Z2SMB18

Single Zener Diodes Overview

The Z2SMB18 is a surface-mount silicon Zener diode from Diotec Semiconductor, housed in an SMB (DO-214AA) plastic case. It provides a nominal Zener voltage of 18 V with a standard tolerance of ±5%. The device supports a maximum power dissipation of 2 W at 25°C ambient temperature and up to 3 W when mounted on a PCB with large copper pads. Key electrical parameters include a test current of 25 mA, a dynamic resistance of 6 ohms, and a reverse leakage current of 1 µA at 75% of the nominal voltage. It operates within a junction temperature range of -50°C to +150°C.

Single Zener Diodes Feature Summary

• High power dissipation capability for efficient thermal management
• Standardized Zener voltage grading compliant with international E24 series
• Compliant with RoHS directives and REACH regulations

Single Zener Diodes Applications

• Voltage stabilization circuits
• Linear voltage regulators
• Reference voltage sources

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix to confirm compliance requirements. Standard versions are commercial/industrial grade. Suffixes such as -Q indicate AEC-Q101 compliance, while -AQ denotes AEC-Q101 qualification. Confirm package dimensions and tape-and-reel specifications match assembly equipment capabilities before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust voltage regulation in compact surface-mount designs. Ensure the circuit design accounts for the 2 W power rating at standard ambient temperatures or the increased 3 W rating with adequate copper pad area. Verify that the required Zener voltage falls within the available E24 series options provided by the manufacturer.

Single Zener Diodes Part Context

This part belongs to the Z2SMB series of surface-mount Zener diodes manufactured by Diotec Semiconductor. The series covers a wide voltage range from 6.8 V to 200 V in the same SMB package. These devices utilize non-planar technology and are designed for general-purpose voltage regulation tasks in commercial and industrial electronic equipment.

Single Zener Diodes Replacement Considerations

Cross-reference with other SMB package Zener diodes offering 18 V nominal voltage and similar power ratings. Ensure compatibility regarding dynamic resistance, leakage current, and thermal characteristics. Verify that any substitute meets the same mechanical and environmental standards.