1N5313-1E3/TR

Overview

The 1N5313-1E3/TR is a current regulator diode manufactured by Microchip Technology, designed for surface-mount applications. It operates within the DO-213AB (MELF) package and provides a regulated current of 4.73 mA with a maximum peak operating voltage of 100 V. The device features a maximum limit voltage of 2.75 V and supports a power dissipation of 500 mW. It functions across an extended temperature range from -65°C to +175°C junction temperature. This component serves as a constant current source alternative to Zener diodes, offering high source impedance and internal metallurgical bonding for reliable performance in harsh environments.

Feature Summary

• Provides stable current regulation over a broad voltage range
• Features high source impedance for consistent performance
• Includes internal metallurgical bond for structural integrity
• Available in RoHS-compliant versions for commercial grade

Applications

• Constant current sources for LED driving circuits
• Biasing elements for transistor amplifier stages
• Current limiting protection in sensitive electronic loads

Procurement Notes

Verify the specific ordering suffix to confirm the presence of the E3 designation, which indicates RoHS compliance. Ensure the reel quantity matches the required production volume, as surface-mount variants typically ship in tape-and-reel packaging. Confirm that the MELF package dimensions align with the target PCB footprint and soldering profile requirements before finalizing procurement orders.

Selection Notes

Select this component when a fixed current sink is required within a wide voltage window up to 100 V. The 4.73 mA output is suitable for biasing low-power semiconductor devices. Consider the -65°C to +175°C operating range for industrial or automotive environments. Compare against axial-leaded equivalents if surface-mount space constraints are not present, noting that the MELF package offers different thermal and mechanical characteristics than traditional DO-7 packages.

Part Context

This part belongs to the 1N5283-1 through 1N5314-1 series of current regulator diodes. The series includes both axial-leaded and surface-mount options, with the UR-1 suffix denoting the MELF package variant. The 1N5313-1E3/TR represents the RoHS-compliant, reel-packaged version of the standard 1N5313-1 military-grade qualified device, maintaining identical electrical specifications while meeting environmental directives.

Replacement Considerations

Direct substitutes include the non-RoHS 1N5313-1/TR and the axial-leaded 1N5313-1E3. Verify package compatibility when replacing axial parts with MELF components, as soldering profiles differ. Cross-reference with other manufacturers' 4.73 mA current regulators only if pinout and thermal resistance parameters are explicitly matched.