JANTXV1N5291UR-1/TR

Overview

The JANTXV1N5291UR-1/TR is a current regulator diode manufactured by Microchip Technology, designed for stable current control in electronic circuits. It operates within the JAN1N5283UR-1 through JAN1N5314UR-1 series, providing a regulated current of 616 µA with a maximum limiting voltage of 100 V and a power dissipation rating of 500 mW. The device utilizes silicon technology and is housed in a DO-213AB-2 (MiniMELF) surface-mount package. It features internal metallurgical bonding and meets JANTXV qualification standards per MIL-PRF-19500/463, ensuring reliability in demanding environments.

Feature Summary

• Provides constant current regulation over a broad voltage range using high source impedance characteristics.
• Features internal metallurgical bond construction for enhanced structural integrity and thermal performance.
• Qualified to JANTXV military standards, offering extended temperature operation and radiation hardness compared to commercial variants.

Applications

• Precision biasing networks requiring stable current sources independent of supply voltage fluctuations.
• Protection circuits acting as current limiters to safeguard sensitive downstream components from overcurrent conditions.
• Replacement for Zener diodes in applications where current regulation is preferred over voltage regulation.

Procurement Notes

Verify the specific suffix configuration when ordering, as the /TR designation indicates tape-and-reel packaging which affects handling and storage requirements. Confirm that the JANTXV grade meets the required environmental and reliability specifications for the target application, as this level exceeds standard JAN qualifications. Ensure compatibility with the DO-213AB footprint during PCB layout.

Selection Notes

Select this component when a fixed current value near 616 µA is required with minimal voltage dependency. Compare against the broader 1N5283-1 to 1N5314-1 series if alternative current ratings between 0.22 mA and 10 mA are needed. Consider the DO-213AB package size constraints and verify that the 500 mW power dissipation capability is sufficient for the expected operating voltage and current product.

Part Context

This part belongs to the Microsemi/Microchip family of round-end current regulator diodes, which serve as functional counterparts to Zener diodes by regulating current rather than voltage. The UR-1 suffix denotes the specific MELF-style axial-equivalent package form factor. These devices are engineered for high reliability in aerospace and defense sectors, leveraging established MIL-PRF-19500/463 qualification protocols.

Replacement Considerations

Direct substitutes include other JANTXV1N5291 variants from qualified manufacturers adhering to MIL-PRF-19500/463. Commercial equivalents such as the 1N5291B may be considered only if military-grade reliability and temperature ranges are not required. Verify pinout and package dimensions match the DO-213AB specification before substitution.