The steady-state FITs is calculated = λGπQπSπT (failures / billion hours) per Telcordia Technologies Special Report SR-332, Issue 1, May 2001.
Where:
λG = chosen from Telcordia SR-332, Table 7-1 (90% upper confidence level)
πQ = 1.0 (from Telcordia SR-332, Table 7-4 for Quality Level II)
πS = 1.0 (from Telcordia SR-332, Table 7-6, assuming 50% electrical stress level)
πT = 2.0 (calculated for +85°C per Table 7-7 with Ea activation energy = 0.15 eV)
Steady state FITs (failures/billion hours) |
MTBF* (hours) |
|
---|---|---|
RF Magnetics | ||
Chip inductors (all sizes) | 1.0 | 1,000,000,000 |
Air core "Spring" inductors (all sizes) | 1.0 | 1,000,000,000 |
90 Series axial lead inductors | 1.0 | 1,000,000,000 |
RFID transponder coils | 1.0 | 1,000,000,000 |
Tunable inductors (Unicoils, Slot Series) | 2.0 | 500,000,000 |
Conical broadband inductors | 38 | 26,315,789 |
Wideband RF transformers, chip transformers, baluns, directional couplers | 60 | 16,666,667 |
Power Magnetics |
||
Power chip inductors (PS, FS – all sizes) | 38 | 26,315,789 |
SMT inductors (DH, DO, DS, DT, EPL, LPD, LPO, LPS, ME, MLC, MOS, MSD, MSS, MVR, PFL, SER, SLC, XAL, XFL and XPL Series) |
38 | 26,315,789 |
Coupled power inductors (LPD, MSD, PFD) | 38 | 26,315,789 |
Fixed inductors (PCH, PCV, DMT, Mag Amps, etc.) | 38 | 26,315,789 |
Transformers (including base/gate drive, power factor controller, planar and CCFL) |
38 | 26,315,789 |
Current sensors | 38 | 26,315,789 |
EMI Magnetics and LC Filters |
||
Filter coils (including PDLF, PTRF, CCDLF, TTDLF, DLF) | 38 | 26,315,789 |
Common mode chokes (including DLF, PDLF, CCDLF, TTDLF, TRF, PTRF, TTTRF, P32xx, BU, USB Series) |
38 | 26,315,789 |
Filtered connectors (including TRFRJ, PCRJ) | 38 | 26,315,789 |
Filter assemblies (including PxLP and SxxP) | 12 | 83,333,333 |
xDSL Magnetics |
||
xDSL tranformers | 38 | 26,315,789 |
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