Features/Benefits Short-circuit protected Overload protected Optical Isolation Low off-state leakage Compact 6-pin DIP package Description ZD20CF Series Relays have optical isolation between relay input and output. Loads may be connected to either the positive or negative output terminals. ZD20CF Relays act as electronic circuit breakers that sense shorted loads or other overload events and then trip-off. Relay contacts open and no current flows through the relay and associated loads. These relays prevent over-current damage to the system. Cycling the relay on-off removes the tripped or latched-off condition and returns the relay to the normal operating state.