SPECIFICATIONS

DIELECTRIC WITHSTANDING VOLTAGE

200% of rated voltage applied through a minimum limiting resistance of 100 Ohms/Volt. Duration of voltage stress shall be 15 seconds minimum and 1 minute maximum at 25°C.

INSULATION RESISTANCE

At 25°C after 2 minutes of electrification at rated voltage or 500 VDC, whichever is less, the minimum product of Insulation Resistance and Capacitance shall be 100,000 megohms-microfarads, but need not exceed 100,000 megohms.

DISSIPATION FACTOR

Shall not exceed 0.1% when measured at 25°C and 1000 Hz, ±20 Hz. See characteristic curves for D.F. ratings at other temperatures.

ESR VS. CAPACITANCE

See ratings and dimensions, next page.

RATED CURRENT

See ratings and dimensions, next page.

CAPACITANCE AND TOLERANCE

Shall be measured within the tolerance limits specified. Measurements will be made at 25°C and 1000 Hz, ±20 Hz.

LIFE TEST

Shall withstand 140% of rated voltage at 105°C for 250 hours. One failure in twelve shall be permitted.

TEMPERATURE COEFFICIENT

Capacitance shall change linearly over operating temperature range range of -55°C to +85°C at rate of -290, ±75 parts per million/°C.

CAPACITANCE STABILITY (DRIFT)

Less than .2% when measured in the following manner: three capacitance readings at 25°C, each made prior to and after temperature cycling from room to 105°C, and room to -55°C. The mathematical difference between the two extremes, divided by the intermediate value, and then multiplied by 100, yields the stability expressed in percent.

GENERAL DATA

All of the above style capacitors are intended specifically for use in switching power supplies. They are enclosed in a flame retardant housing that meets IEC publication 695-2-2, Needle Flame Test, Condition B. UL510 is also satisfied with this enclosure.

These metallized polypropylene capacitors have been designed by Wesco to eliminate, or drastically reduce the disadvantages of Electrolytic capacitors. Specifically, the lower ESR (at least an order of magnitude reduction) and the near elimination of "roll-off" (the decrease of capacitance with increasing frequency), dramatically improves the performance and efficiency of all switching power supplies.

FEATURES

• High current handling 
  
  
• Very low ESR values (at high frequency) 
  
  
• Dry, non-inductively wound 
  
  
• Wrap and fill construction 
  
  
• Small size 
  
  
• Quality control procedures per Mil-Q-9858 

APPLICATIONS

• High Frequency Switching Power Supplies 
  
  
• High Current Input/Output Filtering 
  
  
• D.C. Blocking 
  
  

HUMIDITY RESISTANCE

Meets requirements of Mil-C-27287, Para. 3.12 when tested in accordance with Mil-STD.-202, Method 103 B, Condition B.

LEAD PULL AND BEND TEST

Steady pull of 5 pounds applied axially to leads for one minute. Bend test shall consist of one bend from the point of egress, first 90° in one direction, back to the original axial position, and then 90° in the opposite direction with no evidence of breakage.

TEMPERATURE RANGE

-55°C to +105°C with full rated voltage applied.

DIELECTRIC ABSORPTION

Shall not exceed .05% when tested in accordance with Mil-C-19978.