1N5313UR-1

Overview

The Microchip Technology 1N5313UR-1 is a current regulator diode housed in a DO-213AB (MELF, LL41) surface-mount package. It provides a nominal regulating current of 4.73 mA with a tolerance range of 4.23 mA to 5.17 mA at a test voltage of 25 V. The device supports a maximum working peak voltage of 100 V and dissipates up to 500 mW of power. Electrical characteristics include a minimum regulator impedance of 0.235 MΩ and a maximum limiting voltage of 2.90 V. The component operates within a junction temperature range of –65 °C to +150 °C.

Feature Summary

• Double-plug internal bond construction for enhanced reliability
• High source impedance for stable current regulation
• Hermetically sealed glass case suitable for harsh environments
• Inherently radiation hard design

Applications

• Current limiting circuits requiring broad operating voltage ranges
• Temperature-compensated reference circuits
• Biasing networks for semiconductor devices
• Replacement for Zener diodes in constant current applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's nomenclature guide to confirm qualification level and packaging format. The standard commercial version differs from military-grade variants such as JAN or JANS. Confirm RoHS compliance status if environmental regulations apply to the assembly process. Ensure the procurement documentation matches the required MIL-PRF-19500/463 specification.

Selection Notes

Select this component when a constant current source is needed across a wide voltage span rather than a fixed voltage drop. The 4.73 mA nominal current fits mid-range biasing requirements. Verify that the 100 V peak voltage rating exceeds the maximum circuit potential. Consider the DO-213AB package dimensions for PCB layout compatibility and ensure thermal derating is applied above 125 °C.

Part Context

This part belongs to the 1N5283UR-1 through 1N5314UR-1 series of 0.5 W current regulators. It serves as the surface-mount equivalent to the axial-leaded 1N5283–1N5314 series. The series offers currents ranging from 0.22 mA to 10.0 mA. The 1N5313UR-1 specifically targets applications requiring approximately 4.7 mA regulation.

Replacement Considerations

The axial-leaded 1N5313-1 is the direct functional equivalent in a different package. Commercial grade equivalents may be found under the 1N5313 designation without the UR-1 suffix. Military versions require verification of the JAN, JANTX, or JANS qualification suffixes.