Littelfuse LFT600603C - LFTThe new Littelfuse Class T fuse blocks offer many advantages 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