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Product Detailed Parameters
- Description：JFET N-Channel -30V Low Ciss
- Series：SMPJ304
- Mfr：InterFET
- Package：Tape & Reel (TR)
- 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 SMPJ304TR is an N-Channel JFET from InterFET, utilizing the N0026S geometry in a surface-mount SOT-23 package. It features a gate-to-source breakdown voltage of -30V and a typical input capacitance (Ciss) of 4.3pF at 1MHz. The device exhibits low noise characteristics with a typical value of 4 nV/√Hz and low leakage current typically less than 10pA. Forward transconductance (GFS) ranges from 4500 to 7500 μS at 1kHz. It is designed for VHF/UHF applications requiring low noise and low leakage performance.
Feature Summary
- Utilizes InterFET N0026S geometry for optimized RF performance
- Provides low noise operation suitable for sensitive signal paths
- Features extremely low gate leakage current for high impedance stability
- Offers low input capacitance to minimize signal attenuation at high frequencies
Applications
- Mixers
- Oscillators
- VHF/UHF Amplifiers
Procurement Notes
Verify the specific suffix TR indicates tape and reel packaging configuration. Confirm RoHS compliance status through official documentation before integration. Ensure the ordering part number matches the required binning options if specific electrical parameter tightness is needed for the application design.
Selection Notes
Select this component for designs requiring low noise figure and minimal input capacitance in VHF or UHF bands. Compare GFS and Ciss specifications against circuit requirements for impedance matching. Consider the SOT-23 package constraints for thermal management and PCB layout space limitations compared to through-hole alternatives.
Part Context
This part belongs to the J304/J305 family of N-Channel JFETs manufactured by InterFET. The SMPJ304TR variant specifically denotes the surface-mount version packaged in a SOT-23 case. It shares core electrical characteristics with the through-hole TO-92 version but differs in physical form factor and packaging method for automated assembly.
Replacement Considerations
Direct functional equivalents within the same family include the SMPJ305TR. Verify pinout compatibility and electrical parameter tolerances when substituting between J304 and J305 variants.
