Identify small black cubic component with 2 pins

Question

I found this component between my supply of resistors, motors, Arduino etc: (ruler for scale)

It is a small black cuboid (.4cm x .4cm x .2cm) with 2 pins (1.7cm) connected to it. On the front face is written in white:

2C1
100V
83 26

On the top:

470pK

Does somebody know what component this is and what the numbers written on it mean?

Answer 1

This is probably a 47 pF 100 V capacitor.

Capacitance values on small parts like this are almost always expressed in a floating point format. In this case, most likely, the first two digits are the mantissa and the last the exponent of 10. "470" therefore means "47 x 10⁰". We guess that the units is pF, but that is almost universally the case.