Allen-Bradley 1492-SPM3B500 Supplementary Protector, 480Y/277 VAC, 50 A, 5 kA, 3 Poles, B-Curve/Thermal Magnetic Trip

1492 SPM supplementary protectors are used to protect equipment in applications. They are current limiting and feature dual terminals for wiring and bus bar flexibility. With a 40 deg C (104 deg F) calibration temperature, these protectors are suitable for extreme ambient conditions.