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A tolerance of 10% is preferred, with 20% being acceptable. Higher precision parts may be used if warranted by the application.
Package
Capacitors shall be MLCC 0603 SMD parts unless the application calls for characteristics requiring a larger package size.
Voltage Rating
At least 2x the expected maximum voltage in the application or 40V higher, whichever is less.
A capacitor with the highest voltage rating for a desired capacitance and package should be chosen if the cost is not significantly different. At a minimum caps shall be rated to at least 2x the expected maximum voltage in the application or 40V higher, whichever is less.
MLCC Dielectric
Class 2 X7R capacitors are preferred for most applications. For larger decoupling capacitors (>1uF) where precision is not paramount, X5R capacitors may be used. Class 1 C0G/NP0 capacitors shall be used in : preferred when available
X5R: when voltage/cap not available in desired package
C0G/NP0: low value, high precision applications due to their very stable DC bias characteristics.
Note that even X7R capacitors experience a significant drop in capacitance at higher voltages, typically > 50% drop at a 12V bias for 0603s. Graphs of capacitance vs DC bias for Murata caps can be found on their online simsurfing tool.
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Low power indicator LEDs are 0603 package. LEDs shall not be blue, as brief flashes on power-up/down looks like arcing.
Lighting
LEDs required in high power applications are of the JE2835 series.
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