1N4737PE3/TR8

Overview

The Microchip Technology 1N4737PE3/TR8 is a silicon 1.0-watt Zener diode in the JEDEC registered 1N4728A to 1N4764A series, housed in a plastic DO-41 axial lead package. It provides voltage regulation with a nominal Zener voltage of 7.5 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features RoHS compliance indicated by the 'e3' suffix. Packaged in tape and reel format per EIA-296 standards, it offers flexible mounting terminals and void-free epoxy encapsulation.

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 a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 7.5 V reference
• Power supply protection against overvoltage conditions
• General purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix matches the required specifications. The 'P' suffix indicates plastic construction, while 'e3' confirms RoHS compliance. The 'TR' suffix denotes tape and reel packaging. Confirm the specific manufacturer source, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the datasheet version aligns with procurement requirements.

Selection Notes

Select this component when a 7.5 V Zener voltage with ±5% tolerance is required in a 1-watt power rating. The plastic DO-41 package is suitable for applications needing lower thermal resistance compared to glass-body options. Consider the -65°C to +150°C operating range for environmental suitability. Verify if the tape and reel packaging meets automated assembly needs or if bulk quantities are preferred.

Part Context

This part belongs to the popular 1N4728AP through 1N4764AP series of 1.0-watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 1N4737 variant specifically targets the 7.5 V regulation point. These devices are JEDEC registered and offer extensive voltage selection for various circuit design requirements.

Replacement Considerations

Equivalent parts include other 1N4737 variants from different manufacturers, such as those in glass bodies (1N4737G) or surface mount packages like SMAJ4737A. Verify electrical parameters match exactly before substitution.