MINIATURE ALUMINUM ELECTROLYTIC CAPACITORS
series
Standard series for general purpose
Endurance : +85 °C 2,000 hours
RoHS Compliant
WK
WK 8 5 C
1808
SPECIFICATIONS
Items
Characteristics
-25~+85°C(160 to 450 Vdc)
Category Temperature Range
Rated Voltage Range
-40~+85°C(6.3 to 100 Vdc)
6.3~450 Vdc
±20%(M)
Capacitance Tolerance
(at 20°C,120Hz)
6.3~100 Vdc
160~450 Vdc
I≤0.03CV+10μA
Where, I: Max.leakage current (μA),C:Nominal capacitance (μF),
V: Rated voltage (V)
Leakage Current
I≤0.01CV or 3μA,
whichever is greater.
(at 20°C after 2 minutes)
Rated Voltage(Vdc)
tanδ (max.)
6.3
10
16
25
35
50
63 100 160 200 250 350 400 450
Dissipation Factor (tanδ)
0.24 0.20 0.16 0.14 0.12 0.10 0.09 0.08 0.20 0.20 0.20 0.24 0.24 0.24
When nominal capacitance exceeds 1,000μF , add 0.02 to the value above for each 1,000μF increase.
(at 20°C,120Hz)
Low Temperature
Characteristics
(Max. Impedance Ratio)
6.3
5
10
16
3
25
35
50
2
63 100 160 200 250 350 400 450
Rated Voltage(Vdc)
Z(-25°C)/Z(+20°C)
Z(-40°C)/Z(+20°C)
4
3
-
6
-
(at 120Hz)
12
10
8
5
4
3
The following specifications shall be satisfied when the capacitors are restored to 20°C after DC voltage plus the rated
ripple current is applied for 2,000 hours at 85°C.
Capacitance Change
D.F. (tanδ)
≤±20% of the initial value
Endurance
Shelf Life
≤200% of the initial specified value
≤The initial specified value
Leakage Current
The following specifications shall be satisfied when the capacitors are restored to 20°C after exposing them for 1,000 hours
at 85°C without voltage applied.
Capacitance Change
D.F. (tanδ)
≤±20% of the initial value
≤200% of the initial specified value
≤200% of the initial specified value
Leakage Current
DIMENSIONS[mm]
Sleeve(Black)
ØD
Ød
5
6.3
0.5
2.5
8
10 12.5
16
0.8
7.5
18
0.8
7.5
Ød
0.5
2.0
0.5
0.6
0.6
5.0
0.6
5.0
ØD'
F±0.5
F
ØD'
L'
3.5
ØD+0.5max.
L+2max.
L'
15min.
4min.
(Ø5~Ø18)
PART NUMBERING SYSTEM
E
WK 2G
M
3R3 G12 O- -
T
Sleeve Code: “C” for PVC, “T” for PET
Terminal code
Size code
Capacitance code
Capacitance tolerance code
Voltage code
Series code
Category code
RATED RIPPLE CURRENT MULTIPLIERS
Frequency correction factor for ripple current
Freq.(Hz)
Cap.(μF)
50
120
300
1k
10k
100k
2.50
0.65
1.00
1.35
1.75
2.30
Cap.<10
10≤Cap.<100
100≤Cap.≤1000
Cap.>1000
0.75
0.80
0.85
1.00
1.00
1.00
1.25
1.15
1.03
1.50
1.30
1.05
1.75
1.40
1.08
1.80
1.50
1.08
The endurance of capacitors is shortened with internal heating produced by ripple current
at the rate of halving the lifetime with every 5 °C rise. When long life performance is required
in actual use, the rms ripple current has to be reduced.
90