1N5308UR-1/TR

Overview

The 1N5308UR-1/TR is a silicon current regulator diode manufactured by Microchip Technology. It operates in the DO-213AB (MELF) surface-mount package with two terminals. The device regulates a steady current of 2.7 mA with a maximum limiting voltage of 2.15 V. It features an isolated case connection and metallurgical bonding within a glass encapsulation. The component supports a wide operating temperature range from -65°C to +175°C junction temperature.

Feature Summary

• Maintains constant current over a broad voltage range using internal metallurgical bond technology.
• Provides high source impedance for stable regulation performance.
• Utilizes a round-end MELF package suitable for automated surface-mount assembly.

Applications

• Constant current sources for LED biasing circuits.
• Current limiting protection in electronic power supplies.
• Biasing elements for transistor amplifier stages.

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm tape-and-reel packaging configuration. Ensure the part number matches the required regulatory compliance standards, such as RoHS or military specifications, if applicable to the design requirements. Cross-reference the manufacturer's latest datasheet for any updates on lead-free status or material composition changes.

Selection Notes

Select this component when a precise 2.7 mA regulation current is required within a low-profile surface-mount form factor. Consider the 2.15 V limiting voltage to ensure adequate headroom for the application circuit. Evaluate the thermal management capabilities given the 500 mW power dissipation rating and the specified operating temperature range.

Part Context

This device belongs to the 1N5283UR-1 through 1N5314UR-1 series of 0.5-watt current regulators. The series offers various current options ranging from 0.22 mA to 10 mA in standard tolerances. These components are designed for applications requiring reliable current stabilization in compact electronic systems.

Replacement Considerations

Compatible substitutes include other parts from the 1N53xx series with matching 2.7 mA regulation characteristics. Verify pinout compatibility and package dimensions before substitution. Ensure the alternative device meets the same voltage and temperature specifications.