1PMT5943A/TR7

Single Zener Diodes Overview

The Microchip Technology 1PMT5943A/TR7 is a Zener diode rated at 56 V nominal voltage. It operates within a junction and storage temperature range of -55 °C to +150 °C. The device provides a DC power dissipation capability of 3.0 watts when the tab is maintained at 60 °C. Electrical characteristics are measured at a case temperature of 30 °C, with a test current (IZT) of 6.7 mA. The dynamic impedance (ZZT) is specified at 86 ohms, while the reverse leakage current (IR max) is limited to 1 µA at a reverse voltage of 42.6 V. Maximum Zener current (IZM) reaches 42.9 mA.

Single Zener Diodes Feature Summary

• Surface mount packaging designed for automatic insertion equipment
• Integral heat sink locking tabs for thermal management
• Full metallic bottom eliminates solder flux entrapment during assembly

Single Zener Diodes Applications

• Voltage regulation in surface mount circuits
• Power handling applications requiring compact form factors
• Automatic insertion manufacturing processes

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' against official datasheets to confirm tolerance or variant specifications, as standard documentation references suffixes 'B', 'C', and 'D'. Confirm package type and tape & reel dimensions match EIA Standard 481 requirements. Ensure compatibility with the required operating temperature range and power dissipation limits for your application design.

Single Zener Diodes Selection Notes

Select this component when a 56 V Zener reference is needed in a high-power surface mount format. The 3.0 W rating supports higher current loads compared to smaller packages. Verify that the PCB layout accommodates the full metallic bottom and locking tab features for proper mounting and heat sinking.

Single Zener Diodes Part Context

This part belongs to the 1PMT59xx series of Powermite surface mount Zener diodes manufactured by Microsemi/Microchip Technology. The series covers a wide voltage range from 3.3 V to 200 V. These devices are designed to replace larger through-hole packages while maintaining similar power-handling capabilities in a compact molded surface mount footprint.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1PMT5943 variants such as 1PMT5943B, 1PMT5943C, or 1PMT5943D, depending on the required voltage tolerance.