1N5287UR-1/TR

Overview

The Microchip Technology 1N5287UR-1/TR is a current regulator diode in the 1N5283UR-1 to 1N5314UR-1 series, designed for surface mount applications. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 500 mW at an ambient temperature of +125°C. The device features a nominal regulator current (IS) of 0.33 mA with a minimum dynamic impedance (zs) of 6.6 MΩ and a minimum knee impedance (zk) of 1.35 MΩ. Its maximum limiting voltage (VL) is 1.0 V. The component utilizes a hermetically sealed DO-213AB glass package.

Feature Summary

• JEDEC registered surface mount equivalent of the 1N5283 through 1N5314 series.
• High source impedance for stable current regulation.
• Internal metallurgical bond construction.
• Qualified per MIL-PRF-19500/463 standards.

Applications

• Current limiting circuits requiring broad operating voltage ranges.
• Temperature-compensated reference circuits.
• Biasing networks for semiconductor devices.

Procurement Notes

Verify that the ordering suffix matches the required qualification level and compliance status. The 'TR' suffix indicates tape and reel packaging. Confirm RoHS compliance requirements, as commercial versions may differ from qualified levels. Ensure the supplier provides documentation confirming the specific manufacturing lot and traceability for military-grade specifications if applicable.

Selection Notes

Select this component when a surface mount current regulator is needed with a nominal current of 0.33 mA. Consider the high dynamic impedance for applications requiring minimal current variation over wide voltage swings. Verify thermal derating requirements above +125°C, as power dissipation decreases by 10 mW per degree Celsius beyond this threshold.

Part Context

This part belongs to the 1N5283UR-1 through 1N5314UR-1 series of 0.5-watt current regulators. These devices serve as counterparts to Zener diodes, regulating current over a broad voltage range rather than voltage over a broad current range. The series offers standard 10% tolerances and is available in both surface mount (DO-213AB) and axial-leaded (DO-7) packages.

Replacement Considerations

Direct equivalents include JAN1N5287UR-1, JANTX1N5287UR-1, and JANTXV1N5287UR-1. Commercial versions without the military prefix are also functionally compatible but may lack radiation hardening or extended temperature qualifications.