| |
RATING (hours) |
|
|
+35°C |
+45°C |
+55°C |
+65°C |
+75°C |
+85°C |
|
32,000 |
16,000 |
8,000 |
4,000 |
2,000 |
1,000 |
|
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
2,000 |
|
96,000 |
48,000 |
24,000 |
12,000 |
6,000 |
3,000 |
|
128,000 |
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
|
160,000 |
80,000 |
40,000 |
20,000 |
10,000 |
5,000 |
| |
RATING (hours) |
|
|
+35°C |
+45°C |
+55°C |
+65°C |
+75°C |
+85°C |
+95°C |
+105°C |
|
128,000 |
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
2,000 |
1,000 |
|
256,000 |
128,000 |
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
2,000 |
|
384,000 |
192,000 |
96,000 |
48,000 |
24,000 |
12,000 |
6,000 |
3,000 |
|
512,000 |
256,000 |
128,000 |
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
|
640,000 |
320,000 |
160,000 |
80,000 |
40,000 |
20,000 |
10,000 |
5,000 |
| |
RATING (hours) |
|
+35°C |
+45°C |
+55°C |
+65°C |
+75°C |
+85°C |
+95°C |
+105°C |
+115°C |
+125°C |
|
512,000 |
256,000 |
128,000 |
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
2,000 |
1,000 |
|
768,000 |
384,000 |
192,000 |
96,000 |
48,000 |
24,000 |
12,000 |
6,000 |
3,000 |
1,500 |
|
1,024,000 |
512,000 |
256,000 |
128,000 |
64,000 |
32,000 |
16,000 |
8,000 |
4,000 |
2,000 |
16,000 hours = 1.83 years |
24,000 hours = 2.74 years
32,000 hours = 3.65 years |
48,000 hours = 5.48 years
64,000 hours = 7.31 years |
96,000 hours = 11.0 years
128,000 hours = 14.6 years |
256,000 hours = 29.2 years |
:: Wear-Out Accelerators
Electrical Overstress | Corrosive Agents | Reduced Pressure
:: Load Life Rating Follows
Arrhenius Rate Law
Temperature increase of 10oC approximately doubles the rate of
the reaction
+ End-seal and electrolyte directly relates to component load
life rating
+ In-circuit wear out rate is chiefly dependent upon operating
temperature |
|
|
|
Solid Electrolyte Electrolytic
Capacitors
|
|
(Functional Polymer) Solid Aluminum
Electrolytic
& Tantalum Electrolytic
Solid electrolytic capacitors are not limited with regards to
operational life.
They can operate far longer, and do not exhibit wear-out (dry-out)
limitations of liquid electrolyte construction (see above).
»
The table below
compares estimated FIT rates of solid aluminum electrolytic type as
compared to tantalum type.
»
Lower FIT rate indicates longer time to
failure.
|
|
Type |
NIC Series |
Package |
Features / Construction |
Estimated
Failure Rate (FIT) - Endurance |
SOLID ALUMINUM
Electrolytic Capacitor |
NPC
NSP
|
Molded Flat Chip
 |
Low Profile
Lower ESL**
Stacked
Element |
P/N: NSP101M6.3TRD3TR
[100uF / 6.3VDC]
 Acceleration Test Results @ Rated VDC & 105°C:
» Total Test Time = 19,796,000 hours
» No. of Failure = 0
» Failure Rate (FR) = (60% confidence; 0.917/T) = 46 FIT
Use
conditions: 6.3VDC & +25°C;
FR = 5.7 FIT
Field Failure Reporting:
» Total Test Time = 6,856,894,000 hours
» No. of Failure = 0
» FR = (60% confidence; 0.917/T) = 0.13 FIT |
|
NPC
Series - Failure Rate / MTTF
» Acceleration Test Results @
Rated VDC & 105°C
» Test Conditions: 2000HR
@+105°C
» Total Testing Time (Hour) = 5,880,000
» No. of Failure = 0
» Failure Rate (FR) = (60% confidence; 0.917/T) = 156 FIT
» MTTF (Hour) = 6.41 X 10^6 hrs |
|
 Guideline:
LINK
»
FIT Rate Comparison (NPC
to NSP)
» Typical Load Life Test Results
to 10,000 hours @ +105°C |
TANTALUM
Electrolytic Capacitor |
NTC-T
(MnO2
Cathode)
NTP
(Polymer
Cathode) |
Molded Flat Chip
 |
Small Size
Pressed
Element |
» Failure Rate (FR) = 74 FIT
@ 50%
voltage
de-rating &
3ohm/Volt series resistance |
|
Guideline:
LINK |
|
** - ESL - Equivalent
Series Inductance (nH): Lower ESL means better performance at
high frequency |
|
1 FIT = 1 FAILURE IN 1,000,000,000 HOURS |
Life
Formula
+105°C = 2000 hrs
+85°C = 20,000 hrs
+65°C = 200,000 hrs |
10,000 hours = 1.14 years |
20,000 hours = 2.28 years
30,000 hours = 3.42 years |
40,000 hours = 4.57 years
100,000 hours = 11.4 years |
200,000 hours = 22.8 years |
| NOTES:
|
- Solid aluminum type (NPC
&
NSP)
exhibit better performance (than standard tantalum types)
under short-circuit failure modes.
- The cathode material [Polyethylene -Dioxythiophene (PEDT)]
exhibits increased resistance, which acts to limit - restrict
current flow thru shorted element. This will occur as internal
heat reaches +300°C
|
|
|
A website of
NIC COMPONENTS CORP.
When operating at temperatures less than the RATED MAXIMUM use the
below table
in estimation
of LOAD LIFE - ENDURANCE
PERFORMANCE (hours) of Liquid Electrolyte
Aluminum Electrolytic Capacitors