This Cr123C Series thermal overload heater element is known for its reliability, with amp ratings from 1.39 to 1.63 amps. The maximum fuse rating is 4. The open and enclosed versions have amp ratings ranging from 1.42 to 1.66 amps and 1.40 to 1.65 amps, respectively. It's suitable for NEMA Size 00, 0, and 1, with amp ratings from 1.45 to 1.69. This element is designed for use with thermal overload relays, magnetic motor starters, and motor controls.