Let's look at the name, 'Trans' means between and 'Phasic' refers to being in phase with normal matter, thus it's clear this weapon is designed to phase between to enable it to pass though shielding and hull. This weapon is meant to be an anti-Borg weapon. It enlists the casing and basic internal systems of a Hellfire torpedo but it's warhead and phasing systems have undergone major changes. Current Hellfire torpedoes, developed three years ago, have the ability to 'skip' past a target's shields and impact against the hull causing much more damage then a torpedo hitting shields. The Transphasic Torpedo goes a step further. Improving on the Hellfire's phasing systems, improved in the 3 years since it was design, it not only phases to 'skip' past shielding, but also past the target's hull and detonating inside the target for maximum damage. However, to include new systems and a larger warhead, range has been limited, even over the Hellfire's short range. Also due to the weapon's highly volatile nature and intentions (used against extreme hostile forces, like the Borg), only a few are carried on ships, based on sizes.

Range Limit: 10 km - 3 000 500 km (from starships at warp)
Warp Speed: 110% of warp factor of firing ship
Sublight Speed: up to a 50% higher velocity (maximum velocity = initial velocity + .50 × initial velocity/ c {or Vmax = Vi + .50 Vi/c}
Shield Scan Range: 4 m
Developed: 2377
Operational Since: 2377
Yield: 525 isotons
Warhead: Protomatter/Tecasite/Trilitheum reaction that's ignighted by and reacted upon by antiprotons