1N5353B/TR8

Overview

The Microchip Technology 1N5353B/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 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 16 V with a standard tolerance of ±5%, as indicated by the B suffix. Electrical characteristics include a maximum dynamic impedance of 2.5 Ohms at a test current of 75 mA and a maximum reverse leakage current of 1.0 µA. 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
• Features flexible axial-lead mounting terminals suitable for through-hole applications
• Withstands high surge stresses and exhibits minimal changes in voltage versus current
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring robust thermal performance
• Power supply protection against voltage spikes
• Reference voltage generation in industrial equipment

Procurement Notes

Verify the specific manufacturer origin, as the 1N5353B part number originates from Microsemi, which was acquired by Microchip Technology. Confirm that the TR8 suffix correctly denotes tape and reel packaging per EIA-296 standards. Ensure compliance requirements match the intended application, noting that RoHS compliant versions require an e3 suffix, while this specific designation may indicate tin-lead plating.

Selection Notes

Select this component when a 16 V regulation point is required with a ±5% tolerance. The 5 W power dissipation rating necessitates adequate heat sinking or PCB copper pad area to maintain operation within the specified thermal limits. Consider the T-18 package dimensions for board layout constraints and verify that the lead length allows for proper soldering temperatures up to 260°C.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon Zener diodes. The series offers voltages ranging from 3.3 V to 200 V with various tolerance options identified by suffix letters. The B suffix specifically denotes a standard ±5% voltage tolerance. These devices are characterized by low thermal resistance and high maximum DC current capabilities when properly heat sunk.

Replacement Considerations

Surface mount equivalents are available in the SMBJ5333 to SMBJ5388B or SMBG5333B to SMBG5388B series. For military screening levels, prefixes such as MQ, MX, or MV can be added to access JAN, JANTX, or JANTXV variants respectively.