Volume II - Power

Fuses

Follow these instructions to avoid electrical shock hazard when wiring the type of fuseholder illustrated below.

1. Connect the AC Input to the Terminal on the end of the Fuse holder.
2. Connect the Terminal on the side of the Fuseholder to the AC Line Filter or AC Switch.

Subminiature microfuses are used on many Sun Printed Circuit Boards. Subminiature microfuses are field replaceable.

PICO II fuses are used on Printed Circuit Boards and Peripheral devices such as Tape and Disk Drives. PICO II fuses are not field replaceable because they are soldered in place.

Positive Temperature Coefficient (PTC) thermistors are resistors with a high positive temperature coefficient of resistance. The PTC is used as a self-resetting fuse in overload applications. When an overload current flows through a PTC, there is a specific time period before the PTC heats up to its high-resistance state and starts limiting the current. PTCs are not field replaceable because