Comparison : Item # SHT22NJ, UL489 Shunt Trip M2HV 100-130 Vac
Item # SHT22NK, UL489 Shunt Trip M2HV 220-240 Vac
Item # SHT22NL, UL489 Shunt Trip M2HV 380-440 Vac
Item # SHT22NM, UL489 Shunt Trip M2HV 480-500 Vac
Item # SHT22NP, UL489 Shunt Trip M2HV 24 Vdc