1N4744CP/TR8

Overview

The Microchip Technology 1N4744CP/TR8 is a silicon planar power Zener diode with a nominal voltage of 15 V and a tight tolerance of ±2%. It operates in the DO-41 axial lead package, dissipating up to 1.0 W at 25°C. The device features a maximum reverse current of 5 µA and a dynamic impedance of 14 Ω at a test current of 17 mA. It supports an operating temperature range from -65°C to +150°C and is supplied in tape and reel packaging.

Feature Summary

• Provides precise voltage regulation with a ±2% tolerance for stable reference applications
• Features flexible axial-lead mounting terminals suitable for through-hole PCB integration
• Operates reliably across a broad temperature range from -65°C to +150°C

Applications

• Voltage regulation circuits requiring high precision
• Reference voltage sources in measurement equipment
• Overvoltage protection in sensitive electronic systems

Procurement Notes

Verify that the specific part number includes the 'C' suffix to confirm the required ±2% voltage tolerance. Ensure the 'TR8' suffix matches the intended tape and reel packaging specifications for automated assembly processes. Confirm RoHS compliance status if environmental regulations apply to the final product design.

Selection Notes

Select this component when a standard 1W Zener diode requires tighter voltage accuracy than the typical ±5% or ±10% options. The plastic encapsulation offers lower thermal resistance compared to glass-body alternatives. Consider the 14 Ω dynamic impedance and 5 µA leakage current when designing low-power or high-impedance reference circuits.

Part Context

This component belongs to the 1N47xx series of 1-watt Zener diodes manufactured by Microchip Technology (formerly Microsemi). The series covers a wide voltage range from 3.3V to 100V. The 'P' suffix indicates plastic construction, while the 'C' suffix denotes the specific 2% tolerance grade within the JEDEC registered lineup.

Replacement Considerations

Equivalent parts include the 1N4744A with looser tolerances or other manufacturers' 1N4744 variants. Verify that any substitute maintains the 15V nominal voltage, 1W power rating, and DO-41 package dimensions to ensure mechanical compatibility.