Phaser coupling
A phaser coupling was a component aboard a starship that transferred power to the phaser emitters.

In 2267, while stuck in the mirror universe, Captain Kirk ordered Montgomery Scott, both of whom were trying to return to their own reality, to disable the main phaser couplings on the , in an attempt to stop the destruction of the Halkan homeworld. ()

The systems on the  ran the plasma conduit through the primary phaser coupling almost doubled phaser power. ()

After the  was taken over by the Kazon-Nistrim in 2372, Tom Paris instructed The Doctor and Lon Suder, the only crew members still aboard, to block the discharge from Voyagers backup phaser couplings while he attacked the primary couplings from his shuttlecraft. This caused the couplings to overload when the Kazon attempted to switch to backup phaser power during Paris' attack, releasing a massive amount of energy that inflicted significant casualties aboard. ()

When the  was disabled inside a graviton ellipse in 2376, the crew attempted to reroute power from the phaser couplings. ()

Weapon components