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Product Detailed Parameters
- Description：JFET N-Channel -40V Low Ciss
- Series：SMPJ232
- Mfr：InterFET
- Package：Strip
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：40 V
- Current - Drain (Idss) @ Vds (Vgs=0)：6 mA @ 20 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：4.5 V @ 1 µA
- Input Capacitance (Ciss) (Max) @ Vds：3pF @ 20V
- Resistance - RDS(On)：430 Ohms
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The InterFET SMPJ232 is an N-Channel Junction Field-Effect Transistor (JFET) housed in a surface-mount SOT23 package. It utilizes the InterFET N0016SH geometry to deliver high performance for sensitive amplifier stages. Key electrical characteristics include a gate-to-source breakdown voltage of -40 V, a drain-to-source saturation current of 5 mA, and a gate-to-source cutoff voltage ranging from -3 V to -6 V. The device exhibits a forward transconductance of 2500 μS and low input capacitance of 4 pF. Continuous power dissipation is rated at 360 mW with a junction temperature range of -55°C to 125°C.
Feature Summary
- Utilizes InterFET N0016SH geometry for optimized performance
- Features low noise voltage typical of 5 nV/√Hz
- Provides low input capacitance typical of 4 pF
- Offers multiple packaging options including surface mount
Applications
- Audio Amplifiers
- Small Signal Amplifier
- Ultrahigh Impedance Pre-Amplifier
Procurement Notes
Verify the specific ordering suffix to confirm the packaging format. The SMPJ232 designation indicates the surface-mount SOT23 variant shipped in bulk. Alternative suffixes such as TR denote tape and reel configurations with specified minimum quantities. Ensure the selected part number matches the required manufacturing process and handling specifications for the intended assembly line.
Selection Notes
Select the SMPJ232 when a surface-mount N-Channel JFET with low noise and high impedance is required. This component is suitable for mid-frequency designs where gate leakage must remain minimal. Consider the SOT23 package dimensions for board space constraints. Verify that the -40 V breakdown voltage meets the circuit requirements. Compare against through-hole alternatives if leaded mounting is preferred.
Part Context
The SMPJ232 belongs to the J232 family of N-Channel Silicon Junction Field-Effect Transistors manufactured by InterFET. This series includes variants such as the J232 for through-hole TO-92 packaging and bare die options like COT and CFT. The family shares core electrical characteristics but differs in physical form factor and shipping configuration to accommodate diverse assembly needs.
Replacement Considerations
Direct substitutes within the same family include the J232 for through-hole applications. For surface-mount replacements, verify pinout compatibility between SOT23 packages from other manufacturers. Ensure equivalent electrical parameters such as BVGSS and IDSS are met before substitution.
