1N483B

Overview

The onsemi 1N483B is a small signal diode designed for general-purpose switching and rectification applications. It features an 80 V maximum repetitive reverse voltage and supports a 200 mA average rectified forward current. The device operates within a junction temperature range up to 175 °C and dissipates 500 mW of power. Packaged in the DO-35 axial leaded format, it provides reliable performance with a breakdown voltage of 80 V at 100 µA and low reverse leakage characteristics.

Feature Summary

• Provides high-speed switching capabilities suitable for digital logic circuits
• Features robust thermal stability with a maximum junction temperature of 175 °C
• Offers low forward voltage drop to minimize conduction losses

Applications

• General-purpose rectification in low-power circuits
• Clamping and protection in digital logic interfaces
• Signal demodulation in communication equipment

Procurement Notes

Verify the manufacturer origin as Fairchild Semiconductor or its successor entities like onsemi, as the datasheet reflects historical documentation. Confirm the package style matches the DO-35 specification and ensure compliance with RoHS directives if required by your specific application standards. Cross-reference part numbers carefully due to potential legacy status.

Selection Notes

Select this component when an 80 V reverse voltage rating and 200 mA forward current capacity are sufficient for the circuit requirements. Consider the DO-35 through-hole package for standard PCB layouts. Evaluate the thermal resistance of 300 °C/W to ensure adequate heat dissipation under continuous operating conditions without exceeding the 500 mW power dissipation limit.

Part Context

The 1N483B belongs to the standard 1N4xxx series of silicon planar junction rectifiers originally developed by Fairchild Semiconductor. This series is widely recognized for its reliability in general-purpose electronic applications. The component represents a legacy product line that has been integrated into broader semiconductor portfolios following corporate acquisitions.

Replacement Considerations

Consult official substitution guides for equivalents such as the 1N914 or 1N4148 if higher speed is not critical, though voltage ratings differ. Verify pinout compatibility and thermal characteristics before replacing in existing designs.