DL4746A-TP

Single Zener Diodes Overview

The DL4746A-TP is a 18 V Zener diode manufactured by Micro Commercial Components in the DO-214AC (SMA) MELF package. It features a nominal voltage tolerance of ±5% and a maximum DC power dissipation of 1 W. The device operates within a temperature range of -65 °C to +175 °C, with a maximum thermal resistance of 100 K/W from junction to ambient. Electrical characteristics include a test current of 14 mA, a maximum dynamic impedance of 20 Ω at the test current, and a maximum reverse current of 5 μA at a test voltage of 13.7 V.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF construction for high reliability
• Very sharp reverse characteristic ensuring stable breakdown performance
• Low reverse current level for efficient regulation

Single Zener Diodes Applications

• Voltage reference circuits requiring stable regulation
• Overvoltage protection in electronic systems
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify authenticity through authorized MCC distributors or direct procurement channels to avoid counterfeit components. Confirm RoHS compliance status via the 'P' suffix designation if applicable. Ensure storage conditions align with moisture sensitivity level 1 requirements. Validate part markings against official datasheet specifications before integration into production lines.

Single Zener Diodes Selection Notes

Select this component when an 18 V regulation point is required in surface-mount designs. The SMA MELF package offers compact footprint advantages over axial leads. Consider the 1 W power rating and thermal resistance limits for heat dissipation needs. Verify that the ±5% voltage tolerance meets circuit precision requirements compared to tighter tolerance alternatives.

Single Zener Diodes Part Context

This component belongs to the DL4728 through DL4761 series of 1 Watt Zener diodes produced by Micro Commercial Components. The series spans voltages from 3.3 V to 75 V, utilizing a consistent hermetic glass package design. The DL4746 variant specifically targets the 18 V segment of this broad regulatory portfolio.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering 18 V Zener diodes in the SMA (DO-214AC) package. Verify matching electrical parameters such as dynamic impedance, reverse leakage, and power dissipation capabilities before substitution.