A projected stasis field, also referred to as a stasis weapon, was an experimentalKlingon weapon of immense power, capable of completely paralyzing an enemy vessel, including all vital systems. The weapon was first field tested against the Federation in 2269, aboard the IKS Gr'oth.
During the confrontation, the Gr'oth successfully disabled the Enterprise, but upon further analysis by Science OfficerSpock, it was determined that after prolonged use of the weapon, the cruiser's power cells were too quickly drained, proving to equally crippling to itself. In order to complete any prolonged assault, the cruiser was required to wait several hours for the weapon to recharge to full power.
While the weapon was referred to as a "stasis weapon," it did not truly place the target in stasis, as the crew of the affected ship was still able to act. It did, however, disable all weapon systems and engines. In the episode, it was able to fire at up to at least three simultaneous targets.
In Stephen Cole's Trek-based board game Star Fleet Battles, the Klingon stasis field comes into more general use, but is still quite limited in deployment, as the ship using the "Stasis Field Generator" requires other ships as escorts in order to be effective.