KDZTR9.1B

Single Zener Diodes Overview

The KDZTR9.1B is a Zener diode manufactured by ROHM Semiconductor, designed for surface-mount applications in automotive-grade environments compliant with AEC-Q101 standards. It features a single configuration within an SOD-123FL (JEITA SC-109B) package, measuring 3.5x1.6 mm with a thickness of 0.9 mm. The device provides a nominal Zener voltage of 9.1 V, operating at a test current of 40 mA. It supports a maximum power dissipation of 1000 mW and operates within a junction temperature range up to 150 °C, suitable for stable constant voltage control in compact power modules.

Single Zener Diodes Feature Summary

• AEC-Q101 qualified for automotive reliability
• High power dissipation capability of 1000 mW
• Compact SMD form factor for space-constrained designs

Single Zener Diodes Applications

• Automotive circuit constant voltage control
• Compact power module voltage regulation
• Surface-mount electronic assemblies requiring high thermal stability

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against official documentation, as variations such as 'KDZVTF' or 'KDZVTR' may indicate different packaging quantities or grades. Confirm that the required component matches the standard automotive grade specifications rather than alternative non-automotive variants. Ensure compatibility with the specified SOD-123FL footprint during procurement planning.

Single Zener Diodes Selection Notes

Select this component when a 9.1 V reference is required in a high-power density surface-mount package. The 1000 mW dissipation rating distinguishes it from lower-power alternatives like the VDZFH series. Verify that the 40 mA test current aligns with the target circuit design requirements before finalizing the selection.

Single Zener Diodes Part Context

This part belongs to ROHM's KDZV series of Zener diodes, which are engineered for robust performance in demanding environments. The series emphasizes high power handling relative to its small physical size, making it a preferred choice for modern automotive electronics where space efficiency and thermal resilience are critical design constraints.

Single Zener Diodes Replacement Considerations

The EDZVFH9.1B is listed as a similar specification replacement but utilizes an EMD2 (SOD-523) package. Designers must account for the dimensional differences between the SOD-123FL and SOD-523 footprints when substituting.