RELIABILITY PREDICTION
How much is an assembly or component expected to fail in one million hours operating period ? This is the failure rate number. For example a Power Module has failure rate of 9.60. Then the MTBF (Mean Time Between Failures) of that Power Module is 104.166 hours. Just to know, one year is 8760 hours.
Do not calculate MTBF by your self, the software cost is thousand dollars. In house facility of ELSA now open to public. "Reliability Prediction for Electronic Parts" facility is waiting your order now. The calculation is based on MIL-HDBK-217.
Once the data entry completed, the calculation can be done for different temperature and stress.
| Minimum charge for max. 100 parts | : US$ 35.00 |
| Additional, every 10 parts | : US$ 2.00 |
| Re-run cost (for different environment) | : US$ 5.00 + 20% of service cost |
First of all, please down load the libraries (...pdf) and the part list form (rpppad.doc):
| Library | Remark |
| resistor.pdf
ic-c.pdf ic-hc.pdf ic-hct.pdf ic-pal.pdf memory.pdf diode.pdf transis.pdf ttl.pdf cmos.pdf linear.pdf inductor.pdf cap.pdf |
Resistor CMOS logic 54/74C...family HC logic HCT logic Programmable(PAL)IC Memory IC Diode Transistor TTL logic CMOS logic Linear IC Inductor Capacitor |
Choose
component's part number from library. Declare the parameter for
each part,
for example applied power, applied voltage, part name, quantity,
etc.
Finally, send this part list and the order form to our e-mail : services@nusaweb.com
Click here to download the Order form : rpppad.doc
If you
can't find the correct part or equivalent part, then you can fill
in the part model form. Another way is just define a failure rate
number.
Part model form to download : model.doc
The following is example of Reliability Analysis Calculation of Power Supply. It consists of two resistors, one capacitor, two transistors and two diodes.
RESISTOR LIST
| Part Numb. |
Part Name |
Qty |
Applied Power (Watts) |
| M55342K07B1E00P M55342K10B100DR |
R1 R2 |
1 1 |
0.00051 0.1 |
CAPACITOR LIST
| Part Numb. |
Part Name |
Qty |
Applied Voltage (Volts) |
| CU16BH102UPCU | C1 | 1 | 8 |
TRANSISTOR LIST
| Part Numb. |
Part Name |
Qty |
Package |
Quality |
Application (S, L) |
Applied Power |
Applied Voltage |
| 2N2222A | Q1, Q2 | 2 | TO-18 | Hermetic | Switching | 0.1 | 10 |
Application :
(S) Switching , (L) Linear
Package : TO-1, TO-18, TO-92, TO-220, .........
Quality : Hermetic, JAN, JANTX, JANTXV
DIODE LIST
| Part Numb. |
Part Name |
Qty |
Therm Res (deg C / W) |
Applied Power (Watts) |
Applied Voltage (Volts) |
Quality |
| 1N4007 | D1, D2 | 2 | 10 | 0.036 | 6 | Plastic |
Quality :
Hermetic, JAN, JANTX, JANTXV, Plastic
Therm Res : Thermal Resistance in deg C / Watts
Page: 1
RELIABILITY
PREDICTION PROGRAM VERSION 6.0
POWER
System: PS Des: POWER SUPPLY 5V
Wednesday April 15, 1998 2:18 p.m
Assembly No: PS Description: POWER SUPPLY 5V
| Part Number | Device Style | Description | Qty/ Ref | Failure Rate |
| CU16BH102UPCU 1N4007 2N2222A M55342K07B1E00P M55342K10B100DR |
CUR
Electrolytic Al Oxide Low Freq Analog Low Freq Bipolar RM Film Chip RM Film Chip |
Capacitor,
1000 µF ,30 V Diode, 1 A, 1000 V Transistor, Npn, 40 V 0.4 Watt Resistor, Chip, 1000 Ohm Resistor, Chip, 100 Ohm |
C1 D1,D2 Q1,Q2 R1 R2 |
0.07487 0.02366 0.00313 0.00577 0.00056 |
Assembly Base Failures: 0.10800
Assembly Failure Rate: 0.10800
Assembly MTBF: 9,259,164.5
Assembly % Contribution: 100.00
PT.
ELEKTRINDODAYA PAKARNUSA
Margawangi 3 - Lingkungan Industri Kecil (LIK) Unit C-8
Jl. Soekarno Hatta Km.13,8 - BANDUNG 40613 - INDONESIA
Telex 24232 ELSABD IA
Telp.(62 - 22) 7801536 or 7801691 FAX.(62 - 22) 7801690
E-mail : services@nusaweb.com