2N5953

Overview

The onsemi 2N5953 is an N-Channel RF Amplifier designed primarily for electronic switching applications, such as low on-resistance analog switching. It operates with a Drain-Gate Voltage of 30 V and a Gate-Source Voltage of -30 V. The device features a Zero-Gate Voltage Drain Current (IDSS) ranging from 2.5 mA to 5 mA at 15 V. Electrical characteristics include a Gate-Source Cut-off Voltage between -0.8 V and -3.0 V, and a Forward Transfer Conductance (gfs) of 1000 to 6500 μ/Ω at 100 MHz. Thermal dissipation is rated at 350 mW with a junction-to-ambient thermal resistance of 357 °C/W.

Feature Summary

• Engineered for low on-resistance analog switching applications
• Optimized for electronic switching performance
• Capable of operation up to 150°C junction temperature

Applications

• Low on-resistance analog switching
• Electronic switching circuits
• RF amplifier stages

Procurement Notes

Verify the specific manufacturer origin, as the component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm that the datasheet revision matches the required specifications for the design. Ensure the package type and pinout configuration align with the PCB layout requirements. Check for any product change notifications regarding material or process updates.

Selection Notes

Select this component when a low on-resistance N-Channel JFET is required for analog switching. Consider the 350 mW power dissipation limit and the 357 °C/W thermal resistance for heat management. Verify that the -30 V gate-source voltage rating suits the control circuitry. Evaluate the noise figure and capacitance parameters if used in sensitive RF signal paths.

Part Context

The 2N5953 belongs to the family of N-Channel Junction Field Effect Transistors (JFETs). Originally manufactured by Fairchild Semiconductor, it is now part of the onsemi portfolio following corporate acquisitions. This device serves as a discrete semiconductor solution for analog signal routing and switching tasks requiring low distortion and high input impedance.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Generic replacements may differ in gfs or IDSS ranges. Ensure any alternative maintains the TO-92 package dimensions and pinout compatibility.