Myrtle Beach, Fla. AVX Corp.'s new series of multi-layer varistors (MLVs) are designed for electrostatic discharge (ESD) protection requirements in automotive applications. Designated the CANBus series varistor, the new surface-mount device can offer a significant space savings by replacing three components two back-to-back zener diodes and an EMC capacitor in parallel typically used to protect against transient voltage spikes.
Automotive systems applications include port protection of CAN network I/Cs, sensors and modules, LCD screens and remote keyless entry systems for both the transmitter and receiver.
The CANBus varistors are part of AVX's TransGuard line of transient voltage suppression devices. These devices are based on the company's multi-layer varistor technology, providing bi-directional ESD protection, EMI attenuation and sub-nanosecond response time.
The CANBus varistors offer significant advantages for automotive systems designers in a typical CAN network, said the company, including their ability to handle high in-rush (peak) current of 4 A 8 x 20 microseconds (μs) and a FIT rate of ≤0.1 failures (per billion hours). They feature transient energy ratings of 0.015 joules (10/1000 μs) and a working voltage range of up to 18 V and a capacitance value of 22 pF at 1 MHz.
These varistors are suitable for use in all high- and low-speed communication bus structures including LIN, CAN and J1850. They are available in single, dual and quad-configured packages.
Available in 0603 size discrete chips, 0405 two-element arrays and 0612 four-element arrays, pricing for the CANBus MLVs starts at $0.055 each for a single element. Delivery is from stock to eight weeks.
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