No.

It is most likely a three way dimmer, where the two black wires would run to the other three switch, and the red wire would either run to the breaker panel or the light fixture (depending on the electrical box location).

If you're using this in a single-pole application, place a wire nut on one of the black wires, and then wire it as a single-pole device using the red wire and the remaining black wire.

And make sure you have the power turned off before attempting.