AZ23C56-E3-18

Overview

The Vishay AZ23C56-E3-18 is a dual common anode silicon planar Zener diode array housed in an SOT-23 surface-mount package. It provides two independent voltage regulation channels with a nominal Zener voltage of 56 V and a tolerance of ±5%. The device operates within a junction temperature range of -55 °C to +150 °C and dissipates up to 300 mW on a standard FR-4 board. Electrical characteristics include a maximum reverse leakage current of 50 µA at 42 V, a dynamic resistance of 135 Ω at the test current of 2 mA, and a temperature coefficient ranging from 9 to 11 x 10⁻⁴/°C.

Feature Summary

• Dual common anode configuration for space-efficient circuit design
• ESD protection capability exceeding 8 kV via human body model
• RoHS-compliant commercial grade construction

Applications

• Voltage reference circuits requiring dual regulated rails
• Overvoltage protection for sensitive input lines
• Clamping applications in signal conditioning paths

Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm reel size and tape specifications. Confirm that the component meets RoHS compliance requirements for your assembly process. Ensure the selected variant matches the required voltage tolerance and thermal performance parameters for the target application environment.

Selection Notes

Select this component when a dual-channel voltage regulation solution is required in a compact footprint. Consider the 5% voltage tolerance and the specific dynamic resistance values when designing precision reference circuits. Evaluate the thermal dissipation capabilities relative to the ambient operating conditions and PCB copper area available for heat spreading.

Part Context

This part belongs to the Vishay AZ23 series of small signal Zener diodes. The series offers a wide range of standardized voltage options graded according to the E24 standard. The 'C' designation indicates a standard 5% voltage tolerance, while the '-E3-18' suffix specifies the lead-free (RoHS) compliant packaging format on a 13-inch reel.

Replacement Considerations

AZ23C56-E3-08

FAQ

What is the marking code for the AZ23C56-E3-18?

The marking code for this device is D73.

How does the power dissipation rating change based on mounting?

The device dissipates 500 mW when mounted directly to leads, but the rating drops to 300 mW when mounted on an FR-4 board using the recommended soldering footprint.

Is this component qualified for automotive applications?

No, the base P/N-E3 version is commercial grade. Automotive qualification requires the HE3_A suffix indicating AEC-Q101 qualification.