1N5306/TR

Overview

The Microchip Technology 1N5306/TR is a silicon current regulator diode designed for stable current control across a wide voltage range. It features a nominal regulating current of 2.42 mA and a maximum power dissipation of 500 mW. The device supports an anode-to-cathode voltage of up to 100 V with a maximum limiting voltage of 1.95 V. Operating within a temperature range of -65°C to +175°C, it utilizes the DO-204AA (DO-7) axial leaded package. This component serves as a functional alternative to Zener diodes by regulating current rather than voltage.

Feature Summary

• Provides constant current regulation over a broad voltage range
• Capable of operation in extreme industrial and military temperature environments
• Utilizes axial-leaded packaging for through-hole mounting applications

Applications

• Constant current sources for LED driving circuits
• Biasing networks for transistor amplifiers
• Current limiting protection in sensitive electronic loads

Procurement Notes

Verify the specific suffix against official Microchip documentation to confirm tape-and-reel packaging versus bulk supply. Ensure the requested variant matches the required MIL-PRF-19500/463 qualification level if operating in harsh environments. Cross-reference the manufacturer part number with distributor databases to confirm availability status and lead times prior to ordering.

Selection Notes

Select this component when a fixed current source is required independent of voltage fluctuations. Compare the 2.42 mA nominal current against circuit load requirements. Evaluate the 500 mW power rating to ensure adequate thermal headroom at maximum operating temperatures. Consider the DO-7 package dimensions for PCB layout constraints compared to surface-mount alternatives.

Part Context

This device belongs to the 1N5283-1 through 1N5314-1 series of current regulator diodes manufactured by Microchip Technology. These components are engineered to provide reliable current regulation similar to how Zener diodes regulate voltage. The series offers various current options from 0.22 mA to 4.7 mA in standard tolerances, catering to diverse analog circuit design needs.

Replacement Considerations

Direct substitutes include other 1N5306 variants such as JAN1N5306-1 or JANTX1N5306-1 for qualified versions. Surface-mount equivalents like the 1N5302UR-1/TR may be considered if board space is limited, though pinout and package differences must be addressed.