1N5306

Overview

The Microchip Technology 1N5306 is a silicon current regulator diode designed for stable current limiting applications. It operates within the 1N5283-1 through 1N5314-1 series, offering a nominal regulating current of 2.2 mA with standard 10% tolerance limits ranging from 1.98 mA to 2.42 mA at a regulator voltage of 25 V. The device features a maximum working peak voltage of 100 V and a steady-state power dissipation of 500 mW at a lead temperature of +50 °C. It utilizes a hermetically sealed DO-7 axial-leaded package with internal metallurgical bonding.

Feature Summary

• Maintains constant current over a broad operating voltage range
• Features high source impedance for effective regulation
• Includes internal metallurgical bond for reliability
• Available in radiation-hardened qualification levels

Applications

• Current limiting circuits requiring stable operation across wide voltage ranges
• Temperature-compensated reference circuits utilizing specific temperature coefficients
• Biasing networks for semiconductor devices needing fixed current sources

Procurement Notes

Verify the specific ordering suffix to confirm the required qualification level, such as JAN, JANTX, or commercial grade. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are typically available only in commercial grades. Ensure the package type matches the design requirements, as both axial-lead and surface-mount options exist within the broader series.

Selection Notes

Select the 1N5306 based on the required nominal regulating current of 2.2 mA. Verify that the application voltage remains below the 100 V maximum working peak voltage limit. Consider the thermal resistance of 250 °C/W when designing heat dissipation strategies, ensuring power derating is applied above +50 °C. Check if radiation hardness is necessary for the target environment.

Part Context

This component belongs to the 1N5283-1 through 1N5314-1 series of 0.5 watt current regulators. The series provides a selection of currents from 0.22 mA to 4.7 mA. These devices serve as counterparts to Zener diodes by regulating current over a broad voltage range rather than voltage over a broad current range.

Replacement Considerations

Other part numbers in the same series, such as 1N5305 or 1N5307, offer different nominal regulating currents (2.0 mA and 2.4 mA respectively) while sharing identical package and electrical rating profiles.