FP0030 Datasheet, PDF (1/5 Pages) Supertex, Inc – Low Voltage Protection Switch

Supertex inc.
Low Voltage
Protection Switch
FP0030
Features
►► Up to ±20V input voltage protection
►► Low on-resistance - 6.5Ω typical
►► Fast switching speed
►► Effectively, a simple two terminal device
►► No external power supplies needed
Applications
►► Ethernet system protection
►► Resettable fuse
►► High side switch
►► Data acquisition
General Description
The Supertex FP0030 is a 20V current limiting protection
device. It is designed to protect Ethernet systems from high
transient voltages.
The FP0030 can be considered as a normally closed switch
with a typical switch resistance of 6.5Ω. The device starts
to turn off when the voltage drop across the two terminals
exceeds a nominal value of ±1.5V. In the off state, the FP0030
can withstand up to ±20V across its terminals. A small amount
of current, typical 800µA is allowed to flow through the device.
The FP0030 can also be used as a resettable fuse to protect
power lines against output short circuit conditions.
The FP0030 is available in a 3-Lead SOT-23 package.
Typical Application Circuit
3.3V
3.3V
FP0030
3.3V
3.3V
Ethernet
Port
FP0030
Data
Line 1
Data
Line 2
Doc.# DSFP-FP0030
A072312
Supertex inc.
www.supertex.com