PPR Range


PPR Range

The PPR range are in the form of a hermetically sealed rectangular Polypropylene case. Standard terminations are M10 threaded inserts.


The PPR range of capacitors utilise a mixed dielectric material that consists of polyester or polypropylene film and capacitor paper and are impregnated and filled with a mineral oil. The container is a robust rectangular polypropylene case. The internal construction is designed to prevent movement when the capacitor is subjected to mechanical shock or vibration. An inert welding process ensures hermetic sealing. Standard terminations are M10 threaded inserts as the plastic case eliminates the need for large high voltage stand-off terminals. (Other terminal types are available on request). The case has an extremely low affinity for moisture and is resistant to virtually all electrical environments. Brackets can be welded on as required.

NOTE: The impregnant used is a non toxic highly refined, purified and inhibited mineral oil.

APPLICATIONS:The PPR range is designed specifically for DC applications such as filters, bypass, coupling, rapid discharge, pulse forming networks and high voltage power supplies such as those found in radar, laser and X-ray equipment. They are particularly suited for use in portable equipment.

Capacitance Range: 0.002µF – 100µF. The tolerance is +/-10%. Other tolerances are available on request. Nominal values measured at 1kHz.

Temperature Range: -40°C to 85°C. The nominal voltage rating is applicable from -55°C to 85°C. Derating is required for higher operating temperatures.

Temperature Coefficient: Capacitance will increase by 2% per 100°C temperature change.

Voltage Range: 1kVDC – 300kVDC



Ripple: The sum of the peak ripple voltage and the DC voltage should not exceed the rated voltage. The graph above shows permissible peak-to-peak ripple voltage as a percentage of rated voltage for various frequencies.

Power Factor

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Power Factor: Variable; function of temperature and frequency. See fig 2. Nominal value < 0.5% at 20ºC.

Dieletric Resistance

insulance temp03.jpg

Dieletric Resistance: (Parallel resistance) Indicated by the graph of insulance (Mohms x µF) vs Temperature (fig 3). The insulance(Mohms x µF) is nominally 10000s at +20ºC. (Measurements taken after 1 minute with an applied voltage of 500V).

Life expectancy

life 03.jpg

Life expectancy: PPR type capacitors are designed for a life expectancy of 50000 hours at 65ºC. To achieve the same life expectancy at 85ºC derate to 60% of rated voltage.



Part Number Cap uF DC Kilo-Volts A B C
PPR 150-1040.1157575142
PPR 200-5040.520100130200
PPR 300-5040.530130220185
PPR 320-1040.132110110180
PPR 350-1040.13590100190
PPR 350-2040.235110120218
PPR 350-5040.535110130440
PPR 400-3040.340110150320
PPR 450-2540.2545100130380
PPR 500-1030.01507090245
PPR 500-1040.150115130275
PPR 500-5040.550175235280
PPR 600-4030.046090100235
PPR 650-1040.165110120318
PPR 750-5030.057580110365
PPR 750-1040.175115130365
PPR 750-2540.2575175190365
PPR 1000-2530.0251008090420
PPR 1000-4030.04100120200285
PPR 1000-1040.1100125175445
PPR 1500-1030.0115090100340
PPR 1500-2030.0215090100560
PPR 2000-5020.0052009090385
PPR 3000-2520.00253007095555


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