1N5297

Overview

The Microchip Technology 1N5297 is a current regulator diode designed for stable current control across a wide voltage range. It operates with a regulated current of 1 mA and a maximum limit voltage of 1.35 V. The device supports a maximum working voltage of 100 V and handles a power dissipation of 475 mW. It is available in the DO-213AB surface-mount package and the DO-7 axial through-hole package. Qualified under MIL-PRF-19500/463, it serves as a voltage-independent current source counterpart to Zener diodes.

Feature Summary

• Provides constant current regulation over a broad voltage range
• Available in hermetically sealed military-grade packages
• Functions as a current limiter with internal double-plug bond connection

Applications

• Military and aerospace electronic circuits requiring strict reliability
• Current limiting protection for sensitive semiconductor components
• Biasing networks for transistors and integrated circuits

Procurement Notes

Verify the specific suffix (e.g., UR, -1) to confirm the package type and qualification level. Ensure the ordering code matches the required MIL-PRF-19500/463 grade. Confirm manufacturer origin, as multiple vendors produce this component. Check for hermetic sealing requirements if operating in harsh environments.

Selection Notes

Select based on the required regulated current tolerance and maximum operating voltage. Choose between DO-7 axial or DO-213AB SMD packages depending on board layout constraints. Verify thermal management capabilities for the 475 mW dissipation rating. Ensure the selected variant meets the specific environmental qualification standards required by the application.

Part Context

This component belongs to the 1N5283-1 through 1N5314-1 series of 0.5 watt current regulators. These devices offer standard 10% current tolerances and are designed to regulate current similarly to how Zener diodes regulate voltage. The series provides options ranging from 0.22 mA to 4.7 mA in various axial and surface-mount packages.

Replacement Considerations

JANTX1N5297UR

FAQ

What is the primary function of the 1N5297 compared to a Zener diode?

The 1N5297 regulates current over a broad voltage range, whereas a Zener diode typically regulates voltage over a broad current range.

Does the 1N5297 support high-temperature operation?

Yes, the device is qualified for military applications and supports extended temperature ranges suitable for harsh environments.