1N4744A-T

Overview

The 1N4744A-T is a silicon planar Zener diode manufactured by Vishay General Semiconductor. It provides a nominal regulation voltage of 15 V with a maximum power dissipation of 1.3 W at 25°C ambient temperature. The device features a ±5% voltage tolerance and operates within a junction temperature range of -65°C to +175°C. Packaged in the axial DO-41 (DO-204AL) leaded format, it exhibits a maximum knee impedance of 1500 Ω and a reverse leakage current of 5 µA at 32.7 V.

Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Features an isolated glass case construction
• Supports any mounting position due to robust mechanical design

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific suffix 'T' against the manufacturer's official documentation to confirm the exact packaging configuration, as standard industry usage often associates this suffix with tape-and-reel formats while other variants may use ammo packs or cut tapes. Ensure the procurement order explicitly matches the required package type to avoid receiving non-conforming inventory units that differ in handling specifications.

Selection Notes

Select this component when a 15 V regulation point is required with high thermal stability up to 175°C. The DO-41 through-hole package facilitates manual assembly and prototyping. Consider the 1500 Ω knee impedance for applications where precise dynamic resistance is less critical than basic voltage clamping functionality under low current conditions.

Part Context

This part belongs to the widely utilized 1N47xx series of Zener diodes, known for their reliability in general-purpose electronics. The 1N4744A variant specifically targets the 15 V segment of the market, offering a balance between voltage precision and power handling capabilities suitable for various industrial and commercial power supply designs.

Replacement Considerations

Cross-reference with 1N4744A-TR or 1N4744A-TAP from Vishay for identical electrical performance but different packaging formats. Other manufacturers producing JEDEC-compliant 1N4744A devices may serve as functional substitutes provided they meet the 1.3 W power rating and 15 V tolerance requirements.