1N5291-1

Overview

The Microchip Technology 1N5291-1 is a current regulator diode designed for through-hole mounting in the DO-7 (DO-204AA) axial leaded package. It provides a regulated current of 616 µA with a maximum voltage rating of 100 V and a power dissipation capacity of 500 mW. The device operates within a junction temperature range of -65°C to +175°C. As part of the 1N5283-1 through 1N5314-1 series, it offers standard 10% tolerance and serves as a counterpart to Zener diodes by regulating current over a broad voltage range.

Feature Summary

• Provides stable current regulation across a wide voltage range
• Features double-plug internal bond connection for enhanced reliability
• Utilizes larger active die element for unique current limiting function

Applications

• Current limiting circuits
• Constant current sources
• Biasing applications for transistors or LEDs

Procurement Notes

Verify the specific qualification level required for the application, as the 1N5291-1 base number covers JAN, JANTX, JANTXV, and JANS qualified levels per MIL-PRF-19500/463. Confirm that the commercial version meets the necessary environmental and performance standards if military-grade certification is not explicitly specified in the order documentation.

Selection Notes

Select this component when a fixed current source is needed in an axial leaded package. Ensure the circuit voltage does not exceed the 100 V maximum limit. Compare against other series members like 1N5299 for different current values. Verify thermal management requirements given the 500 mW power dissipation rating and operating temperature range up to 175°C.

Part Context

This device belongs to the popular 1N5283-1 through 1N5314-1 series of 0.5 watt current regulators manufactured by Microchip. The series provides a selection of currents from 0.22 mA to 4.7 mA in standard 10% tolerances. These devices are designed to regulate current over a broad voltage range, offering a functional alternative to Zener diodes which regulate voltage over a broad current range.

Replacement Considerations

Check equivalent part numbers from other manufacturers such as Central Semiconductor or Littelfuse that offer similar 616 µA current regulation in DO-7 packages. Ensure replacement parts match the 100 V maximum voltage and 500 mW power dissipation specifications.