1N4749A-T

Overview

The Diodes Incorporated 1N4749A-T is a discontinued 1.0W Zener diode housed in a DO-41 glass package. It features a nominal Zener voltage of 24V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and includes a lead-free finish compliant with RoHS directives.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Lead-free finish compatible with RoHS standards
• Standardized voltage tolerance for consistent regulation

Applications

• Low voltage stabilizers
• Voltage reference circuits
• Overvoltage protection

Procurement Notes

This component is officially marked as obsolete and discontinued by the manufacturer. No alternate part numbers are provided in the documentation. Procurement should be avoided for new designs due to confirmed discontinuation status.

Selection Notes

Designers must select an alternative component because this specific part number is no longer in production. Verify that any replacement meets the required 1.0W power dissipation, 24V nominal voltage, and DO-41 package constraints.

Part Context

The 1N4749A belongs to the 1N4728A through 1N4761A series of one-watt Zener diodes manufactured by Diodes Incorporated. This series provides various nominal voltages ranging from 3.3V to 75V within the same physical form factor.

Replacement Considerations

The datasheet explicitly states there is no alternate part available for this discontinued item. Engineers must source a different manufacturer's equivalent or redesign using a currently active component.

FAQ

Is the 1N4749A-T currently in production?

No, the datasheet identifies the 1N4728A-1N4761A series, including the 1N4749A, as obsolete and discontinued.

What is the maximum power dissipation rating?

The maximum power dissipation is rated at 1.0 Watt at 25°C ambient temperature.