United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com2/11
SMM Series
SMM Specifications - Snap Mount
Item
Category Temperature Range
ⴑ
25 to
ⴐ
85ⴗC
Rated Voltage Range 160 to 450VDC
Capacitance Range 47 to 3,300F
Capacitance Tolerance
ⴣ
20% (M) at
ⴐ
20ⴗC, 120Hz
Leakage Current I ≤ 3 CV (A ) after 5 minutes at
ⴐ
20ⴗC.
Where I = Max. leakage current (A ), C = Nominal capacitance (F) and V = Rated voltage ( V )
Characteristics
Rated Voltage (V )
Tan ␦ (DF ) Max.
160- 400
0.15
420- 450
0.20
Dissipation Factor (Tan ␦)At
ⴐ
20ⴗC, 120Hz
Rated Voltage (V )
Z(
ⴑ
25ⴗC)/Z(
ⴐ
20ⴗC)
160- 400
4
420- 450
8
Low Temperature
Characteristics
At 120Hz, impedance (Z ) ratio between the
ⴑ
25ⴗC value and
ⴐ
20ⴗC value shall not exceed
the values given below.
Rated Ripple Current Multipliers Ambient Temperature (ⴗC)
ⴐ
45ⴗC
1.73
ⴐ
60ⴗC
1.50
ⴐ
70ⴗC
1.32
ⴐ
85ⴗC
1.00
Frequency (Hz )
DC Rated Voltage
160- 250V
315-450V
50Hz
0.81
0.77
120Hz
1.00
1.00
300Hz
1.17
1.16
1kHz
1.32
1.30
10kHz
1.45
1.41
50kHz
1.50
1.43
Shelf Life The following specifications shall be satisfied when the capacitors are restored to
ⴐ
20ⴗC after
exposing them for 1,000 hours at
ⴐ
85ⴗC without voltage applied. The rated voltage shall be
applied to the capacitors for a minimum of 30 minutes, at least 24 hours and not more than
48 hours before the measurements.
Capacitance change: ≤
ⴣ
15% of initial measured value
Tan ␦ (DF) : ≤ 150% of initial specified value
Leakage current : ≤ initial specified value
Endurance
(Load Life)
The following specifications shall be satisfied when the capacitors are restored to
ⴐ
20ⴗC after
subjecting them to DC voltage for 3,000 hours at
ⴐ
85ⴗC with the rated ripple current applied.
The sum of the DC voltage and peak AC voltage must not exceed the full rated voltage of
the capacitors.
Capacitance change: ≤
ⴣ
20% of initial measured value
Tan ␦ (DF) : ≤ 200% of initial specified value
Leakage current : ≤ initial specified value
SMM
SNAP MOUNT 85ⴗC
Engineering Bulletin Mar 07
