1N5300UR-1/TR

Overview

The Microchip Technology 1N5300UR-1/TR is a current regulator diode housed in a DO-213AB (MELF, LL41) surface-mount package. It provides a nominal regulating current of 1.3 mA with a tolerance range of 1.17 mA to 1.43 mA at a test voltage of 25 V. The device supports a peak operating voltage of 100 V and dissipates up to 500 mW of power. It operates within a junction temperature range of -65 °C to +150 °C. Key electrical parameters include a minimum regulator impedance of 0.58 MΩ and a maximum limiting voltage of 1.50 V.

Feature Summary

• Features a double-plug internal bond construction for stable current regulation across broad voltage ranges.
• Offers high source impedance and inherent radiation hardness characteristics.
• Provides a leadless hermetically sealed glass case suitable for surface mount applications.

Applications

• Battery-powered indicator circuits
• Capacitor-start circuits
• Constant current sources for LED biasing

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm compliance requirements. Confirm that the TR designation corresponds to tape and reel packaging as specified by the manufacturer. Ensure the procurement channel sources directly from authorized distributors or the manufacturer to guarantee authenticity and traceability.

Selection Notes

Select this component when a constant current source is required over a wide voltage span rather than a fixed voltage reference. Verify that the 1.3 mA nominal current aligns with the load requirements. Check that the 100 V peak voltage rating exceeds the maximum circuit potential. Consider the DO-213AB package dimensions for PCB layout compatibility.

Part Context

This part belongs to the 1N5283UR-1 through 1N5314UR-1 series of 0.5 W current regulators. These devices serve as counterparts to Zener diodes by regulating current over a broad voltage range instead of voltage over a broad current range. The series offers various current options from 0.22 mA to 10.0 mA in standard 10% tolerances.

Replacement Considerations

Equivalent parts within the same series include 1N5299UR-1 and 1N5301UR-1. For axial-leaded equivalents, consider the 1N5300-1. Military qualified versions such as JANTXV1N5300UR-1 are available if environmental ruggedness is required.

FAQ

What is the knee voltage specification for the 1N5300UR-1?

The datasheet defines VK as a specified regulator voltage near the lower knee of the characteristic but does not provide a single fixed numerical value for VK in the electrical characteristics table. It specifies a maximum limiting voltage (VL) of 1.50 V at IL = 0.8 IP(min).

How is the regulator impedance measured?

The minimum regulator impedance (ZS) is derived by superimposing a 90 Hz RMS signal equal to 10% of VS on the operating voltage VS.

Is the 1N5300UR-1 sensitive to electrostatic discharge?

No, the device is described as nonsensitive to ESD in the features and benefits section of the datasheet.