What is this component: 48-27SD50020222?
The comments are correct. That is an IR receiver. It can be used for decoding IR signals from IR transmitters, such as a typical TV remote. And if I'm correct, if it is paired with an IR transmitter, it can be used for short-range distance detection.
You can buy them from any standard online electronics store:
sparkfun.com
digikey.com
adafruit.com