It is defined as the MLV internal circulation of 1mA/cm2 current value of the applied voltage. For the Zinc oxide varistors, the breakdown voltage is related to the microstructure grain size, not change due to the volume and variety of the composition of the device.
It’s called Nonlinear Exponent to adjust MLV characteristic parameter. This value is related to the MLV construction and also the composition variety. It could use the calculation formula to check out.
α = log ( I1 / I2 ) / log ( V1 / V2 )
Under normal working status of the device, there is only a few μA micro-currents flowing through the device generally. Under normal working status refers to a device in the normal operating voltage (Working Voltage), that is, the device is in a State of pre-breakdown, the resistance values is high can be seen as an insulator, and only a tiny current flows General is using breakdown voltage 80% make the test.
Max Clamping Voltage:
Maximum peak voltage across the MLV measure at a specified pulse current and waveform.
Max Peak Current:
MLV major function is absorb the overvoltage current, so the peak current of MLV is the major characteristic. Also this test will affect the product lifetime and the largest surge current with surge width into anti. General test method is 8/20μS and 10/1000μS.
Max Energy Absorption:
When the surge hit, MLV breakdown when it is working, there would be a large current flows through the body, energy is absorbed by MLV. MLV absorb energy has its limits. Its test methods such as surge tolerance, standard surge current test, using the formula conversion.