1N5283-1

Overview

The Microchip Technology 1N5283-1 is a single current regulator diode designed for precision constant current applications. It operates within a DO-7 (DO-204AA) axial through-hole package, suitable for robust circuit integration. The device supports a maximum peak operating voltage of 100 V and maintains a maximum limit voltage of 1 V across the regulated range. It regulates a typical current of 242 µA with a maximum power dissipation rating of 500 mW. The component functions reliably across an extended temperature range from -55 °C to +175 °C junction temperature. Key electrical characteristics include a minimum dynamic impedance of 25 mΩ and a minimum knee impedance of 2.75 mΩ, ensuring stable regulation under varying load conditions.

Feature Summary

• Provides precise constant current regulation without requiring external feedback components
• Operates at high peak voltages up to 100 V while maintaining low limit voltage
• Supports extreme thermal environments with operation up to 175 °C junction temperature
• Features low impedance characteristics for stable performance in sensitive circuits

Applications

• Biasing semiconductor lasers and photodiodes requiring stable low-current drive
• Protecting sensitive meter movements or galvanometers from overcurrent damage
• Serving as reference current sources in analog signal processing circuits
• Providing trickle charging or discharge paths for small capacitive loads

Procurement Notes

Verify the specific suffix designation when ordering, as it may indicate packaging variations or manufacturing site changes rather than functional differences. Confirm RoHS compliance status directly with the manufacturer, as historical data indicates non-compliance for this series. Ensure the procurement channel provides valid traceability documentation for the DO-7 axial leaded package to meet quality assurance requirements.

Selection Notes

Select the 1N5283-1 when a fixed microampere-level current source is required in high-voltage or high-temperature environments. Compare its 242 µA regulation point against other members of the 1N528x family if different current levels are needed. Ensure the circuit design accounts for the 500 mW power dissipation limit and the 100 V maximum voltage rating to prevent device failure during transient events.

Part Context

This component belongs to the 1N5283/1N5314 series of current regulator diodes manufactured by Microchip Technology. It shares the same functional architecture and package style as related parts like the 1N5285-1, differing primarily in the regulated current value. The series is characterized by its ability to maintain constant current over a wide voltage range, making it distinct from standard Zener diodes which regulate voltage.

Replacement Considerations

Direct substitutes within the same family include the 1N5285-1, though it regulates a different current (297 µA). Verify that any cross-replacement matches the 242 µA specification and the DO-7 package dimensions. Generic equivalents may exist but require validation of the knee impedance and dynamic resistance parameters to ensure circuit compatibility.