Thursday, July 18, 2024

Two-in-One Varistor For CAN Systems

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The varistors offer 25 kV ESD voltage resistance, complying with the AEC-Q200 automotive standard, ensuring enhanced safety in advanced driver assistance systems.


TDK Corporation has added two new varistors to its AVRH series for automotive use, known for their electrostatic discharge (ESD) voltage resistance. This feature is crucial for advanced driver assistance systems (ADAS) safety.

The new additions to the AVRH series comply with the AEC-Q200 automotive standard and meet a 25 kV voltage resistance requirement in ESD tests. They operate within a -55 °C to +150 °C temperature range and have a compact footprint, aligning with the trend of miniaturization in automotive manufacturing. 

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As automotive OEMs enhance and expand ADAS features such as lane departure warnings, collision avoidance, and adaptive cruise control, the proportion of electronics in the overall BOM (bill of materials) for automobiles is rising. This trend is consistent across electric vehicles (EVs), hybrids, and traditional gasoline-powered vehicles. Additionally, auto manufacturers are advancing autonomous driving technologies, necessitating the integration of even more sophisticated electronics. The electronic control units (ECUs) responsible for managing these new electronic subsystems are particularly vulnerable to damage from ESD. The issue is that even momentary disruptions in the safety-critical functions of ADAS and autonomous driving systems are unacceptable, and the risk of such disruptions increases as more electronics are incorporated into each vehicle.

The AVRH16A2C270KT200NA8 features a 2-in-1 array structure, allowing a single chip to function as two varistors. It is designed with a specification that minimizes the capacitance difference between channels to less than 1.0 pF.

Some of the key features of the two-in-one varistor include:

  • Outer dimensions [mm]: 1.6 x 0.8 x 0.6
  • Maximum allowable circuit voltage [V]: 19
  • Capacitance [pF]: 20
  • Capacitance Difference [dB]: 1.0 Max

TDK Corporation, based in Tokyo, Japan, is a leader in electronic solutions for smart society. The company commercialized ferrite, a key material for electronic and magnetic products.

For more information, click here.

Nidhi Agarwal
Nidhi Agarwal
Nidhi Agarwal is a journalist at EFY. She is an Electronics and Communication Engineer with over five years of academic experience. Her expertise lies in working with development boards and IoT cloud. She enjoys writing as it enables her to share her knowledge and insights related to electronics, with like-minded techies.


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