1N5301

Overview

The JAN1N5301UR-1 is a silicon current regulator diode manufactured by Microchip Technology. It operates within the MIL-PRF-19500/463 military series and utilizes a DO-213AB (MELF, LL41) surface-mount glass package. The device provides a steady-state power dissipation of 500 mW at a lead temperature of 75°C. It features a peak operating voltage range from -55°C to +200°C junction temperature. The component is supplied in bulk packaging and is designed for high-reliability applications requiring precise current regulation.

Feature Summary

• Military-grade reliability compliant with MIL-PRF-19500/463 standards
• Surface-mount MELF glass package for compact integration
• High thermal stability with extended junction temperature ratings

Applications

• Precision constant current sources for analog circuits
• Biasing networks for transistors and LEDs
• Current limiting protection in sensitive electronic systems

Procurement Notes

Verify the specific ordering suffix UR-1 to confirm the surface-mount MELF configuration and military qualification level. Ensure the procurement documentation explicitly references the MIL-PRF-19500/463 standard to validate authenticity. Confirm that the supplier provides traceability records consistent with defense industry requirements for this component class.

Selection Notes

Select this component when a fixed current regulation solution is required in a space-constrained surface-mount design. The MELF package offers superior hermeticity compared to plastic equivalents. Consider the 500 mW power dissipation limit and thermal derating characteristics above 75°C lead temperature during circuit layout planning to ensure long-term operational stability.

Part Context

This part belongs to the 1N5301 family of current regulator diodes produced under military specifications. It serves as a ruggedized alternative to commercial variants, offering enhanced performance across extreme environmental conditions. The JAN prefix indicates it meets Joint Army-Navy specifications for high-reliability semiconductor devices used in critical systems.

Replacement Considerations

Direct substitutes must match the MIL-PRF-19500/463 specification and DO-213AB package dimensions. Verify that any replacement maintains the same current regulation characteristics and thermal limits. Cross-reference with other manufacturers' military-grade current regulator diodes only if they provide equivalent qualification documentation.