1N5314

Overview

The Microchip Technology 1N5314 is a silicon current regulator diode within the 1N5283-1 through 1N5314-1 series. It provides a nominal regulating current of 4.7 mA with standard tolerances ranging from 4.23 mA to 5.17 mA at a regulator voltage of 25 V. The device operates in a DO-7 axial-lead package and supports a maximum working peak voltage of 100 V. It dissipates up to 500 mW of steady-state power at a lead temperature of +50 °C, with an operating junction temperature range spanning -65 °C to +175 °C.

Feature Summary

• High source impedance for stable current regulation across broad voltage ranges.
• Internal metallurgical bond construction providing inherent radiation hardness.
• Double-plug internal bond connection with a larger active die element.

Applications

• Current limiting applications requiring stable operation over wide voltage variations.
• Biasing circuits for transistors and other semiconductor devices.
• Protection circuits against excessive current flow in sensitive components.

Procurement Notes

Verify the specific qualification level required for your application, as the 1N5314 is available in JAN, JANTX, JANTXV, and JANS grades per MIL-PRF-19500/463. Confirm whether RoHS compliance is necessary, noting that compliant versions are restricted to commercial grade only. Ensure the ordering suffix matches the desired termination finish and packaging configuration before finalizing procurement.

Selection Notes

Select the 1N5314 when a constant current of approximately 4.7 mA is needed. Verify that the circuit's minimum operating voltage exceeds the knee voltage of 2.75 V to ensure proper regulation. Consider the thermal resistance of 250 °C/W and derating requirements if ambient temperatures exceed +50 °C. Evaluate the high dynamic impedance characteristics to confirm suitability for the intended load stability requirements.

Part Context

This component belongs to the 1N5283-1 through 1N5314-1 family of current regulator diodes. The series offers a selection of currents from 0.22 mA to 4.7 mA in standard 10% tolerances. These devices serve as counterparts to Zener diodes by regulating current over a broad voltage range rather than voltage over a broad current range, utilizing similar axial-leaded packages.

Replacement Considerations

Direct replacements include other manufacturers' equivalents within the 1N5283-1 through 1N5314-1 series. Verify that substitute parts meet the same MIL-PRF-19500/463 qualification levels if military-grade reliability is required. Surface mount alternatives exist in the DO-213AB package (1N5283UR-1 to 1N5314UR-1) for space-constrained designs.