Varistor butere ụzọ

1. Ngwa:
transistor, diode, IC, thyristor na ikpe, semi conductor switeh elecment na ụdị nke electronic equipuent nchebe
Mmụba nke ukwuu n'ime ngwa eji ejide ụlọ, elektrọnik ụlọ ọrụ, relay na electro magnetik valva.
Electrostaitc mwepu mkpọtu mkpọda
Mgbanwe n'elu-voltaji nchedo ntapu-nchekwa
Thunderbolt na n'elu-voltaji nchebe na dị otú ahụ telekomunikashions ngwa dị ka ekwentị, miles-control Exchanger na na.

2.Njirimara na njirimara teknụzụ