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Product Detailed Parameters
- Description：JFET N-CH 25V TO92-3
- Series：-
- Mfr：onsemi
- Package：Bulk
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：25 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：30 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：600 mV @ 100 nA
- Input Capacitance (Ciss) (Max) @ Vds：-
- Resistance - RDS(On)：-
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：TO-226-3, TO-92-3 (TO-226AA)
- Supplier Device Package：TO-92-3
- Grade：-
- Qualification：-
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Overview
The BF247A is an N-channel junction field-effect transistor (JFET) designed for electronic switching and analog applications. It features a TO-92 package with three terminals: Gate, Source, and Drain. Key electrical parameters include a drain-gate voltage of 25 V and a gate-source breakdown voltage of -25 V. The device exhibits a zero-gate voltage drain current ranging from 30 mA to 80 mA at 15 V. Forward transfer conductance is specified at a minimum of 8 mS under standard test conditions. Thermal characteristics indicate a total device dissipation of 350 mW at 25°C, derating by 2.8 mW/°C above this temperature.
Feature Summary
- Designed primarily for low on-resistance analog switching applications
- Capable of operation in electronic switching circuits
- Utilizes Process 51 manufacturing technology
Applications
- Low on resistance analog switching
- Electronic switching applications
Procurement Notes
Verify the component status carefully as datasheets may reflect historical production phases. Confirm that the specific unit matches the Fairchild Semiconductor or authorized successor branding. Ensure the TO-92 package orientation aligns with design requirements. Validate that the sourcing channel provides original manufacturer documentation to guarantee authenticity and parameter accuracy.
Selection Notes
Select this component when low on-resistance analog switching is required. Verify that the maximum drain-gate voltage of 25 V and gate-source voltage of -25 V accommodate the circuit's peak voltages. Ensure the thermal environment allows for proper heat dissipation given the 350 mW power rating. Check that the IDSS range of 30 mA to 80 mA fits the specific current requirements of the application.
Part Context
The BF247A belongs to the family of N-channel JFETs historically manufactured by Fairchild Semiconductor. These devices are commonly used in analog signal paths where low distortion and high input impedance are necessary. The TO-92 packaging makes it suitable for through-hole mounting on general-purpose printed circuit boards.
Replacement Considerations
Check for equivalents from other manufacturers offering similar N-channel JFET specifications in a TO-92 package. Ensure replacement parts match the critical parameters of V(BR)GSS, IDSS range, and gfs. Verify pinout compatibility to avoid redesigning the footprint.
