Plasma bomb

A plasma bomb was a weapon that saw use in both the Beta Quadrant and the Delta Quadrant. It was used by the against the Vaadwaur. 

It was introduced in the Federation (and presumably the Romulan Star Empire) by 2410, by which time plasma bombs were used most notably by Powerleveling Squadron. Plasma bomb varieties were rated by their mass: 250 kg, 500 kg, 1,000 kg being the most common varieties. fighters could carry twelve 500-kg plasma bombs.