1N5308

Overview

The Microchip Technology 1N5308 is a silicon current regulator diode designed for stable current control across a wide voltage range. It operates within the 1N5283 through 1N5314 series, providing a regulated current of 2.7 mA with standard 10% tolerance. The device features a maximum limiting voltage of 2.15 V and supports a power dissipation of 0.5 W. It utilizes the DO-213AB (MELF) package, which incorporates an internal metallurgical bond connection to ensure reliability in demanding environments.

Feature Summary

• Provides constant current regulation over a broad operating voltage range
• Features high source impedance for effective current stability
• Utilizes internal metallurgical bond construction for enhanced durability

Applications

• Constant current sources for LED driving circuits
• Biasing networks for transistor amplifiers
• Current limiting protection in electronic loads

Procurement Notes

Verify the specific suffix designation when ordering, as variants such as JANS or UR-1 may exist with different qualification levels or packaging formats. Confirm that the required MIL-PRF-19500/463 qualification aligns with project specifications. Ensure the MELF package style matches the intended surface mount footprint requirements.

Selection Notes

Select this component when a fixed current value near 2.7 mA is required without complex circuitry. Consider the 2.15 V limiting voltage to ensure sufficient headroom for the application's supply voltage. Evaluate the thermal performance given the 0.5 W power rating and the compact MELF package constraints during layout.

Part Context

This part belongs to the 1N5283 through 1N5314 series of 0.5 W current regulators manufactured by Microchip Technology. The series offers a range of currents from 0.22 mA to 10 mA, allowing designers to choose appropriate values for various biasing and regulation needs while maintaining consistent package and performance characteristics.

Replacement Considerations

Compatible substitutes include other parts from the same 1N5283-1N5314 series with identical 2.7 mA ratings. Verify that alternative sources offer the same DO-213AB MELF package and metallurgical bond construction to maintain mechanical and electrical equivalence.