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5. Specification and test methods
No. Item Specification Test method
1 Appearance and dimensions No marked defect on appearance
form and dimensions.
Please refer to [Part number list].
The capacitor should be inspected by naked eyes
for visible evidence of defect.
Dimensions should be measured with slide calipers.
2 Marking To be easily legible. The capacitor should be inspected by naked eyes.
3 Dielectric
strength
Between lead
wires
No failure. The capacitor should not be damaged when
AC4 000V(r.m.s.)<50/60Hz> is applied between the
lead wires for 60 s.
(Charge/Discharge current  50mA.)
Body
insulation
No failure. First, the terminals of the capacitor should be
connected together.
Then, a metal foil should be
closely wrapped around
the body of the capacitor
to the distance of
about 3 to 6mm
from each terminal.
Then, the capacitor should be inserted into a
container filled with metal balls of about 1mm
diameter.
Finally, AC4000V (r.m.s.)<50/60Hz> is applied for
60 s between the capacitor lead wires and metal
balls. (Charge/Discharge current  50mA.)
4 Insulation Resistance (I.R.)
10 000M min.
The insulation resistance should be measured with
DC50050V within 605 s of charging.
The voltage should be applied to the capacitor
through a resistor of 1M.
5 Capacitance Within specified tolerance.
The capacitance should be measured at 20C with
10.1kHz and AC5V(r.m.s.) max..
6 Dissipation Factor (D.F.) 2.5% max.
The dissipation factor should be measured at 20C
with 10.1kHz and AC5V(r.m.s.) max..
7 Temperature characteristic
Char. B : Within 10 %
Char. E : Within +20/-55%
(Temp. range : -25 to +85C )
The capacitance measurement should be made at
each step specified in Table.
8 Active flammability The cheese-cloth should not be
on fire.
The capacitors should be individually wrapped in at
least one but more than two complete layers of
cheese-cloth. The capacitor should be subjected
to 20 discharges. The interval between successive
discharges should be 5 s. The UAc should be
maintained for 2min after the last discharge.
C1,2 : 1F10%, C3 : 0.033F5% 10kV
L1 to L4 : 1.5mH20% 16A Rod core choke
R : 1002%, Ct : 3F5% 10kV
UAc : UR 5% UR : Rated voltage
Cx : Capacitor under test
F : Fuse, Rated 10A
Ut : Voltage applied to Ct
Step 1 2 3 4 5
Temp. (C) 202 -252202 852 202
Metal
foil
Metal
balls
A
bout
3 to 6 mm