1N5387AE3/TR12

Overview

The Microsemi Corporation 1N5387AE3/TR12 is a silicon 5.0-watt Zener diode with a nominal voltage of 190 V and ±10% tolerance. It features an axial-lead T-18 package, operates from -65°C to +150°C, and has a maximum dynamic impedance of 450 ohms at a test current of 5.0 mA. The device includes RoHS-compliant annealed matte-tin plating (e3 suffix) and tape-and-reel packaging (TR suffix).

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range.
• Withstands high surge stresses and exhibits minimal changes in voltage versus current.
• Features flexible axial-lead mounting terminals for through-hole integration.

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify the specific suffixes against official documentation to confirm compliance requirements. The e3 suffix indicates RoHS compliance, while TR denotes tape-and-reel packaging. Confirm that the manufacturer's datasheet aligns with your design specifications before procurement.

Selection Notes

Select this component when a 190 V Zener diode with ±10% tolerance is required. Ensure adequate heat sinking is provided to maintain operation within the 5-watt power dissipation limit. Verify thermal resistance parameters based on the specific PCB copper pad dimensions and track width used in the application.

Part Context

This part belongs to the JEDEC registered 1N5333B through 1N5388B series of 5-watt silicon Zener diodes. The series offers a wide selection of voltages ranging from 3.3 V to 200 V. The 'A' suffix specifically identifies the ±10% voltage tolerance variant within this family.

Replacement Considerations

Consult the official datasheet for equivalent military screening prefixes or surface mount equivalents such as SMBJ5387B or SMBG5387B if lead-free or SMD options are required.

FAQ

What does the 'e3' suffix indicate?

The 'e3' suffix indicates that the device is RoHS compliant and features annealed matte-tin plating on its terminals.

How is the polarity identified?

Polarity is indicated by a band on the plastic encapsulated body; the banded end represents the cathode.