1N5311

Overview

The Microchip Technology 1N5311 is a current regulator diode designed for stable current control in electronic circuits. It operates with a maximum limit voltage of 100V and provides a regulated current of 4.29mA. The device features a power dissipation rating of 500mW, making it suitable for low-power applications. It is housed in a through-hole package, specifically the DO-35 style, which facilitates easy integration into standard printed circuit board layouts. The component supports an operating temperature range from -65°C to +175°C, ensuring reliability across diverse environmental conditions.

Feature Summary

• Provides constant current regulation within specified voltage limits
• Supports wide operating temperature range for harsh environments
• Utilizes through-hole mounting for robust mechanical connection

Applications

• Biasing networks for transistors and integrated circuits
• Current limiting protection in sensitive signal paths
• Reference current sources in analog measurement systems

Procurement Notes

Verify the specific ordering suffix against the official Microchip datasheet to ensure correct packaging and variant selection. Confirm that the required current tolerance and voltage ratings align with the design specifications before procurement. Check for any recent product change notifications or lifecycle status updates directly from the manufacturer to avoid obsolescence risks during production.

Selection Notes

Select this component when a fixed current source is required without complex feedback loops. Ensure the circuit voltage remains below the 100V limit to prevent breakdown. Consider the thermal management requirements given the 500mW dissipation rating. Verify that the through-hole form factor fits the available PCB space and assembly constraints compared to surface-mount alternatives.

Part Context

The 1N5311 belongs to the standard JESD220 series of current regulator diodes, widely recognized for their simplicity and reliability in discrete circuit designs. Manufactured by Microchip Technology, it continues the legacy of robust semiconductor components used in industrial and automotive applications. This part number represents a specific current value within the broader family of adjustable and fixed current regulators offered by the manufacturer.

Replacement Considerations

Direct substitutes include other 1N53xx series current regulators with matching 4.29mA specifications. Verify pinout compatibility and package dimensions when considering cross-brand alternatives. Ensure equivalent thermal and electrical ratings are met to maintain circuit performance and safety margins.