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Product Detailed Parameters
- Description：JFET N-CH 40V SOT23-3
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR)
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：30 mA @ 20 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：5 V @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：16pF @ 20V
- Resistance - RDS(On)：30 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 MMBF4091 is an N-channel depletion-mode JFET in a SOT-23 package. It features a Drain-Gate Voltage of 40 V and Gate-Source Voltage of -40 V. The device operates within a junction temperature range of -55°C to +150°C. Electrical characteristics include a maximum Drain-Source On Resistance (rDS(on)) of 30 Ω at ID = 1 mA, and a Zero-Gate Voltage Drain Current (IDSS) of up to 30 mA at VDS = 20 V. Input capacitance (Ciss) is 16 pF, while reverse transfer capacitance (Crss) is 5 pF.
Feature Summary
- Designed for low-level analog switching applications
- Suitable for sample and hold circuits
- Optimized for chopper stabilized amplifiers
Applications
- Low level analog switching
- Sample and hold circuits
- Chopper stabilized amplifiers
Procurement Notes
Verify the specific part number suffix against current ON Semiconductor databases, as Fairchild nomenclature using underscores has been transitioned to dashes. Confirm that the ordering information matches the latest system requirements on the official manufacturer website to ensure compatibility with updated product management systems.
Selection Notes
Select this component based on its specific rDS(on) and IDSS limits required for the target circuit. Ensure the application voltage does not exceed the 40 V Drain-Gate or -40 V Gate-Source ratings. Consider the thermal resistance and power dissipation capabilities when designing for high ambient temperatures.
Part Context
This device belongs to the MMBF4091/4092/4093 family of N-channel switches. It is sourced from Process 51 technology. The part was originally manufactured by Fairchild Semiconductor before integration into ON Semiconductor, which manages the current product lifecycle and documentation.
Replacement Considerations
MMBF4092 and MMBF4093 are direct functional substitutes within the same series, differing primarily in their specific rDS(on) and IDSS electrical thresholds.
FAQ
Are the source and drain terminals interchangeable?
Yes, the datasheet notes that the Source and Drain terminals are interchangeable.
What is the operating mode of this device?
The MMBF4091 operates in Depletion Mode.
What is the maximum junction temperature?
The maximum operating and storage junction temperature is 150°C.
