1PMT5955E3/TR7

Single Zener Diodes Overview

The Microchip Technology 1PMT5955E3/TR7 is a surface-mount Zener diode housed in the Powermite DO-216AA package. It provides a nominal Zener voltage of 180 V with a test current of 2.1 mA and a maximum reverse leakage current of 1 µA. The device supports a DC power dissipation of 3.0 W when mounted to Tab 1 at 60°C, featuring a thermal resistance of 30°C/W from junction to tab. It operates within a temperature range of -55°C to +150°C and includes an integral heat sink locking tab.

Single Zener Diodes Feature Summary

• Surface mount packaging with full metallic bottom to eliminate solder flux entrapment
• Integral heat sink locking tabs for efficient thermal management
• High electrostatic discharge (ESD) rating exceeding 16 kV per human body model
• Compatible with automatic insertion equipment

Single Zener Diodes Applications

• Voltage regulation circuits requiring high power handling in compact form factors
• Protection against overvoltage transients in electronic systems
• Reference voltage generation in precision measurement applications

Single Zener Diodes Procurement Notes

Verify that the ordering suffix E3 confirms lead-free compliance and TR7 indicates tape and reel packaging containing 3,000 pieces. Confirm the specific tolerance class required, as standard versions typically carry ±5% voltage tolerance unless specified otherwise by additional suffixes. Ensure the application design accounts for the 3.0 W power dissipation limit relative to the thermal resistance and mounting conditions.

Single Zener Diodes Selection Notes

Select this component when a high-voltage Zener diode is needed in a surface-mount configuration. The Powermite package offers superior power handling compared to standard small-signal packages. Consider the thermal requirements carefully, as the 3.0 W rating depends on proper mounting to the tab. Verify that the 180 V breakdown voltage aligns with the circuit's regulation or protection thresholds.

Single Zener Diodes Part Context

This part belongs to the 1PMT5913B through 1PMT5956B series of 3-watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. The series utilizes the Powermite surface-mount package, designed to replace larger axial-leaded components while maintaining equivalent power capabilities. The 1PMT5955 variant specifically targets the 180 V segment of this broad voltage range lineup.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1PMT5955 variants such as 1PMT5955B or 1PMT5955A, provided the voltage tolerance and package compatibility match the design requirements.