed 0.1% when tested to MIL-C-19978D.
Ref: MIL-C-19978D, Paragraph 3.22.

ENVIRONMENTAL TESTS:

Vibration: Capacitors will meet or exceed the requirements of MIL-STD-202E, Method 204C.
Moisture Resistance: Capacitors will meet or exceed the requirements of MIL-STD-202E, Method 103B, Condition B, with 500V or rated voltage applied, whichever is less.
Life Test: Will withstand 140% of rated DC voltage for 250 hours at 105°C. No more than 1 failure in 12 units permitted when tested.
Lead Pull Test: The leads on these capacitors shall withstand a steady axially applied pull of 5 lbs. for one minute.

CUSTOM DESIGN

Available on short notice - special shapes, values, characteristics, combination sections and networks. Non-metallic cases or fabricated steel and brass with glass-to-metal seals. Engineering service is expert and prompt.

APPLICATIONS

Metallized Polypropylene capacitors, in style "GA2" oval wrap and fill cases offer the user the best possible volume density for this type unit. These units have consistently met the environmental requirements of MIL-C-55514A and moisture resistance per MIL-STD-202E, Method 103B.

Metallized Polypropylene capacitors combine the reliability of self-healing action with high dielectric strength and insulation resistance of Polypropylene film.

Metallized Polypropylene capacitors are designed primarily for DC application -- blocking, coupling, bypass, DC line filtering - where RF and audio components are small in comparison to DC rating. However, they have been used successfully in such AC power applications as power factor correction and AC line filtering.

Metallized Polypropylene capacitors operate at all temperatures from -55 to + 85°C., derate to 60% at 105°C.