1N4744A_NT50A

Overview

The onsemi 1N4744A_NT50A is a silicon planar Zener diode designed for voltage regulation within the 1N4728A to 1N4758A series. It features a DO-41 glass case with double slug construction and oxide passivated die. The device provides a nominal Zener voltage of 15 V at a test current of 17 mA, with a maximum dynamic impedance of 14 Ω at this current level. It supports a maximum steady-state power dissipation of 1.0 W at a lead temperature of 50°C or less, requiring a derating factor of 6.67 mW/°C above that threshold. The component operates across an extended temperature range from -65°C to +200°C.

Feature Summary

• Utilizes double slug type construction with metallurgically bonded oxide passivated die for enhanced stability.
• Features hermetically sealed glass encapsulation in a DO-41 package to ensure corrosion resistance.
• Provides precise voltage regulation with a standard tolerance of 5%.

Applications

• Voltage reference circuits
• Overvoltage protection
• Clipper and clamper circuits

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging details, as suffixes may indicate variations in reel size or tape configuration without altering electrical performance. Confirm RoHS compliance status and marking specifications directly with the manufacturer's datasheet before finalizing procurement orders.

Selection Notes

Select this component when a stable 15 V reference is required in through-hole designs. Ensure the circuit design accommodates the 1.0 W power dissipation limit and applies appropriate thermal derating if ambient temperatures exceed 50°C. Verify that the 14 Ω dynamic impedance meets the ripple rejection requirements of the target application.

Part Context

This part belongs to the 1N47xxA series of Zener diodes manufactured by onsemi. The series covers a wide voltage range from 3.3 V to 100 V, all sharing similar physical dimensions and construction methods. The 1N4744A specifically targets the 15 V segment of this lineup, offering consistent performance characteristics aligned with other devices in the family.

Replacement Considerations

Direct replacements include the 1N4744A from other manufacturers such as Nexperia or Vishay, provided they meet the same 15 V nominal voltage, 1 W power rating, and DO-41 package constraints. Cross-referencing top markings and electrical tolerances is recommended to ensure functional equivalence.