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Product Detailed Parameters
- Description：JFET N-CH 30V SOT23-3
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：30 V
- Drain to Source Voltage (Vdss)：30 V
- Current - Drain (Idss) @ Vds (Vgs=0)：5 mA @ 20 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：500 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：14pF @ 20V
- Resistance - RDS(On)：100 Ohms
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The MMBF4393 is an N-Channel Junction Field Effect Transistor (JFET) manufactured by onsemi. It features a Drain-Source Voltage of 30 V and a Gate-Source Breakdown Voltage of -30 V. The Zero-Gate Voltage Drain Current ranges from 5 mA to 30 mA at VDS = 20 V. The device has a maximum power dissipation of 350 mW and operates within a junction temperature range of -55°C to 150°C. It utilizes a SOT-23 surface-mount package.
Feature Summary
- Designed for low-level analog switching applications
- Suitable for sample and hold circuits
- Compatible with chopper stabilized amplifier designs
Applications
- Analog signal switching
- Sample and hold circuitry
- Chopper stabilized amplifiers
Procurement Notes
Verify the specific ordering suffix against official documentation, as variations exist in packaging methods such as tape and reel configurations. Confirm that the component meets RoHS compliance standards required for your manufacturing process. Ensure the source is an authorized distributor to guarantee genuine parts and full traceability, avoiding unauthorized sources that may supply counterfeit components.
Selection Notes
Select this component when an N-Channel JFET with a 30 V voltage rating is required. The MMBF4393 offers a lower drain current range compared to other variants in the series, making it suitable for specific biasing conditions. Verify that the SOT-23 package dimensions align with your PCB land pattern requirements before finalizing the design.
Part Context
This device belongs to the MMBF439xL family of N-Channel switches. It shares architectural similarities with the J111 but is optimized for surface-mount integration. The product line includes variants with different drain current specifications to accommodate diverse circuit requirements while maintaining consistent voltage ratings and package types.
Replacement Considerations
Direct substitutes include the MMBF4391 and MMBF4392. These components share identical voltage ratings and physical packages but differ in their zero-gate voltage drain current specifications. Verify that the alternative part's current characteristics meet the specific requirements of your application circuit.
FAQ
Are the source and drain terminals interchangeable?
Yes, the datasheet specifies that the source and drain terminals are interchangeable.
What is the gate-source cut-off voltage range?
The gate-source cut-off voltage ranges from -0.5 V to -3.0 V under specified test conditions.
How does the input capacitance vary?
The input capacitance is typically 14 pF when measured at VDS = 20 V and VGS = 0.
