1N4744A_T26A

Overview

The onsemi 1N4744A_T26A is a silicon planar Zener diode housed in a DO-41 glass axial leaded package. It provides a nominal voltage regulation of 15 V with a tolerance of ±5%. The device dissipates up to 1 W at a lead temperature of 50°C or lower, requiring a derating factor of 6.67 mW/°C above this threshold. Electrical characteristics include a maximum dynamic impedance of 14 Ω and a leakage current not exceeding 5 μA. The component operates within a junction and storage temperature range of -65°C to +200°C.

Feature Summary

• Utilizes silicon planar technology for stable voltage regulation
• Features a hermetically sealed glass DO-41 case construction
• Provides sharp reverse characteristic breakdown behavior
• Includes a color band marking to identify the cathode end

Applications

• Voltage stabilization circuits
• Reference voltage sources
• Overvoltage protection networks

Procurement Notes

Verify that the ordering suffix _T26A corresponds to the specific reel quantity and packaging format defined by the manufacturer's internal coding standards. Confirm RoHS compliance status and ensure the component matches the exact JEDEC registration requirements for your design specifications before finalizing procurement orders.

Selection Notes

Select this component when a standard 15 V reference point is required in through-hole designs. Ensure the circuit can accommodate the specified 1 W power dissipation limits and verify that the operating environment remains within the -65°C to +200°C thermal range. Consider the 14 Ω impedance value for load regulation requirements.

Part Context

This part belongs to the widely used 1N47xxA series of Zener diodes manufactured by ON Semiconductor. The series covers a broad voltage spectrum from 3.3 V to 58 V, offering consistent performance across various industrial applications. The 1N4744A specifically targets the mid-range voltage segment, providing reliable regulation for general-purpose electronic systems.

Replacement Considerations

Cross-reference with other manufacturers' 1N4744A equivalents such as Vishay or Microsemi variants. Verify that substitute parts maintain identical DO-41 package dimensions, pinout polarity, and electrical parameters including the 15 V nominal voltage and 1 W power rating.