1PMT4625C/TR7

Single Zener Diodes Overview

The Microchip Technology 1PMT4625C/TR7 is a surface mount low noise Zener diode in the Powermite series, housed in a DO-216AA package. It provides a nominal Zener voltage of 5.1 V at a test current of 250 µA with a tight tolerance of ±2%. The device features a maximum steady-state power dissipation of 1.0 W and operates within a junction temperature range of -55 °C to +150 °C. Key electrical specifications include a maximum Zener impedance of 1500 Ohms, a maximum reverse leakage current of 10 µA, and a maximum noise density of 3.0 µV/√Hz.

Single Zener Diodes Feature Summary

• Features a full-metallic bottom design that eliminates solder flux entrapment during assembly.
• Includes a unique locking tab serving as an integral heat sink for efficient thermal management.
• Provides low noise density performance suitable for sensitive signal applications.
• Compatible with automatic insertion equipment for high-density mounting.

Single Zener Diodes Applications

• Voltage regulation circuits requiring low noise characteristics
• High-density surface mount PCB designs
• Automatic insertion manufacturing processes

Single Zener Diodes Procurement Notes

Verify the specific C suffix indicates the required ±2% voltage tolerance rather than the standard ±5%. Confirm the TR7 designation corresponds to the tape and reel packaging format required for your automated assembly line. Ensure the e3 RoHS compliant version matches your environmental compliance standards. Cross-reference the datasheet revision DS00005773A for the most current mechanical and electrical specifications before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 5.1 V reference with tight ±2% accuracy is needed in a compact surface mount footprint. The Powermite package offers superior thermal dissipation compared to standard SMD equivalents due to its metallic base. Consider the low noise density specification if the application involves sensitive analog signal processing or precision voltage referencing where background interference must be minimized.

Single Zener Diodes Part Context

This part belongs to the Microchip Powermite series of 1 Watt Zener diodes, which are surface mount equivalents to the JEDEC registered 1N4625 through 1N4627 axial-leaded series. The series is designed to provide higher power handling capability and lower thermal resistance while maintaining a low-profile form factor. It shares the same functional family as other 1PMT4xxx devices but is distinguished by its specific voltage rating and tolerance level.

Single Zener Diodes Replacement Considerations

Direct replacements include the 1N4625UR series in the DO-213AA package or the axial 1N4625 in DO-35, though these lack the Powermite thermal advantages. Verify that any substitute maintains the required ±2% tolerance and low noise specifications. Check compatibility with existing PCB footprints as package dimensions may differ between DO-216AA and alternative packages.

Single Zener Diodes FAQ

What does the 'C' suffix indicate in the part number 1PMT4625C?

The 'C' suffix denotes a tighter Zener voltage tolerance of ±2%, compared to the standard ±5% tolerance found in parts without the suffix.

How is the cathode polarity identified on the Powermite package?

The cathode is designated by Tab 1, which corresponds to the full metallic bottom of the package.

What is the maximum operating junction temperature for this device?

The maximum junction temperature (TJ) for the 1PMT4625C is +150 °C.