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FFLC14MC4427 Datasheet(PDF) 4 Page - AVX Corporation |
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FFLC14MC4427 Datasheet(HTML) 4 Page - AVX Corporation |
4 / 9 page JUNE 2015 ■ 45 Medium Power Film Capacitors FFLC MEAN TIME BETWEEN FAILURE (MTBF) MTBF = 1 /λ hours MTBF CALCULATION GENERAL FAILURE RATE The failure rate λB depends on hot spot temperature θHS and charge ratio ρ. ρ = Uw/Un ( ) ) ( in failures/hour λ=λB x πQ x πB x πE failures/hour • πQ, πB and πE see following tables Qualification Qualification factor πQ Product qualified on IEC61071 1 and internal qualification Product qualified on IEC61071 2 Product answering on 5 another norm Product without qualification 15 Environment Environment factor πE On ground (good conditions) 1 On ground (fixed materials) 2 On ground (on board) 4 On ship 9 On plane 15 Environment Environment factor πB Favorable 1 Unfavourable 5 SURVIVAL FUNCTION N = N0 x exp (- λt) N is the number of pieces still working after t hours. N0 is the number of pieces at the origin (t = 0) FAILURE MODE Main failure mode due to AVX’s Controlled Self-Healing Technology is only losses of capacitance. Thanks to Controlled Self-Healing solution to interrupt self-healing process in order to prevent avalanche effect due to polypropylene molecular cracking producing gas and potential explosion in confined box for none Controlled Self-Healing capacitors. |
Similar Part No. - FFLC14MC4427 |
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Similar Description - FFLC14MC4427 |
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