1N4758A-TR

Overview

The Vishay General Semiconductor - Diodes Division 1N4758A-TR is a silicon planar power Zener diode designed for stabilizing and clipping circuits. It features a nominal Zener voltage of 56 V with a standard tolerance of ±5 %. The device operates within a test current range of 3.3 to 76 mA, providing a maximum power dissipation of 1300 mW at thermal equilibrium. Packaged in the DO-41 (DO-204AL) axial through-hole format, it supports a junction temperature up to 175 °C and a storage temperature range from -65 °C to +175 °C.

Feature Summary

• Silicon planar construction optimized for high-power stabilization and clipping applications
• Standard Zener voltage tolerance of ±5 % ensures consistent regulatory performance
• Glass passivated chip design provides hermetic sealing for enhanced stability and reliability

Applications

• Voltage stabilization circuits
• Signal clipping applications
• General purpose industrial equipment
• Military and space electronics

Procurement Notes

Verify that the ordering code suffix matches the required tape configuration, as the datasheet specifies distinct codes for taped units per reel versus ammopack formats. Confirm compliance with RoHS3 standards and ensure the component meets AEC-Q101 automotive qualification requirements if deployed in vehicle systems. Validate lead temperatures during soldering do not exceed the specified peak limits.

Selection Notes

Select this component when a 56 V regulation point is required with a 1.3 W power rating. Ensure the application circuit maintains the leads at ambient temperature within 4 mm of the case to achieve the rated power dissipation. Verify that the operating current falls within the specified test current range to maintain the ±5 % voltage tolerance accuracy.

Part Context

This part belongs to the 1N4728A to 1N4761A series of silicon planar power Zener diodes manufactured by Vishay Semiconductors. The series covers a broad Zener voltage spectrum from 3.3 V to 75 V, utilizing the standardized DO-41 glass axial package. These components are engineered for robust operation in demanding environments, offering high thermal stability and reliable long-term performance.

Replacement Considerations

Direct substitute part numbers include 1N4758A-TAP and 1N4758A-TR. When replacing, verify that the alternative packaging format aligns with the assembly line requirements and that the electrical characteristics remain identical to the original specification.

FAQ

What is the maximum surge current rating for the 1N4758A?

The maximum surge current (IZM) for the 1N4758A is 80 mA.

How does the dynamic resistance vary between test currents?

At the primary test current (IZT1), the dynamic resistance (ZZT) is typically 110 Ω. At the secondary test current (IZT2), the dynamic resistance (ZZK) increases to 2000 Ω.