Document 292 Failure Rate Calculation The steady-state FIT (Failure In Time) rate is calculated = λG Q S T (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) Q = 1.0 (from from Telcordia SR-332, Table 7-4 for Quality Level II) S = 1.0 (from from Telcordia SR-332, Table 7-6, assuming 50% electrical stress level) T = 2.0 (calculated for +85°C per Table 7-7 with Ea activation energy = 0.15 eV) RF Magnetics Steady state FITs (failures/billion hours) MTBF* (hours) 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 Steady state FITs (failures/billion hours) MTBF* (hours) 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, SER, SLC and XxL 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 Steady state FITs (failures/billion hours) MTBF* (hours) 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, DLC) 38 26,315,789 Filter assemblies (including PxLP and SxxP) 12 83,333,333 xDSL Magnetics xDSL transformers Steady state FITs (failures/billion hours) 38 MTBF* (hours) 26,315,789 *Calculated from FITs (MTBF=109 (hours) / FITs) US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 292 Revised 06/12/14 © Coilcraft Inc. 2014 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.