1N5288/TR

Overview

The 1N5288/TR is a current regulator diode manufactured by Microchip Technology, designed for stable current control in electronic circuits. It operates with a maximum regulator current of 429 µA and supports a maximum peak working voltage of 100 V. The device features a maximum limit voltage of 1.05 V and dissipates up to 475 mW of power. It is housed in an axial DO-204AA (DO-7) package and supports surface mount or through-hole installation styles depending on specific variant configurations, though this reel version typically aligns with standard axial leaded forms. The component functions reliably within a temperature range of -65°C to +175°C junction temperature.

Feature Summary

• Provides constant current regulation with minimal dynamic impedance for signal stability.
• Operates effectively across extreme industrial temperature ranges without external components.
• Utilizes a robust glass-passivated junction structure for long-term reliability.

Applications

• Biasing networks for transistors and operational amplifiers requiring fixed current sources.
• Protection circuits limiting current flow to sensitive semiconductor devices.
• Constant current drivers for LED indicators and low-power optical sensors.

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure that the ordering information matches the required axial lead form factor if through-hole assembly is intended. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability status and compliance with environmental standards such as RoHS exemptions where applicable.

Selection Notes

Select this component when a precise, temperature-stable current source is needed without complex circuitry. Compare the 429 µA regulation point against load requirements to ensure adequate headroom. Consider the 100 V breakdown rating for high-voltage applications. Evaluate thermal management needs given the 475 mW power dissipation limit in enclosed environments.

Part Context

This part belongs to the 1N528x series of current regulator diodes produced by Microchip Technology. These devices are successors to legacy military-grade specifications, offering modern manufacturing consistency. The TR suffix indicates tape-and-reel packaging for automated assembly processes. This series complements Zener diode offerings by providing current rather than voltage regulation capabilities.

Replacement Considerations

Direct replacements include JAN1N5288UR-1/TR for surface mount MELF variants with identical electrical characteristics. Verify pinout compatibility and thermal resistance differences when substituting between axial and surface mount packages. Consult Microchip's official substitution guide for qualified alternate manufacturers.