1N5283-1/TR

Overview

The Microchip Technology 1N5283-1/TR is a current regulator diode designed for through-hole mounting in DO-7 axial-leaded packages. It provides a regulated current of 242 µA with a maximum peak operating voltage of 100 V and a maximum limit voltage of 1 V. The device features a minimum dynamic impedance of 25 mOhms and a minimum knee impedance of 2.75 mOhms. It operates within a temperature range of -65°C to +175°C and has a power dissipation rating of 500 mW. This component serves as a constant current source counterpart to Zener diodes, offering high source impedance for stable current regulation over a broad voltage range.

Feature Summary

• Provides constant current regulation suitable for biasing applications
• High source impedance ensures stable performance across varying voltages
• DO-7 package design includes double-plug internal bond connection for reliability

Applications

• Biasing circuits for transistors and other semiconductor devices
• Constant current sources for LED driving or sensor powering
• Current limiting protection in sensitive electronic circuits

Procurement Notes

Verify the JAN prefix indicates military-grade qualification per MIL-PRF-19500/463 standards. Confirm the /TR suffix denotes tape and reel packaging configuration. Ensure RoHS non-compliance is acceptable for the intended application environment. Cross-reference the specific lot code against manufacturer quality notifications for any recent assembly site changes.

Selection Notes

Select this component when a fixed low-current source is required independent of supply voltage fluctuations. Compare the 242 µA output against circuit load requirements to ensure adequate headroom. Evaluate the 100 V breakdown capability against maximum transient voltages in the system. Consider the DO-7 package size constraints relative to available PCB real estate.

Part Context

This part belongs to the 1N5283-1 through 1N5314-1 series of 0.5 W current regulators. The series offers various current values from 0.22 mA to 4.7 mA in standard tolerances. These devices are JEDEC registered and function similarly to Zener diodes but regulate current instead of voltage. The 1N5283-1 specifically targets applications requiring precise microamp-level current stability.

Replacement Considerations

Direct substitutes include other 1N5283 variants from different manufacturers if military qualification is not mandatory. Verify that replacement parts match the 242 µA nominal current and 100 V maximum voltage ratings. Check for equivalent DO-7 package dimensions and thermal characteristics to ensure mechanical compatibility.