1N4758APE3/TR8

Overview

The Microchip Technology 1N4758APE3/TR8 is a silicon 1.0-watt Zener diode housed in a plastic DO-41 axial lead package. It provides voltage regulation with a nominal Zener voltage of 56 volts and a standard tolerance of plus or minus 5 percent. The device operates within an ambient temperature range of -65°C to +150°C and features RoHS compliance indicated by the e3 suffix. Electrical characteristics include a maximum reverse current of 100 microamperes at a test voltage of 42.6 volts, a dynamic impedance of 110 ohms at a test current of 4.5 milliamperes, and a maximum forward voltage of 1.2 volts at 200 milliamperes.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Constructed with void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• General purpose industrial applications requiring voltage reference
• Entertainment equipment power supply regulation
• Military and space applications utilizing specific screening levels
• Power supply circuit protection and clamping

Procurement Notes

Verify that the ordering suffix TR8 corresponds to the tape and reel packaging configuration as specified in the manufacturer documentation. Confirm the presence of the e3 suffix indicates RoHS compliant annealed matte-tin plating. Ensure the component matches the JEDEC registered type number 1N4758A with the A suffix denoting the 5 percent voltage tolerance. Cross-reference the datasheet revision date to ensure alignment with current manufacturing specifications.

Selection Notes

Select this component when a 56 volt regulation point is required in a high-power dissipation environment up to 1 watt. Consider the plastic DO-41 package for its lower thermal resistance compared to glass-body options. Evaluate the 110 ohm dynamic impedance for suitability in circuits requiring moderate regulation precision. Verify that the operating temperature range meets the environmental demands of the target application.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of silicon Zener diodes manufactured by Microsemi Scottsdale Division, now part of Microchip Technology. The series offers extensive voltage selection from 3.3 to 100 volts in 5 percent tolerances. These devices are JEDEC registered and available in both plastic and glass encapsulated versions, with the plastic variant providing improved thermal performance.

Replacement Considerations

Surface mount equivalents such as SMAJ4758A or MLL4758A are available from the same manufacturer family. Other manufacturers producing JEDEC registered 1N4758A parts may serve as functional substitutes if electrical parameters match exactly.