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24V 0.21A, Isolated 5W Regulated Single Output 4.25kVAC, AC-DC Converters, 85-264VAC/120-370VDC Input
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*1 Non-critical circuits
This term refers to circuits in implanted medical devices that are not directly linked to life support, i.e. circuits that will not directly endanger the life of the patient should the functionality of the device be reduced or halted by failure of the circuit.
*Usually MLCC used with derating. So even this kind of products, special derating have not set specially.
Please refer to below links for details
For general purpose
Only for mobile devices
Mobile application specific MLCC
These MLCC products are designed for use in devices with a typical lifetime of less than 5 years.
(Examples: Cellular phone, Smartphone, Tablet PC, Digital camera, Watch, Electronics dictionary, Small-scale server, IPC-9592B class1 equipment, etc. )
These MLCC products are designed so that the useful lifetime can be extended longer than 5 years under the following conditions:
「80% of the rated voltage or less, Maximum operating temperature -20 degree C or less」
Extended useful lifetime, under specific operating conditions, can be estimated from the following chart.
Lifetime of MLCC can also be estimated from voltage acceleration and temperature acceleration factors.
Please refer to following URL about these lifetime estimation.
Ceramic Capacitors FAQ "Are there any methods for estimating the lifetime of a capacitor? "
Useful lifetime for mobile application specific MLCC