600V CLASS T BLOCK 30A 3 POLE P PLATE. The new Littelfuse Class T fuse blocks offer manyadvantages over previous generations that are noted in the features and benefits section. Of particular value is the space savings these new blocks provide. Features/Benefits: Compact design means increased space savings. DIN Rail releasable for all 30 A-60 A fuse blocks. Only one hand is required to release from DIN Rail (lock open lock closed). Molded phenolic base. Steel reinforcing springs supplied as standard in order to provide low resistance connection and long-range reliability. Larger blocks employ integral heat sink for maximum heat dissipation. Universal mounting holes make for easy replacement.