1N5288UR-1/TR

Overview

The Microchip Technology 1N5288UR-1/TR is a surface-mount current regulator diode housed in the DO-213AB (MELF, LL41) package. It provides a nominal regulator current of 0.39 mA with a maximum limit of 0.429 mA at a voltage of 25 V. The device features a maximum limiting voltage of 1.05 V and supports a peak operating voltage of 100 V. It operates within a junction temperature range of -65 °C to +150 °C and dissipates up to 500 mW of power. The component utilizes internal metallurgical bonding for reliability.

Feature Summary

• JEDEC registered surface mount equivalent of the 1N5283 through 1N5314 series
• Double-plug construction providing high source impedance
• Inherently radiation hard design suitable for harsh environments
• Hermetically sealed glass case with leadless package

Applications

• Current regulation over broad operating voltage ranges
• Temperature-compensated reference circuits
• Biasing networks for semiconductor devices

Procurement Notes

Verify that the ordering suffix /TR indicates tape and reel packaging as specified by the manufacturer. Confirm the specific qualification level required, such as JAN or JANTX, as these affect the MIL-PRF-19500/463 compliance status. Ensure the procurement documentation matches the exact part number to avoid confusion with axial-leaded equivalents.

Selection Notes

Select this component when a stable current source is needed across varying voltages rather than a fixed voltage reference. The DO-213AB package is appropriate for automated surface mount assembly processes. Consider the 10% standard tolerance and the specific knee impedance requirements for precision applications involving low-voltage operation near the regulating threshold.

Part Context

This device belongs to the 1N5283UR-1 through 1N5314UR-1 family of 0.5 watt current regulators manufactured by Microchip Technology. It serves as the surface-mount counterpart to the traditional axial-leaded 1N5283 series. The UR-1 designation identifies it as a specific variant within the broader current regulator product line designed for robust performance.

Replacement Considerations

The axial-leaded 1N5288-1 is the direct functional equivalent but requires through-hole mounting. Other members of the 1N5283-1N5314 series offer different current ratings but share similar electrical characteristics and package options.