J111RL1

Overview

The onsemi J111RL1 is an N-channel depletion-mode Junction Field-Effect Transistor (JFET) designed for chopper applications. It is housed in a TO-92 package with three leads and operates within a junction temperature range of -65°C to +150°C. The device features a maximum drain-gate voltage of -35 Vdc and a total device dissipation of 350 mW at 25°C. Electrical characteristics include a gate-source breakdown voltage of 35 Vdc, a zero-gate-voltage drain current (IDSS) ranging from 2.0 mA to 20 mA, and a static drain-source on-resistance (rDS(on)) up to 30 Ω. The component is supplied in tape and reel packaging.

Feature Summary

• N-channel silicon construction optimized for low-noise chopper transistor functions
• Depletion mode operation providing high input impedance and low leakage
• Lead-free compliant packaging available for environmental standards

Applications

• Precision analog signal switching and chopping circuits
• Low-noise amplifier input stages
• High-impedance buffer configurations

Procurement Notes

Verify the specific ordering suffix RL1 confirms the tape and reel shipping format containing 2000 units per reel. Confirm that the part number includes the G suffix if lead-free compliance is required by the assembly process. Cross-reference the manufacturer's latest datasheet revision to ensure all electrical parameters and mechanical dimensions remain consistent with the design specifications.

Selection Notes

Select this component when a single N-channel JFET with moderate IDSS levels is required for precision switching. Ensure the circuit design accommodates the specified rDS(on) limits and that the operating voltage does not exceed the -35 Vdc breakdown ratings. Consider thermal derating requirements if the ambient temperature exceeds 25°C to maintain safe power dissipation levels.

Part Context

This device belongs to the J111/J112 series of JFET chopper transistors manufactured by onsemi. The J111 variant specifically targets applications requiring lower drain currents compared to the J112. Both devices share identical pinouts and physical packages but differ in their electrical performance ranges, particularly regarding IDSS and VGS(off) specifications.

Replacement Considerations

Direct substitutes within the same family include the J112, which offers higher current capabilities. Other compatible N-channel JFETs may be considered if they match the TO-92 package and meet the required voltage and current thresholds. Verify pinout compatibility and electrical parameter overlaps before implementing any cross-brand replacements.