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Product Detailed Parameters
- Description：JFET N-Channel -30V Low Ciss
- Series：SMPJ305
- 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)：4 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：2 V @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：3.5pF @ 15V
- Resistance - RDS(On)：250 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 SMPJ305 is an N-Channel JFET designed for low noise and low leakage VHF/UHF applications. It utilizes the InterFET N0026S geometry and features a typical gate leakage of 10pA, input capacitance of 4.3pF, and noise figure of 4 nV/√Hz. The device supports SMT (SOT23) and TH (TO-92) packages. Key electrical parameters include a -30V gate-to-source breakdown voltage, a drain-to-source saturation current minimum of 1mA, and a cutoff voltage minimum of -0.5V.
Feature Summary
- Utilizes InterFET N0026S geometry for optimized performance
- Designed for low noise and low leakage operations
- Supports surface mount and through-hole packaging options
Applications
- Mixers
- Oscillators
- VHF/UHF Amplifiers
Procurement Notes
Verify the specific package variant required, as the SMPJ305 designation corresponds to the SOT23 surface-mount configuration. Confirm that the ordering suffix aligns with the desired bulk or tape-and-reel quantity. Ensure the procurement documentation references the correct datasheet version IF35033.R00 to validate the electrical characteristics against the intended design specifications.
Selection Notes
Select the SMPJ305 when a low-noise N-Channel JFET with minimal gate leakage is required for high-frequency circuits. The device offers a low input capacitance suitable for VHF/UHF designs. Consider the SOT23 package for space-constrained PCB layouts while maintaining the electrical performance of the standard J305 through-hole counterpart.
Part Context
The SMPJ305 belongs to the J304/J305 family of N-Channel JFETs manufactured by InterFET. This series is engineered specifically for low-noise and low-leakage requirements in RF front-end stages. The product line includes both through-hole and surface-mount variants to accommodate diverse manufacturing processes.
Replacement Considerations
The J305 through-hole component serves as the direct functional equivalent. For pin-compatible replacements, verify the specific electrical tolerances and package dimensions against the target application requirements.
FAQ
What is the typical gate leakage current for the SMPJ305?
The typical gate leakage current is 10pA at room temperature.
What packaging options are available for this component?
The SMPJ305 is available in the SOT23 surface-mount package, offered in bulk or tape-and-reel configurations.
What is the maximum reverse gate-to-source voltage rating?
The maximum reverse gate-to-source voltage rating is -30V.
