1N5354B/TR12

Overview

The Microchip Technology 1N5354B/TR12 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 17 V with a ±5% tolerance (B suffix) and operates within a junction-to-lead thermal resistance of 25 °C/W. Electrical characteristics include a maximum reverse leakage current of 500 nA at 12.2 V, a dynamic impedance of 2.5 Ohms, and a maximum regulator current of 5.8 A when adequately heat sunk.

Feature Summary

• Provides stable voltage regulation over a wide range of operating currents and temperatures
• Withstands high surge stresses and offers minimal changes in voltage versus current
• Features flexible axial-lead mounting terminals suitable for through-hole applications
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack

Applications

• Voltage regulation circuits requiring robust thermal performance
• Power supply protection against high surge stresses
• General purpose voltage reference applications in industrial equipment

Procurement Notes

Verify component authenticity by checking manufacturer markings and datasheet alignment. Confirm RoHS compliance status as the 'e3' suffix indicates lead-free plating while standard suffixes may differ. Ensure proper heat sinking is utilized to maintain power dissipation ratings within specified limits during operation.

Selection Notes

Select this component for applications requiring a 17 V Zener voltage with tight ±5% tolerance. Consider the 5 W power rating and T-18 package dimensions for mechanical fit. Evaluate thermal management requirements based on the 25 °C/W junction-to-lead resistance to ensure reliable operation under maximum load conditions.

Part Context

This part belongs to the 1N5333B through 1N5388B series of silicon 5-watt Zener diodes manufactured by Microsemi, now part of Microchip Technology. The series covers a voltage selection from 3.3 to 200 volts with various tolerance options identified by specific suffix letters. These devices are JEDEC registered and designed for high reliability in demanding environments.

Replacement Considerations

Equivalent parts within the same series include 1N5353B and 1N5355B for adjacent voltage levels. Surface mount equivalents such as SMBJ5354B or SMBG5354B are available for space-constrained designs. Verify that replacement components match the required voltage tolerance and power dissipation capabilities.