93A thermal relay rated current and thermal element rated current, 80-93A adjusting current range,manual and automatic reset, 3 pole, test button and a button. JR28-40 Series thermal relay can be used as overload protection of your long term or indirect longterm service motor. The relay has functions of phase failure protect, temperature compensation, etc. Manual and automatic reset, test button and a button that can manually bread the NC contact. Keep to cut off the electric circuit when the electric voltage is overload, easy to use and install.