1N1373A

Overview

The 1N1373A is a voidless, hermetically sealed bidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology. Qualified to MIL-PRF-19500/516, this component provides robust circuit protection against high-energy transients. It features a peak pulse current rating of 1.8 A measured at 10/1000 µs and a maximum clamping voltage of 273 V under those conditions. The device operates reliably within a junction temperature range of -55°C to +175°C and utilizes an axial through-hole package for secure mounting in demanding environments.

Feature Summary

• Hermetically sealed construction ensures long-term reliability in harsh environments
• Bidirectional design protects circuits from transients on both polarities
• Military qualification meets strict MIL-PRF-19500/516 standards

Applications

• High-reliability aerospace systems
• Military communication equipment
• Harsh environment industrial control circuits

Procurement Notes

Verify the specific qualification level required for your application, as the series includes JAN, JANTX, JANTXV, and JANS variants. Confirm that the axial leaded package aligns with your board layout constraints. Ensure the supplier provides traceability documentation consistent with military procurement standards. Cross-reference the exact part number suffix to guarantee the correct voltage and tolerance specifications are met.

Selection Notes

Select this component when high-reliability transient suppression is critical for mission-critical electronics. The bidirectional capability makes it suitable for AC lines or signal lines susceptible to polarity-independent surges. Consider the 175°C junction temperature rating for applications involving elevated ambient temperatures. Verify that the 273 V clamping voltage is sufficient for the protected circuit's breakdown threshold.

Part Context

This device belongs to the 1N6103A–1N6137A series of industry-recognized TVS diodes. These components are designed specifically for high-reliability applications where standard commercial parts may fail. The series offers various standoff voltages to match different system requirements while maintaining consistent hermetic sealing and military-grade performance characteristics across all models.

Replacement Considerations

Direct replacements must be sourced from the same 1N61xxA series family to maintain qualification levels. Verify that any substitute matches the 1.8 A peak pulse current and 273 V clamping voltage exactly. Ensure the replacement maintains the hermetically sealed axial package form factor.