The UL94 V-0
approved epoxy resin coating is applied by fluidised bed technique. The
coating finish is hard, smooth and has good appearance to harmonise with
other electronic components.
If this range
of Resistors experience surface temperatures regularly in excess of 150
°C, the coating will tend to degrade slightly, becoming darker. Though
unsightly, performance is not compromised.
Whilst the coating can reduce the rate of moisture ingress, it is not
impervious to liquids.