1N4745CP/TR12

Overview

The Microchip Technology 1N4745CP/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package with tape and reel packaging. It provides voltage regulation at a nominal Zener voltage of 16 V with 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 maximum dynamic impedance of 16 Ohms at a test current of 15.5 mA. It includes a maximum reverse current of 5 µA at a test voltage of 12.2 V.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance for stable reference applications
• Utilizes a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Features flexible axial-lead terminals solderable per MIL-STD-750 method 2026
• Offers non-sensitive performance to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources requiring tight tolerance stability
• Protection circuits utilizing surge current handling capabilities

Procurement Notes

Verify that the ordering suffix TR12 corresponds to the specified tape and reel packaging format as defined in the manufacturer's documentation. Confirm the C suffix indicates the required ±2% voltage tolerance. Ensure compatibility with the plastic DO-41 package dimensions and lead configuration for your specific mounting requirements.

Selection Notes

Select this component when a 16 V regulated output with high precision is required in an axial-lead form factor. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the 1.0-watt power dissipation rating and derating curves for thermal management in your design environment.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series of 1.0-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix denotes plastic encapsulation, while the 'TR' suffix indicates tape and reel availability for automated assembly processes.

Replacement Considerations

Equivalent parts include other manufacturers' 1N4745A variants with matching 16 V, 1 W, and ±2% specifications. Surface mount equivalents such as SMAJ4745A are available for space-constrained designs.