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SMM SERIES
SMM Series
Ⅲ
Engineering Bulletin Mar 07
Snap Mount Ⅲ Downsize Ⅲ High Voltage Ⅲ Long Life Ⅲ RoHS Compliant Ⅲ 85؇C Maximum Temperature
The SMM series is a high voltage, long life snap -in capacitor series that offers downsized versions of the SMH series. Compared to our SMH series, the SMM capacitors have a longer rated lifetime of 3,000 hours with the full rated ripple curr ent applied and are also one case size smaller than equivalently rated SMH capacitors. These characteristics allow downsizing for many power supplies and will provide better reliability due to increased life. The SMM capacitors are available in 2 or 4-pin snap-in styles and 4-pin straight terminals. The SMM series capacitors are RoHS compliant offering Pb-free construction. The standard SMM series capacitors are not solvent proof. Refer to guidelines and precautions on the website for usage and installation conditions recommended for United Chemi-Con products.
SNAP MOUNT 85؇ C
SMM
Summary of Specifications
Ⅲ PC board 2 or 4-pin snap-in; optional 4-pin straight terminals. Ⅲ Capacitance range: 47 to 3,300μF. Ⅲ Voltage range: 160 to 450VDC. Ⅲ Category temperature range: 25؇C to 85؇C. Ⅲ Leakage current: 3 CV (μA) maximum after 5 minutes at 20؇C. Ⅲ Standard capacitance tolerance: ؓ20% Ⅲ Nominal case size (DL): 2025mm to 3550mm. Ⅲ Rated lifetime: 3,000 hours at 85؇C with the rated ripple current applied.
United Chemi-Con, Inc. 9801 W. Higgins Road, Rosemont, IL 60018 Tel 847-696-2000 Fax 847-696-9278 www.chemi-con.com
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SMM Series
SMM Specifications - Snap Mount
Item Category Temperature Range Rated Voltage Range Capacitance Range Capacitance Tolerance Leakage Current Dissipation Factor ( Tan ␦) 25 to 85؇C 160 to 450VDC 47 to 3,300F ؓ20% ( M ) at 20؇C, 120Hz I ≤ 3 CV ( A ) after 5 minutes at 20؇C. Characteristics
Engineering Bulletin Mar 07
Where I = Max. leakage current ( A ), C = Nominal capacitance ( F ) and V = Rated voltage ( V ) At 20؇C, 120Hz
Rated Voltage ( V ) Tan ␦ ( DF ) Max. 160 - 400 0.15 420 - 450 0.20
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 Voltage ( V ) Z (25؇C ) / Z (20؇C ) 160 - 400 4 420 - 450 8
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 )
SNAP MOUNT 85؇ C
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
SMM
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 va.