|
High speed Switch Mode Power Supply (SMPS) capacitors have the following characteristics when compared to other capacitive elements:
- Lower Equivalent Series Resistance (ESR)
- Lower Equivalent Series Inductance (ESL)
- Lower ripple voltage and less self heating
Absolute Maximum Output Capacitance
Assuming no ESL and no ESR
Mil-PRF-49470 Qualified, DSCC 87106 & custom product available.
|
|
Physical Characteristics
| Style |
Size |
Dimensions |
A
max |
B
max |
C
±0.025” |
D
±0.025” |
E
max |
Leads/
Sides |
| SMP-3 |
(in) |
0.650 |
0.715 |
0.450 |
1.050 |
0.500 |
10 |
| (mm) |
16.50 |
18.16 |
11.42 |
26.65 |
12.69 |
| SMP-4 |
(in) |
0.650 |
0.715 |
0.400 |
0.400 |
0.440 |
4 |
| (mm) |
16.50 |
18.16 |
10.15 |
10.15 |
11.17 |
| SMP-5 |
(in) |
0.650 |
0.715 |
0.250 |
0.250 |
0.300 |
3
|
| (mm) |
16.50 |
18.16 |
6.35 |
6.35 |
7.62 |
Impedance vs. Frequency
|
ESR vs. Frequency
|
|
Absolute Maximum Capacitance ESR
Assuming no ESL - Capacitive Induced Ripple
|
Absolute Maximum Capacitance ESL
Assuming no ESR - Capacitive Induced Ripple
|
|
| Test Group |
Test
Order |
Test |
Test Method |
Post Test Requirements |
Sampling Procedure |
| Group A |
1 |
Visual and Mechanical |
|
|
13 Samples
0 Failures |
| 2 |
Materials, Designs, Construction and Workmanship |
|
|
| 3 |
Physical Dimensions
and Marking |
|
|
| 4 |
Capacitance and Dissipation Factor |
MIL-STD-202 Method 305 |
|
100% |
| 5 |
Dielectric Withstanding Voltage |
MIL-STD-202 Method 301,
2.5x DCWV except 500V @ 1.5x |
|
| 6 |
Insulation Resistance |
MIL-STD-202 Method 302
@ DCWV, 25 C |
>100,000 megohms or 1,000 megohm-uF, whichever is less |
Group B
Sub Group I |
1 |
Voltage & Temperature Limits |
|
|
12 Samples
1 Failure |
| 2 |
Resistance to Solvents |
MIL-STD-202 Method 215 |
|
| 3 |
Immersion |
MIL-STD-202 Method 104
test condition B |
No mechanical damage.
Dielectric strength, capacitance,
df and 25 C IR to original limits |
| 4 |
Terminal Strength |
MIL-STD-202 Method 211 test condition A. Case codes 1-4, 6-5 lbs case code 5-4 lbs |
No evidence of loosening
or rupturing of terminals |
Group B
Sub Group II |
1 |
Resistance to
Soldering Heat |
MIL-STD-202 Method 210 N lead style test condition B, J and L styles test condition I |
No mechanical damage.
Dielectric strength, capacitance,
df and 25 C IR to original limits |
12 Samples
1 Failure |
| 2 |
Moisture Resistance |
MIL-STD-202 Method 106,
20 cycles |
No mechanical damage.
Dielectric strength, capacitance,
df and 25 C IR to original limits |
Group B
Sub Group III |
1 |
Life |
MIL-STD-202 Method 108, 1000 hrs. 2x DCWV except 1.2x 500 DCWV |
No mechanical damage.
Dielectric strength, capacitance, df,
125 C IR and 25 C IR to original limits |
12 Samples
1 Failure |
| Optional |
|
Solderabililty Group A |
|
|
|
| |
Thermal Shock and Voltage Conditioning |
|
|
| |
Ultrasonic Examination |
|
|
| |
Destructive Physical Analysis |
|
|
| |
Shock, Specified Pulse |
|
|
| |
Vibration, High Frequency |
|
|
| |
Humidity, Steady State – Low Voltage |
|
|
| |
Barometric Pressure |
|
|
|
|
