1N5388A/TR8

Overview

The Microsemi Corporation 1N5388A/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, designed for voltage regulation across a broad operating current and temperature range. It features a nominal Zener voltage of 200 V with a ±10% tolerance, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +150°C and utilizes a T-18 axial-lead package. Electrical characteristics include a maximum dynamic impedance of 480 Ohms at a test current of 5 mA, a maximum reverse leakage current of 500 µA tested at 144 V, and a maximum regulator current of 23.6 mA.

Feature Summary

• Provides stable voltage regulation over a wide operating current and temperature range
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals suitable for through-hole applications
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive electronic components
• Reference voltage generation in measurement equipment

Procurement Notes

Verify the specific suffix configuration against official datasheets to confirm tolerance levels and screening requirements. Confirm RoHS compliance status as standard versions may not meet environmental directives. Ensure adequate heat sinking is provided during operation to maintain performance within specified thermal limits.

Selection Notes

Select this component when a high-voltage regulation point near 200 V is required with moderate precision. Consider the T-18 package dimensions for PCB layout constraints. Evaluate thermal management strategies based on the specified junction-to-lead thermal resistance to ensure reliable operation under steady-state conditions.

Part Context

This part belongs to the Microsemi Scottsdale Division's 1N5333-5388B series of silicon 5-watt Zener diodes. The series offers a wide selection of voltages from 3.3 V to 200 V with various tolerance options identified by suffix letters. These plastic encapsulated devices are moisture classification Level 1 and available in military equivalent screening levels with specific prefixes.

Replacement Considerations

Surface mount equivalents such as SMBJ5333 to SMBJ5388B or SMBG5333B to SMBG5388B are available from the same manufacturer. Verify pinout compatibility and thermal dissipation capabilities when transitioning between axial lead and surface mount packages.