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Cx Family Common Mode Chokes
0402CT Low Profile Chip Inductors
XAL7050 High-inductance Shielded Power Inductors
XGL4020 Ultra-low DCR Power Inductors

Failure Rate Calculation

Failure in Time Values (FIT, MTBF)

View PDF data sheet

Our steady state FIT values are calculated per Telcordia SR-332 Issue 4 (2016). These calculations are based on the following conditions:

Environment Ground, Fixed, Controlled
Device Method I-D
Quality Level II
Electrical stress 50%
Operating Temperature 85°C
Activation energy 0.15 eV
MTBF = 109 (hours) / FIT

  Telcordia SR-332 Issue 4*
90% UCL 60% UCL
RF Magnetics FITs
(ppb hours)
(ppb hours)
Chip inductors, air core inductors, RFID coils 0.22 4.545E+09  0.23 4.348E+09
Tunable inductors 3.42 2.924E+08   3.59 2.786E+08
Broadband conical inductors 0.48 2.083E+09 0.51 1.961E+09
Wideband RF transformers / baluns / chip transformers 9.25 1.081E+08 9.71 1.030E+08
Power Magnetics
SMT and THT power inductors 0.48 2.083E+09 0.51 1.961E+09
Coupled power inductors 10.06 9.940E+07 10.55 9.479E+07
Transformers / Current sensors 10.06 9.940E+07 10.55 9.479E+07
EMI Magnetics
CM chokes 10.06 9.940E+07 10.55 9.479E+07

*Note: All calculations are based on the following conditions: Ground, Fixed, Controlled Environment, I-D Device Method, Quality Level II, 50% electrical stress, 85°C operating temperature, and 0.15 eV activation energy.