BZX84C3V9-HE3_A-18

Single Zener Diodes Overview

The BZX84C3V9-HE3_A-18 is a silicon planar Zener diode from Vishay Semiconductors, housed in an SOT-23 package. It provides a nominal Zener voltage of 3.9 V with a standard tolerance of ±5%. The device operates at a test current of 5 mA and features a maximum reverse leakage current of 3 μA at 1 V. Electrical characteristics include a dynamic resistance of 90 Ω at the test current and a temperature coefficient ranging from -7 to -3 × 10⁻⁴/°C. It is qualified under AEC-Q101 standards for automotive applications.

Single Zener Diodes Feature Summary

• AEC-Q101 qualified for automotive reliability requirements
• Silicon planar construction for stable voltage regulation
• ESD protection capability exceeding 8 kV via human body model

Single Zener Diodes Applications

• Automotive electronic circuit voltage regulation
• General-purpose voltage reference circuits
• Overvoltage protection in low-voltage signal lines

Single Zener Diodes Procurement Notes

Verify that the ordering code matches the specific suffixes for AEC-Q101 qualification and reel packaging. Confirm RoHS compliance status as indicated by the HE3 designation. Ensure the procurement specifications align with the required voltage tolerance and thermal operating ranges defined in the official datasheet.

Single Zener Diodes Selection Notes

Select this component when a precise 3.9 V reference is needed within a compact surface-mount footprint. The HE3 suffix indicates automotive-grade qualification, making it suitable for harsh environments. Consider the negative temperature coefficient for designs requiring thermal compensation or stability analysis across the specified operating temperature range.

Single Zener Diodes Part Context

This part belongs to the BZX84 series of small signal Zener diodes manufactured by Vishay General Semiconductor - Diodes Division. The series utilizes silicon planar technology and offers a wide range of standardized Zener voltages. The BZX84C3V9 variant specifically targets the 3.9 V segment with standard commercial tolerances enhanced by automotive qualification.

Single Zener Diodes Replacement Considerations

BZX84C3V9-E3-18

Single Zener Diodes FAQ

What is the ESD protection rating for this component?

The device meets AEC-Q101 ESD capability standards, offering protection greater than 8 kV according to the human body model and greater than 800 V according to the machine model.

How does the 'HE3_A' suffix affect the component's function?

The suffix indicates that the device is RoHS-compliant and qualified to the AEC-Q101 automotive standard, distinguishing it from commercial grade variants while maintaining the same electrical parameters.