1N4749AG/TR

Overview

The Microchip Technology 1N4749AG/TR is a single Zener diode housed in an axial DO-41 package. It provides a nominal Zener voltage of 24 V with a tolerance of ±5%. The device dissipates up to 1 W of power and operates within a temperature range of -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 100 nA, a Zener impedance of 25 Ohms, and a test current of 10.5 mA. The component is supplied in a reel format.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• High thermal stability supporting extended operating temperatures
• Low leakage current characteristics for precision regulation

Applications

• Voltage reference circuits
• Overvoltage protection stages
• General-purpose voltage regulation

Procurement Notes

Verify the specific suffix AG/TR against official Microchip documentation to confirm the exact tolerance and packaging configuration. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity. Cross-reference the RoHS status and lead times with current production notices before finalizing orders.

Selection Notes

Select this component when a stable 24 V reference is required in through-hole designs. The wide operating temperature range makes it suitable for industrial environments. Compare the 25 Ohm impedance against circuit requirements to ensure adequate dynamic performance. Verify that the 1 W power rating aligns with the expected thermal dissipation in the target application.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes manufactured by Microchip Technology. These components are widely used in discrete semiconductor applications requiring reliable voltage clamping. The DO-41 package offers robust mechanical mounting for axial lead implementations.

Replacement Considerations

Consult official substitution guides for compatible equivalents. Generic replacements must match the 24 V Zener voltage, 1 W power rating, and DO-41 package dimensions. Verify that alternative parts meet the same ±5% tolerance and temperature specifications.