1N5366B/TR8

Overview

The Microchip Technology 1N5366B/TR8 is a silicon 5.0-watt Zener diode from the JEDEC registered 1N5333-5388B series, designed for voltage regulation across broad operating current and temperature ranges. It features a T-18 axial-lead package with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards. The device provides a nominal Zener voltage of 39 V with a ±5% tolerance, tested at 30 mA. Key electrical characteristics include a maximum dynamic impedance of 14 Ohms, a maximum reverse leakage current of 500 nA, and a maximum regulator current of 3.1 A. It operates within a temperature range of -65°C to +150°C.

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 per MIL-STD-750 Method 1020

Applications

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

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the presence of the TR suffix indicates tape and reel packaging compliant with EIA-296 standards. Ensure the B suffix corresponds to the required ±5% voltage tolerance. Validate that the device meets the specified moisture classification Level 1 requirements without needing dry pack storage prior to soldering.

Selection Notes

Select this component when a 5-watt power dissipation rating is required for high-current regulation tasks. The T-18 package offers low thermal resistance for effective heat sinking. Consider the specific 39 V Zener voltage and ±5% tolerance for precision applications. Evaluate the need for axial leads versus surface mount equivalents like the SMBJ5366B if board space constraints exist.

Part Context

This part belongs to the 1N5333B through 1N5388B series of 5-watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage selection from 3.3 V to 200 V with various tolerance options identified by suffix letters. These devices are JEDEC registered and utilize plastic encapsulation with tin-lead or RoHS compliant annealed matte-tin plating on the terminals.

Replacement Considerations

Surface mount equivalents such as the SMBJ5366B are available within the same product family.