BZX84B47-HE3-18

Single Zener Diodes Overview

The Vishay BZX84B47-HE3-18 is a silicon planar Zener diode in the BZX84 series, housed in an SOT-23 surface-mount package. It provides a nominal Zener voltage of 47 V with a tight tolerance of ±2%. The device operates at a test current of 2 mA and features a maximum reverse leakage current of 0.5 µA at 32.9 V. It supports a power dissipation of up to 500 mW and functions within a temperature range of -55 °C to +150 °C.

Single Zener Diodes Feature Summary

• High precision voltage regulation with ±2% tolerance for stable reference applications
• Automotive-grade reliability through AEC-Q101 qualification
• Robust electrostatic discharge protection exceeding 8 kV human body model standards

Single Zener Diodes Applications

• Voltage reference circuits requiring high accuracy
• Overvoltage protection in automotive electronic systems
• Clamping and switching applications in compact surface-mount designs

Single Zener Diodes Procurement Notes

Verify that the specific ordering code includes the HE3_A suffix to confirm AEC-Q101 automotive qualification. Ensure the trailing -18 indicates the correct 10,000-unit reel packaging format. Cross-reference the manufacturer datasheet document number 86338 to validate all electrical parameters against the latest revision before finalizing procurement specifications.

Single Zener Diodes Selection Notes

Select this component when strict voltage tolerance is required compared to standard commercial grades. The HE3_A designation ensures compliance with automotive quality standards. Verify that the SOT-23 footprint aligns with the PCB layout constraints and that the thermal management strategy accommodates the specified junction-to-lead thermal resistance values under expected operating conditions.

Single Zener Diodes Part Context

This part belongs to the Vishay BZX84 series of small signal Zener diodes. The series utilizes silicon planar technology and offers a wide range of standardized voltages. The BZX84B variant specifically denotes the tighter ±2% tolerance band, distinguishing it from the broader ±5% commercial grade options available within the same physical package family.

Single Zener Diodes Replacement Considerations

Substitute only with other Vishay BZX84B47 variants sharing identical electrical characteristics and package dimensions. Confirm that any alternative maintains the necessary AEC-Q101 qualification status if used in automotive contexts. Do not replace with lower-tolerance or non-qualified equivalents without revalidating circuit performance.