Disassembler Warhead

Disassembler Warheads are a devastating nanotechnology-based weapon, that can be pretty much summed up as a weaponized gray goo scenario. That, thankfully, has an built-in limiters which makes them less volatile than Berserk Missile.
Ship hit by a Disassembler Warhead is essentially dead. The hyperadvanced nanites packed into the warhead will devour it whole, creating more and more of themselves. They can be stopped only by rather extreme measures - there are few cases of capital ships cauterizing the wound made by them with nuclear warheads (together with EMP pulse that burns the rest of nanites... together with ship systems).
It still suffers from the fact that it actually requires direct hit. With for example Gravity Warhead causing pretty much equal amount of damage while being able to be mass produced.