BZX84-B18,235

Single Zener Diodes Overview

The Nexperia BZX84-B18,235 is a low-power voltage regulator diode housed in a TO-236AB (SOT-23) surface-mounted device plastic package. It provides a nominal working voltage of 18 V with a tolerance range of ±2 %. The device supports a total power dissipation of up to 250 mW and operates within an ambient temperature range of -55 °C to +150 °C. Key electrical characteristics include a maximum differential resistance of 225 Ω at IZ = 5 mA, a reverse current of 45 μA at VR = 18 V, and a non-repetitive peak reverse power dissipation capability of 40 W.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation within the normalized E24 series for consistent circuit performance.
• Utilizes a compact SOT-23 surface-mount package to facilitate automated assembly and space-constrained designs.
• Offers high thermal robustness with a junction temperature rating of 150 °C.

Single Zener Diodes Applications

• General voltage regulation functions
• Reference voltage generation
• Overvoltage protection circuits

Single Zener Diodes Procurement Notes

Verify that the specific part number suffix matches the required tolerance grade, as the BZX84 series includes variants with different accuracy levels. Confirm that the application environment remains within the specified operating temperature limits to ensure long-term reliability. Check for any recent revision history updates regarding automotive qualification status or packaging changes before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when a precise 18 V reference is needed in a small form factor. Ensure the circuit design accounts for the 225 Ω differential resistance to maintain stability under varying load currents. Consider the thermal resistance characteristics if the device will operate near its maximum power dissipation limit in enclosed spaces.

Single Zener Diodes Part Context

This component belongs to the BZX84 series of low-power voltage regulator diodes manufactured by Nexperia. The series encompasses 37 breakdown voltages ranging from 2.4 V to 75 V, available in three tolerance grades: ±1 %, ±2 %, and approximately ±5 %. All variants share the same TO-236AB physical footprint and general electrical architecture.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other BZX84-B18 variants from different manufacturers that meet the ±2 % tolerance specification and SOT-23 package dimensions. Verify pinout compatibility and thermal characteristics before substitution.