These single stage surge
protectors offer a high degree of protection at a budget-minded price.
Each is a quality unit with a TVS (Transient Voltage Suppressor) for
each protected line. Models are available for Ethernet, USB and serial
circuits.
Model 485FPP has surge suppression
and fast-acting 125 mA fuses to protect against transient voltages that are too
long or too large for normal suppression. Once blown, this unit must be
replaced. For RS-422 and RS-485 circuits.