Raleigh, N.C. Stackpole Electronics, Inc. has released the ZVY and AVY series of multilayer low-voltage and automotive varistors that are now capable of operating at temperatures up to 150°C. Previously all multilayer varistors were limited to operating at temperatures below 85 degrees C, said Stackpole.
Multilayer varistors provide protection from transient voltage surges and their associated energy and current in a response time typically less than a nanosecond. They are bi-directional devices that automatically reset themselves once the transient has passed, unlike fuses which operate in response to excessive current and don't typically reset themselves.
The ZVY series is available in surface-mount or through-hole versions. SMD devices are available in 0603 to 1206 case sizes, and leaded devices range from 5-mm to 20-mm in size. DC operating voltages range from 3 to 125 volts and the ZVY is capable of handling up to 7.4 Joules standard.
The AVY series is also available in surface-mount and through-hole versions in a wide variety of sizes for each. They are specifically designed for 12-volt, 24-volt, and 42-volt automotive systems and are characterized for high maximum energy handling and high load dump energy.
Product information: varistors
Stackpole Electronics, Inc., 1-919-850-9500, www.seielect.com