1N5373B/TR12

Overview

The Microchip Technology 1N5373B/TR12 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 nominal Zener voltage of 68 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and includes a tape and reel option indicated by the TR suffix.

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 is nonsensitive to electrostatic discharge (ESD)
• Moisture classification is Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack

Applications

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

Procurement Notes

Verify the specific manufacturer origin, as this part number originates from the Microsemi Scottsdale Division which has undergone corporate restructuring. Confirm RoHS compliance status, as the base datasheet indicates e3 suffixes for compliant devices while the TR12 suffix denotes packaging. Ensure the supplier provides valid traceability documentation given the historical nature of the component lineage.

Selection Notes

Select this component when a 68 V regulation point is required at up to 5 W dissipation. The B suffix ensures a tight ±5% voltage tolerance compared to looser alternatives. Consider thermal management requirements carefully, as the maximum regulator current depends on adequate heat sinking to maintain performance within the specified junction-to-lead thermal resistance limits.

Part Context

This component belongs to the 1N5333B through 1N5388B series of silicon Zener diodes originally manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of voltages from 3.3 V to 200 V in a robust 5-watt axial-leaded package. The 1N5373B specifically targets the 68 V segment of this extensive regulatory lineup.

Replacement Considerations

Equivalent parts include other 5W 68V Zener diodes in T-18 packages such as the 1N5373B without the trailing suffix or generic equivalents like the BYV49C if form factor permits.