1N4745CP/TR8

Overview

The Microchip Technology 1N4745CP/TR8 is a silicon 1-watt Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 16 V and a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features a plastic DO-41 (DO-204AL) axial-lead package. Electrical characteristics include a maximum dynamic impedance of 16 Ohms at a test current of 15.5 mA, a maximum reverse current of 57 µA, and a forward voltage of 1.2 V at 200 mA.

Feature Summary

• Provides precise voltage regulation with a ±2% tolerance on nominal Zener voltage.
• Features a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.
• Offers flexible axial-lead mounting terminals suitable for standard through-hole applications.
• Maintains stable operation over a broad operating current and temperature range.

Applications

• Voltage regulation circuits requiring tight tolerance specifications
• Power supply reference voltage generation
• Overvoltage protection in electronic systems

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'P' indicates plastic construction, 'C' denotes a ±2% voltage tolerance, and 'TR8' specifies tape and reel packaging. Confirm RoHS compliance status if applicable, as the datasheet notes RoHS compliant devices are available with an 'e3' suffix. Ensure the procurement request aligns with the manufacturer's specific part numbering conventions to avoid receiving variants with different tolerances or packages.

Selection Notes

Select this component when a 16 V Zener voltage with high precision is required. The ±2% tolerance makes it suitable for applications where standard 5% or 10% variations are unacceptable. Consider the plastic DO-41 package for its lower thermal resistance compared to glass-body options. Verify that the 1 W power dissipation rating and the specified thermal resistance values meet the thermal management requirements of the target circuit design.

Part Context

This component belongs to the 1N4728AP through 1N4764AP series of silicon 1-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers an extensive voltage selection from 3.3 to 100 volts. The 1N4745 variant specifically targets the 16 V regulation point within this lineup, providing a robust solution for general-purpose voltage regulation tasks in industrial and commercial electronics.

Replacement Considerations

Equivalent parts must match the 16 V nominal voltage, 1 W power rating, and ±2% tolerance. Plastic DO-41 packaged Zener diodes from other manufacturers may serve as substitutes if they meet the electrical and mechanical specifications outlined in the datasheet.