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Product Detailed Parameters
- Description：JFET N-Channel -30V Low Ciss
- Series：SMPJ304
- Mfr：InterFET
- Package：Strip
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：30 V
- Current - Drain (Idss) @ Vds (Vgs=0)：8 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：3 V @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：3.5pF @ 15V
- Resistance - RDS(On)：180 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 SMPJ304 is an N-channel JFET utilizing InterFET N0026S geometry, designed for low noise and low leakage VHF/UHF applications. It features a -30V gate-to-source breakdown voltage (BV_GSS). The drain-to-source saturation current (IDSS) has a minimum of 5 mA, while the gate-to-source cutoff voltage (V_GS(off)) is typically -2 V. Forward transconductance (G_FS) reaches a minimum of 4500 μS at 1 kHz. Input capacitance (C_iss) is typically 4.3 pF, with gate leakage typically less than 10 pA.
Feature Summary
- Utilizes InterFET N0026S geometry for optimized performance in high-frequency circuits.
- Provides low noise characteristics suitable for sensitive signal processing stages.
- Exhibits extremely low gate leakage current to minimize bias drift.
- Offers minimal input capacitance to support VHF and UHF operation.
Applications
- Mixers
- Oscillators
- VHF/UHF Amplifiers
Procurement Notes
Verify the specific package variant required, as the SMPJ304 designation corresponds to the SOT23 surface-mount option. Confirm binning requirements if precise IDSS or VGS(off) thresholds are necessary for the design. Ensure the ordering suffix matches the desired packaging format, such as bulk or tape and reel quantities, to align with assembly processes.
Selection Notes
Select the SMPJ304 when low noise figure and high transconductance are critical for VHF/UHF signal integrity. Compare IDSS and VGS(off) tolerances against circuit biasing constraints. Consider the SOT23 package for space-constrained designs requiring surface-mount technology compatibility.
Part Context
The SMPJ304 belongs to the J304/J305 family of N-channel JFETs from InterFET. This series is engineered specifically for low-noise, low-leakage performance in radio frequency environments. The component shares core electrical characteristics with through-hole and bare die variants within the same product line.
Replacement Considerations
Direct substitutes include the J304 (TO-92) and SMPJ305 (SOT23), which share identical electrical specifications but differ in package type or binning. Verify pinout compatibility and thermal management requirements when transitioning between package styles.
FAQ
What is the typical input capacitance of the SMPJ304?
The typical input capacitance (C_iss) is 4.3 pF at 1 MHz.
What is the maximum reverse gate-source voltage rating?
The maximum reverse gate-source voltage (VRGS) is rated at -30 V.
Does the SMPJ304 support RoHS compliance?
Yes, the J304 and J305 series are RoHS compliant.
