DL4742A-TP

Single Zener Diodes Overview

The DL4742A-TP is a 1W Zener diode from the DL4728-DL4761 series by Micro Commercial Components. It features a nominal Zener voltage of 12V with a 5% tolerance, tested at 21mA. The device operates in an LL-41 glass MELF package (SMD/SMT). Key electrical parameters include a maximum dynamic impedance of 9 Ohms at test current and a maximum reverse leakage current of 5µA at 9.1V. It supports a DC power dissipation of 1W and withstands a maximum surge current of 380mA. Operating temperatures range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• High reliability construction utilizing glass MELF encapsulation
• Very sharp reverse characteristic for stable regulation
• Low reverse current level to minimize leakage losses

Single Zener Diodes Applications

• Voltage reference circuits requiring precise 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 purchase to avoid counterfeit components. Confirm RoHS compliance status and lead-free finish specifications during sourcing. Ensure storage conditions adhere to Moisture Sensitivity Level 1 requirements. Validate part markings against official datasheet documentation prior to integration into production lines.

Single Zener Diodes Selection Notes

Select this component when a 12V Zener voltage with tight 5% tolerance is required in a surface-mount form factor. The LL-41 package suits space-constrained PCB layouts. Consider the 1W power rating and thermal resistance limits for high-current applications. Verify that the 9 Ohm dynamic impedance meets circuit stability requirements compared to higher impedance alternatives.

Single Zener Diodes Part Context

This part belongs to the DL4728 through DL4761 family of 1W Zener diodes manufactured by Micro Commercial Components. The series covers a wide voltage range from 3.3V to 75V. The 'A' suffix indicates a 5% voltage tolerance, distinguishing it from standard 10% tolerance variants. The 'TP' suffix denotes Tape & Reel packaging for automated assembly.

Single Zener Diodes Replacement Considerations

Equivalent parts include CDLL4742A from Microchip Technology and 1N4742AG from various manufacturers. Ensure replacement devices match the 12V nominal voltage, 1W power dissipation, and LL-41/DO-213AB package dimensions. Verify that dynamic impedance and leakage current specifications meet original design constraints.