United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com

2/ 11

SMM Series

SMM Specifications - Snap Mount

Item

Category Temperature Range

25 to

85 C

Rated Voltage Range

160 to 450VDC

Capacitance Range

47 to 3,300 F

Capacitance Tolerance

20% ( M ) at

20 C, 120Hz

Leakage Current

I

≤ 3 CV ( A) after 5 minutes at 20 C.

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

20 C, 120Hz

Rated Voltage ( V )

Z( 25 C) / Z ( 20 C)

160 - 400

4

420 - 450

8

Low Temperature

Characteristics

At 120Hz, impedance ( Z ) ratio between the

25 C value and

20 C value shall not exceed

the values given below.

Rated Ripple Current Multipliers

Ambient Temperature ( C)

45 C

1.73

60 C

1.50

70 C

1.32

85 C

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

20 C after

exposing them for 1,000 hours at

85 C 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:

≤ 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

20 C after

subjecting them to DC voltage for 3,000 hours at

85 C 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:

≤ 20% of initial measured value

Tan

(DF)

:

≤ 200% of initial specified value

Leakage current

:

≤ initial specified value

Engineering Bulletin Mar 07