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Available Now! 
Available Now!MDI Mercury Relays
330NO-220A
Mercury Relay, 3 Pole, 30 Amp (30A), NO, 208/240V, Nylon Strap Around Poles
$104.69$104.69 -
MDI Mercury Relays
330NO-220AU
Mercury Relay, 3 Pole, 30 Amp (30A), NO, 208/240V, Universal Mounting Plate
$116.72$116.72 -
Available Now! 
Available Now!MDI Mercury Relays
100NC-120A-6A
Mercury Relay, 1 Pole, High Voltage Contactor, 10A @ 3500V, 15A @ 2500V, 120V Coil, Nylon Strap Around Poles
$136.53$136.53 -
Available Now! 
Available Now!MDI Mercury Relays
230NO-120A
Mercury Relay, 2 Pole, 30 Amp (30A), NO, 120VAC, Nylon Strap Around Poles
$61.80$61.80 -
Available Now! 
Available Now!MDI Mercury Relays
60NO-24D
Mercury Relay, 1 Pole, 60 Amp (60A), NO, 24VDC, Nylon Strap Around Poles
$62.50$62.50 -
Available Now! 
Available Now!MDI Mercury Relays
100NO-120A
Mercury Relay, 1 Pole, 100 Amp (100A), NO, 120VAC, Nylon Strap Around Poles
$131.80$131.80 -
MDI Mercury Relays
2100NO-24D
Mercury Relay, 2 Pole, 100 Amp (100A), NO, 24VDC, Metal Strap Around Poles
$258.67$258.67 -
MDI Mercury Relays
100NO-24D
Mercury Relay, 1 Pole, 100 Amp (100A), NO, 24VDC, Nylon Strap Around Poles
$131.80$131.80 -
MDI Mercury Relays
30NO-24D
Mercury Relay, 1 Pole, 30 Amp (30A), NO, 24VDC, Nylon Strap Around Poles
$34.77$34.77 -
MDI Mercury Relays
35NO-120ATH
Mercury Relay, 1 Pole, 35 Amp (35A), NO, 120VAC, Inductive/Lighting Loads, Nylon Strap Around Poles
$42.03$42.03 -
MDI Mercury Relays
2100NO-120A
Mercury Relay, 2 Pole, 100 Amp (100A), NO, 120VAC, Metal Strap Around Poles
$266.41$266.41 -
Available Now! 
Available Now!MDI Mercury Relays
335NO-220A-18
Mercury Relay, 3 Pole, 35 Amp (35A), NO, 208/240V, Steel Strap Around Poles
$149.53$149.53
Mercury relays, or mercury contactors, can handle high currents and frequent switching cycles plus they often last for decades with little to no maintenance.
Due to containing mercury, they are often replaced by solid state relays.