1N4744CP/TR12

Overview

The Microchip Technology 1N4744CP/TR12 is a silicon planar power Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 15 V and a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates in a DO-41 axial lead package with a maximum power dissipation of 1.0 W at 25°C. Electrical characteristics include a test current of 17 mA, a maximum dynamic impedance of 14 Ohms, and a maximum reverse current of 5 µA. It features flexible mounting terminals and is supplied in tape and reel packaging.

Feature Summary

• Provides precise voltage regulation with a standard ±2% tolerance on nominal Zener voltage.
• Features a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.
• Offers flexible axial-lead terminals for standard through-hole mounting applications.
• Includes EIA-296 standard tape and reel packaging options for automated assembly.

Applications

• Voltage regulation circuits requiring stable reference voltages
• Power supply protection against overvoltage conditions
• Clamping applications for transient voltage suppression

Procurement Notes

Verify that the specific ordering suffix matches the required tolerance and packaging configuration. Confirm RoHS compliance status if environmental regulations apply to the end product. Ensure the supplier documentation aligns with the JEDEC registered data sheet specifications for electrical parameters. Check for any military screening prefixes if high-reliability requirements are necessary for the application environment.

Selection Notes

Select this component when a 15 V regulation point with tighter than standard tolerance is required. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the 1.0 W power rating and operating temperature range of -65°C to +150°C for thermal management design. Verify compatibility with existing PCB footprints for the DO-41 package style.

Part Context

This part belongs to the widely used 1N47xx series of 1-watt Zener diodes. The series covers a broad voltage selection from 3.3 V to 100 V. Different suffixes denote variations in tolerance, such as 'A' for 5% or 'C' for 2%. The 'P' suffix indicates plastic encapsulation, while 'TR' specifies tape and reel delivery. This family is known for robust performance in general-purpose electronic circuits.

Replacement Considerations

Equivalent parts within the same series include 1N4744A (5% tolerance) or 1N4744D (1% tolerance). Surface mount equivalents are available as SMAJ4744A or MLL4744A. Verify that substitute components match the 1.0 W power dissipation and DO-41 package dimensions for direct replacement.