BZT52B56-HE3_A-18

Single Zener Diodes Overview

The BZT52B56-HE3_A-18 is a silicon planar Zener diode from Vishay, housed in an SOD-123 surface-mount package. It provides a nominal Zener voltage of 56 V with a tight tolerance of ±2%. The device is AEC-Q101 qualified for automotive applications and operates within a junction temperature range of -55 °C to +150 °C. Maximum power dissipation is rated at 500 mW, with a dynamic impedance of 135 Ω measured at a test current of 2 mA.

Single Zener Diodes Feature Summary

• AEC-Q101 qualified for automotive reliability standards
• High precision voltage grading with ±2% tolerance
• ESD protection exceeding 8 kV (HBM) and 800 V (MM)
• RoHS-compliant HE3_A lead-free construction

Single Zener Diodes Applications

• Automotive circuit voltage regulation
• Precision reference voltage generation
• Overvoltage protection circuits

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the tape-and-reel quantity and packaging format. Ensure that the component meets the required AEC-Q101 qualification status if utilized in automotive environments. Cross-reference the exact part number with the latest datasheet revision to validate current availability and compliance specifications before finalizing procurement orders.

Single Zener Diodes Selection Notes

Select this component when precise voltage regulation is critical due to its narrow ±2% tolerance band. The AEC-Q101 qualification makes it suitable for demanding automotive environments requiring high reliability. Verify that the SOD-123 package dimensions align with the target PCB footprint and that the thermal management strategy supports the specified maximum power dissipation limits under expected operating conditions.

Single Zener Diodes Part Context

This component belongs to the Vishay BZT52 series of small signal Zener diodes. The series offers a wide range of graded voltages from 2.2 V to 75 V according to the E24 standard. The BZT52B variant specifically denotes the tighter ±2% tolerance option, while the HE3_A suffix indicates RoHS compliance and automotive qualification. These devices are designed for general-purpose voltage regulation and protection tasks.

Single Zener Diodes Replacement Considerations

Substitute only with components explicitly listed as approved replacements by Vishay General Semiconductor. Verify that any alternative maintains identical electrical characteristics, including the 56 V nominal voltage, ±2% tolerance, and AEC-Q101 qualification status.