TVS Diodes are now in stock at Tenco. A transient-voltage-suppression (TVS) diode, also transil or thyrector, is an electronic component used to protect electronics from voltage spikes induced on connected wires.A transient-voltage-suppression diode may be either unidirectional or bidirectional. Tenco offers inventory, pricing, & datasheets for TVS diodes . To know more, please view our large section of TVS diodes below.