_:nb339d999021048f2b5915c890c6737bcxb3
<http://schema.org/reviewBody>
"Used to control the 5V actuation(?) side of a relay, with a 3V3 source from an IC on the Base. Worked an absolute treat. Very pleased."
<https://proto-pic.co.uk/product/transistor-npn-2n3904-common-bjt-to-92>