^Slow Make, Slow Break Contacts^Heavy Duty AC Rated Also Suitable for Low Voltage DC^Applications^Industry Standard .500 Dia Mounting Hole^20A 125277VAC, 1 1/2 HP 125VAC, 2 HP 250VAC^Insulation Resistance: 100 Megohms (min.)^Dielectric Strength: 1000V RMS (min.), 1500V (54099 only)^Temperature Rating: 32 to 185 F (0 to 85 C)