Clamps
Metal oxide varistor (MOV) Very fast response (,0.5 ns)
Large energy absorption
Can safely conduct large currents (from a few amperes to
many kA)
Available in a wide range of voltages (from a few volts to
hundreds of kV)
Large parasitic capacitance (in nF)
Avalanche diode Very fast response (,0.1 ns)
Good control over clamping voltage (6–200 V)
Small maximum current (,100 A)
Large parasitic capacitance (in nF)
Diode Small clamping voltage (0.7–2 V)
Small parasitic capacitance