1N5310UR-1

Overview

The Microchip Technology 1N5310UR-1 is a surface-mount current regulator diode housed in a DO-213AB (MELF) package. It provides a nominal regulating current of 3.30 mA with a tolerance range of 2.970 mA to 3.630 mA at a regulator voltage of 25 V. The device features a minimum regulator impedance of 0.280 MΩ and a maximum knee impedance of 0.024 MΩ. It supports a peak operating voltage of 100 V and operates within a junction temperature range of –65 °C to +150 °C, dissipating up to 500 mW.

Feature Summary

• Double-plug internal bond construction for robust performance
• High source impedance for stable current regulation
• Inherently radiation hard design suitable for harsh environments
• Leadless hermetically sealed glass case for surface mount integration

Applications

• Constant current sources for LED biasing
• Current limiting protection in electronic circuits
• Biasing elements for transistor amplifier stages
• Reference current generation in analog signal processing

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm material composition and qualification level. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity. Confirm RoHS compliance status if required by environmental regulations, as commercial grades may differ from qualified military versions.

Selection Notes

Select this component when a precise constant current is required over a wide voltage range. Verify that the load voltage remains below the 100 V peak operating limit. Ensure the circuit design accommodates the thermal resistance characteristics and power dissipation limits. Check that the required current tolerance aligns with the standard 10% specification provided in the datasheet.

Part Context

This part belongs to the 1N5283UR-1 through 1N5314UR-1 series of 0.5 W current regulators. It serves as the JEDEC registered surface mount equivalent to the axial-leaded 1N5283–1N5314 series. The device utilizes a DO-213AB package, offering a compact alternative to traditional leaded components while maintaining similar electrical characteristics for current regulation applications.

Replacement Considerations

The 1N5310UR-1 is the surface mount equivalent of the 1N5310-1 axial-leaded device. Direct pin-to-pin replacement requires verifying the mechanical fit within the DO-213AB footprint. Electrical parameters such as regulating current and impedance must match the original design requirements.