Opposite phase detecting device for alternating current electric

OR-diode inductive load spike suppressor

Out-of-step relay

Output protection for arc discharge lamp ballast

Output stage for an ac voltage switch

Over-current protection device for a switched-mode power supply

Over-voltage protected semiconductor device

Overcurrent detecting device

Overcurrent protection circuit and semiconductor apparatus

Overcurrent protection circuit for power transistor

Overcurrent protection device

Overcurrent protection device

Overcurrent protection relay with communications

Overcurrent protective circuit for modulated-conductivity type M

Overload protection circuit for a semiconductor switch

Overvoltage directional relay

Overvoltage protection circuit