1N5287-1

Overview

The Microchip Technology 1N5287-1 is a current regulator diode designed for stable current control across a wide voltage range. It operates with a maximum peak working voltage of 100V and a maximum regulator current of 363µA. The device features a power dissipation rating of 500mW and an axial leaded DO-7 (DO-204AA) package suitable for through-hole mounting. Qualified under MIL-PRF-19500/463, it supports military grades including JAN, JANTX, JANTXV, and JANS. The operating temperature range spans from -65°C to +175°C.

Feature Summary

• Provides constant current regulation over a broad voltage range as a counterpart to Zener diodes.
• Features high source impedance for effective current stability.
• Utilizes a double-plug internal bond connection within the DO-7 packaging for enhanced reliability.

Applications

• Military and aerospace electronic systems requiring qualified components.
• Constant current sources for LED drivers or biasing circuits.
• Current limiting protection in sensitive analog signal paths.

Procurement Notes

Verify the specific qualification level required for your application, as the base part number covers multiple military grades such as JAN, JANTX, JANTXV, and JANS. Ensure the ordering suffix matches the desired tolerance and testing standards defined in the official datasheet. Confirm package type compatibility during procurement to avoid assembly issues.

Selection Notes

Select this component when a stable low-current source is needed independent of voltage fluctuations. Compare the 363µA output against circuit requirements to ensure proper biasing. Consider the 500mW power rating and thermal management capabilities within the DO-7 package when designing for high ambient temperatures up to 175°C.

Part Context

This device belongs to the popular 1N5283-1 through 1N5314-1 series of 0.5-watt current regulators. These devices offer a selection of currents ranging from 0.22 mA to 4.7 mA with standard 10% tolerances. The series provides axial-leaded packages similar in size to Zener diodes but functions as a current regulator rather than a voltage regulator.

Replacement Considerations

Compatible substitutes include other parts within the 1N5283-1 to 1N5314-1 series that match the 363µA current specification. Verify equivalent MIL-PRF-19500/463 qualification levels if military grade performance is mandatory. Cross-reference dynamic impedance and leakage current parameters to ensure circuit compatibility.