AZ23B51-HE3_A-08

Overview

The AZ23B51-HE3_A-08 is a silicon planar Zener diode from the AZ23 series, manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 51 V with a tight tolerance of ±2%. The device operates in a common anode configuration and is housed in a SOT-23 surface-mount package. It is AEC-Q101 qualified for automotive applications and RoHS compliant. Key electrical parameters include a maximum reverse leakage current of 50 μA at 38 V, a dynamic resistance (ZZ) of 100 Ω at a test current of 2 mA, and a temperature coefficient ranging from 9 to 11 x 10⁻⁴/°C.

Feature Summary

• AEC-Q101 qualified for automotive reliability standards
• Tight voltage tolerance of ±2% for precision regulation
• ESD protection exceeding 8 kV via human body model

Applications

• Automotive voltage reference circuits
• Precision voltage regulation modules
• Over-voltage protection stages

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm tape-and-reel specifications and packaging dimensions. Ensure that the component meets the required AEC-Q101 qualification status for the intended application environment. Cross-reference the datasheet revision date to validate the accuracy of the provided electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when a precise 51 V reference with ±2% tolerance is required in a compact SOT-23 footprint. The AEC-Q101 qualification makes it suitable for automotive environments where high ESD immunity and strict voltage stability are critical design constraints. Consider the thermal resistance values when designing PCB layouts to ensure safe power dissipation limits are maintained under operating conditions.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes offered by Vishay Semiconductors. The series provides a wide range of standard Zener voltages graded according to the international E24 standard. The 'HE3_A' suffix indicates that the device is RoHS compliant and specifically qualified to the AEC-Q101 automotive standard, distinguishing it from commercial grade variants within the same family.

Replacement Considerations

AZ23B51-E3-08

FAQ

What is the dynamic resistance of the AZ23B51-HE3_A-08?

The dynamic resistance (ZZ) is specified as a maximum of 100 Ω when tested at a current of 2 mA.

Is the AZ23B51-HE3_A-08 suitable for automotive applications?

Yes, the HE3_A suffix indicates that the device is AEC-Q101 qualified, making it suitable for automotive use.

What is the maximum reverse leakage current for this device?

The maximum reverse leakage current is 50 μA, measured at a reverse voltage of 38 V.