1N4737UR/TR

Overview

The Microchip Technology 1N4737UR/TR is a surface mountable 1.0 W glass Zener diode in the DO-213AB (MELF) package. It provides a nominal Zener voltage of 7.5 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum dynamic impedance of 4.0 Ω at a test current of 34 mA. It includes a specified reverse leakage current of 10 µA at 5 V and a maximum forward voltage of 1.2 V at 200 mA.

Feature Summary

• Hermetically sealed glass MELF construction for high reliability
• Surface mount design suitable for high density mounting
• Inherently radiation hard per MicroNote 050
• ESD nonsensitive characteristics

Applications

• Voltage regulation in high density circuits
• Low parasitic requirement applications
• High reliability applications requiring source control drawings

Procurement Notes

Verify that the ordering suffix 'TR' confirms tape and reel packaging as specified in the datasheet. Confirm the 'e3' designation indicates RoHS compliance if required by the bill of materials. Ensure the part number matches the specific 7.5 V variant within the 1N4728UR through 1N4764AUR series.

Selection Notes

Select this component when a 1.0 W surface mount Zener diode is needed for voltage regulation. The DO-213AB package is appropriate for automated assembly processes. Consider the wide operating temperature range and radiation hardness for demanding environments.

Part Context

This device belongs to the 1N4728UR thru 1N4764AUR series, which are electrically equivalent to the JEDEC registered 1N4728A thru 1N4764A axial leaded series but packaged in the DO-213AB outline. The series covers Zener voltages from 3.3 V to 100 V.

Replacement Considerations

Equivalent axial leaded parts include the 1N4737A. Surface mount equivalents such as SMAJ4737A may be considered if pinout compatibility allows.