PZU18DB2,115

Overview

The PZU18DB2,115 is a dual isolated general-purpose Zener diode from the PZUXDB2 series, manufactured by Nexperia. It is housed in a SOT353 (SC-88A) surface-mounted package with five leads. The device features two independent Zener diodes within a single compact plastic housing. Key electrical parameters include a nominal working voltage of 18 V with a tolerance of approximately ±2%. The total power dissipation is rated at 250 mW, while each individual diode supports a non-repetitive peak reverse power dissipation of 40 W. The component is qualified to AEC-Q101 standards for automotive applications.

Feature Summary

• Dual isolated diode configuration allowing independent operation of two Zener elements within one package.
• Small standard plastic and dark-green halogen-free package suitable for high-density surface-mounted design.
• AEC-Q101 qualification ensuring suitability for demanding automotive electronic environments.

Applications

• General regulation functions
• Voltage reference circuits
• Over-voltage protection

Procurement Notes

Verify the specific ordering suffix against current Nexperia documentation to confirm packaging details and manufacturing origin. Ensure compatibility with the SOT353 footprint during PCB layout. Confirm that the selected variant meets the required thermal and electrical specifications for the intended operating environment before finalizing procurement.

Selection Notes

Select this component when space-constrained designs require dual voltage regulation or clamping capabilities. The SOT353 package offers a small form factor ideal for portable electronics. Consider the ±2% voltage tolerance and the specific temperature coefficient characteristics for precision requirements. Verify that the 250 mW total power dissipation rating accommodates the expected thermal load in the application.

Part Context

This part belongs to the PZUXDB2 series of dual Zener diodes offered by Nexperia. The series provides various nominal working voltages ranging from 2.7 V to 24 V, all sharing the same SOT353 package outline. The 'B2' designation indicates the specific voltage tolerance class of approximately ±2%, distinguishing it from other tolerance variants within the broader product family.

Replacement Considerations

Direct replacements must match the SOT353 pinout and dual isolated configuration. Verify that any substitute component meets or exceeds the 250 mW power dissipation and 150 °C junction temperature limits. Check for equivalent AEC-Q101 qualification if automotive reliability is required.