The N series Metallized Polypropylene capacitors are ideally suited for applications requiring low Dissipation Factor, high Insulation
Resistance combined with a very low Dielectric Absorption and a low Temperature coefficient. All series N capacitors are dry-section,
non-polar, non-inductive self-healing designs. For low ESR, high-frequency, high-current applications, please see our VW series
data sheets and for high DV/DT requirements refer to the P series engineering data sheet.
Series N capacitors are available in several case styles; Oval, Wrap and Fill (NW style), Round, Wrap and Fill (NR style), Axial Leaded
Epoxy Case (NE style), Radial Leaded Epoxy Case (NF style) and both Round and Rectangular Hermetically Sealed Tubes
(NL and NG styles).
Contact our Engineering Department for special sizes, configurations, capacitance values and AC applications with Anti-Corona
construction at all frequencies. All N series capacitors are available in a variety of metal and plastic enclosures. To help facilitate
the high performance characteristics of the N series capacitors, we offer several lead configurations (i.e. screw mount tabs, tinned
copper ribbon, braided and insulated leads), for non-magnetic applications, tin coated copper leads can be supplied.
Range: -55°C to +105°C without voltage de-rating.
Series N capacitors shall be capable of withstanding a test of 1000 hours at 105°C and 100% of the DC rated voltage or a test
of 250 hours at 105°C and 140% of the DC voltage. The voltage shall be applied to each capacitor through its individual
current-limiting resistor as determined from the formula R = 0.025/C where C is the nominal capacitance in farads and R is in
ohms. The test procedures shall be in accordance with MIL-PRF-55514 except as noted herein. Not more than one failure in
twelve shall be permitted. Any one of the following shall be considered a failure.
a. A change in capacitance of more than 10% from its initial value.
b. An increase in Dissipation Factor to a value greater than 150% of the accepted limit.
c. A decrease in Insulation Resistance to a value less than 30% of the acceptance limit for 25°C
d. A permanent short or open.
Series N capacitors utilize tin-plated, copper-clad steel wire terminals, which shall be capable of withstanding the following
test without mechanical damage to the capacitor or terminals.
a. PULL TEST The capacitor shall withstand a steady pull of 5 pounds axially to the leads for one minute.
b. BEND TEST The wire lead terminals shall be bent at a point of ¼ inch from the body of the capacitor, first 90 degrees
in one direction, then back to the original position, and then 90 degrees in the opposite direction.
Series N capacitors shall be capable of withstanding a vibration test in accordance with MIL-STD-202, Method 201.
The following details and exception shall apply:
Mounting: The capacitor body shall be rigidly mounted by the entire length to the vibration test fixture. The leads
shall be soldered to rigidly supported terminals and so spaced that the length of each lead from the capacitor is
1.2 ±1/8 inch from the edge of the supporting terminal.
Measurement during Test: During the last cycle in each direction, an electrical measurement shall be made to
detect intermittent contact (not to be confused with “self healing” clearings) or open or short-circuiting.
Examination after Testing: Capacitors shall be visually examined for mechanical damage.
Updated: March 11, 2009Publisher: American Capacitor Corporation
Copyright © 2009 American Capacitor Corporation. All rights reserved.