Toshiba Zener Diode Silicon Epitaxial Planar XCEZ Series For Overvoltage Protection Of ECU For Automotive - XCEZ22V

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.

Small, highly compatible general-purpose package

In the XCEZ series, Toshiba has adopted the highly compatible and small SOD-523 package (1.6×0.8mm), which reduces the mounting area by approximately 59% compared to the SOD-323 package (2.5×1.25mm) used in Toshiba’s existing XCUZ series. This contributes to the miniaturization of circuit boards.

Low dynamic resistance

As a protective device, dynamic resistance is an important factor in absorbing surge voltages that enter from power lines, connectors, etc. A low dynamic resistance allows surge current to flow more easily to the Zener diode. Toshiba's proprietary Zener process provides a steep slope in I_TLP-V_TLP curve at the reverse-voltage (V_R) end, achieving a lower dynamic resistance. This enables high absorption of surge voltage to prevent damage and malfunction of the system and enhances protection of devices and circuits. 

Surge protection for long pulse durations in the millisecond range.

The new products achieve a high maximum allowable Zener surge power of 6W with a 10ms pulse width, enabling protection of semiconductor devices against long pulse width conditions in the millisecond range, such as high switching surges and overvoltages close to DC.

Absolute Maximum Ratings