Switch keeps Ethernet systems safe from transient voltages

Supertex Inc. has rolled out the FP0030Vage protection switch. A 20V current limiting protection device, the FP0030 is like a normally closed switch with a typical resistance of 4.5Ω. When the voltage drop across its two terminals exceeds a nominal value of ±1.5V, the IC starts to turn off. In that state, the FP0030 can take up to ±20V across its terminals and let up to 700?A typical current flow through it.

The FP0030 may also be used as a resettable fuse to protect power lines against output short circuit conditions. Its fast switching speed protect the system against abrupt over current conditions.

The RoHS-compliant FP0030 is available in a three lead SOT-23 package (FP0030K1-G), priced at $0.38 each in 1K quantities. Samples are available from stock. Lead-time for production quantities is 4-6 weeks ARO.