Brand: Gladiator Item: Terminal block IP Rating: IP20 Mounting: DIN rail or panel Number of Poles: 1 Amperage Rating: 510A Terminal Block Type: Enclosed UL Rating: UL 1059 recognized SCCR Rating: 100kA SCCR Modular: Yes Finger-safe: Yes Line Side Openings: 2 openings accept 250 kcmil to 4 AWG Load Side Openings: 2 openings accept 250 kcmil to 4 AWG Gladiator enclosed terminal block, finger-safe, 510A, 1-pole, line side: 2 openings accept 250 kcmil to 4 AWG, load side: 2 openings accept 250 kcmil to 4 AWG, DIN rail or panel mount, UL 1059 recognized.