1N5289

Overview

The Microchip Technology 1N5289 is a current regulator diode designed for through-hole mounting in the DO-7 (DO-204AA) axial package. It provides a regulated current of 473 µA with a maximum power dissipation of 500 mW and an anode-to-cathode voltage rating of 100 V. The device operates within a junction temperature range of -65°C to +175°C and features a maximum limiting voltage of 1.05 V. This component is part of the 1N5283–1N5314 series, offering stable current regulation for precision electronic applications.

Feature Summary

• Maintains constant current output across varying load conditions
• Operates reliably in extreme thermal environments up to 175°C
• Provides high impedance isolation between input and output

Applications

• Biasing circuits for transistors and active components
• Constant current sources for LED drivers
• Reference current generation in analog signal processing

Procurement Notes

Verify the specific ordering suffix against official Microchip documentation to confirm packaging format and compliance status. Ensure the procurement channel sources directly from authorized distributors to guarantee authenticity. Confirm RoHS and REACH compliance requirements match project specifications before finalizing orders.

Selection Notes

Select this component when a fixed low-current regulation of approximately 473 µA is required. Consider the 100 V breakdown voltage and 500 mW power limit for circuit design constraints. Evaluate the DO-7 package dimensions for PCB layout compatibility and verify thermal management needs for operation near the upper temperature limit.

Part Context

The 1N5289 belongs to the 1N5283–1N5314 family of current regulator diodes manufactured by Microchip Technology. These devices share the same DO-7 axial leaded package and general functional architecture but differ in their specific regulated current values. This series is widely used in discrete semiconductor applications requiring simple, reliable current limiting without complex feedback loops.

Replacement Considerations

Cross-reference other parts within the 1N5283–1N5314 series if different current levels are acceptable. Verify pinout and package compatibility for any alternative current regulator diodes. Consult Microchip's official substitution guide for confirmed equivalent components.