1N5289-1

Overview

The Microchip Technology 1N5289-1 is a current regulator diode designed for through-hole mounting in the DO-7 (DO-204AA) axial-leaded package. It provides a regulated current of 473 µA with a maximum voltage rating of 100 V and a power dissipation capacity of 500 mW. The device operates within a junction temperature range of -65°C to 175°C. As part of the 1N5283-1 through 1N5314-1 series, it functions as a constant current source over a broad voltage range, serving as an alternative to Zener diodes which regulate voltage over a broad current range.

Feature Summary

• Provides stable current regulation across a wide operating voltage range
• Utilizes double-plug internal bond connection for enhanced reliability
• Features a larger active die element suitable for current limiting applications

Applications

• Constant current sources for LED biasing
• Current limiting protection in electronic circuits
• Biasing elements for transistor amplifier stages

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm the exact qualification level, such as JAN, JANTX, or JANS, as these designations determine the environmental and performance standards. Ensure the component matches the required MIL-PRF-19500/463 specification if military-grade reliability is mandated for the application.

Selection Notes

Select this component when a fixed low-current regulation is required independent of voltage fluctuations within the specified limits. Compare the 473 µA output against circuit requirements to ensure compatibility with load impedance. Consider the thermal management capabilities of the DO-7 package relative to the 500 mW power dissipation limit under expected operating conditions.

Part Context

This device belongs to the 1N5283-1 through 1N5314-1 series of 0.5-watt current regulators manufactured by Microchip Technology. The series offers various current options ranging from 0.22 mA to 4.7 mA with standard tolerances. These devices are available in commercial versions and qualified levels including JAN, JANTX, JANTXV, and JANS, providing flexibility for different reliability requirements.

Replacement Considerations

Compatible substitutes include other parts from the 1N5283-1 to 1N5314-1 series that match the 473 µA current rating. Verify pinout compatibility and package dimensions for direct replacement in existing PCB layouts.