Toshiba Surge-Protection Zener Diodes

Toshiba has launched and expanded its lineup of surge-protection Zener diodes, “XCEZ series,” for automotive equipment. These diodes feature small and versatile SOD-523 package, making them suitable for use in automotive systems such as advanced driver-assistance systems (ADAS) and battery management systems (BMS).

Recently, as automotive equipment has become increasingly electrified, there has been a growing demand for measures to prevent malfunctions caused by noise, such as electrostatic discharge (ESD) in nanosecond range and switching surges in the microsecond to millisecond range. The XCEZ series products suppress system malfunctions caused by such noise, which can penetrate power supply lines and connectors of various automotive ECUs (Electronic Control Unit). The new products contribute to the protection of devices and circuits by absorbing external noise and surges.

To support high-density mounting, the XCEZ series adopts an industry-standard, general-purpose SOD-523 package (1.6×0.8mm), which reduces the mounting area by approximately 59% compared to SOD-323 package (2.5×1.25mm) of Toshiba’s existing XCUZ series.
Similar to the XCUZ series, the XCEZ series also uses Toshiba's proprietary Zener process to achieve lower dynamic resistance. One of the products in this series, the XCEZ5V6, features a low dynamic resistance of 0.16Ω (typ.), providing effective absorption of surge voltage that helps prevent system damage and malfunction, thereby contributing to the protection of devices and circuits.

The XCEZ series, similar to the XCUZ series, offers a lineup of 20 products with standard Zener voltages ranging from 5.6V to 36V, suitable for major power supply lines. It also complies with AEC-Q101, the reliability testing standard for automotive electronic components.

Toshiba will continue to expand its lineup of surge-protection Zener diodes for automotive equipment and contribute to enhancing the performance and reliability of automotive systems.

Features

• Low dynamic resistance.
• Surge protection for long pulse durations in the millisecond range.
• AEC-Q101 qualified.
• Small, highly compatible general-purpose package.

Application

Automotive equipment: Advance Driver Assistance Systems (ADAS), In-Vehicle Infotainment (IVI), Battery Management System (BMS), etc

Key Components 

Part names of recently adding products: XCEZ5V6, XCEZ6V2, XCEZ6V8, XCEZ7V5, XCEZ8V2, XCEZ9V1, XCEZ10V, XCEZ11V, XCEZ12V, XCEZ13V, XCEZ15V, XCEZ16V, XCEZ18V, XCEZ20V, XCEZ22V, XCEZ24V, XCEZ27V, XCEZ30V, XCEZ33V, XCEZ36V

Block Diagram