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Product Detailed Parameters
- Description：NCH J-FET
- Series：*
- Mfr：onsemi
- Package：Bulk
- FET Type：-
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：-
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：-
- Input Capacitance (Ciss) (Max) @ Vds：-
- Resistance - RDS(On)：-
- Power - Max：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The onsemi 2SK315F-SPA-AC is an N-channel Junction Field-Effect Transistor (JFET) designed for analog signal processing applications. It utilizes the SPA (Small Power Amplifier) through-hole package, providing a compact form factor suitable for space-constrained designs. The device operates with a drain-to-source voltage of 15 V and supports a maximum continuous drain current of 50 mA. Key electrical characteristics include a typical input capacitance of 10 pF at 5 V and a power dissipation rating of 300 mW. The component is rated for junction temperatures up to 150°C, ensuring reliable performance in various electronic circuits.
Feature Summary
- N-channel JFET technology optimized for low-noise analog applications
- Compact SPA through-hole packaging for efficient board layout
- High input impedance characteristics suitable for buffer stages
Applications
- Low-noise preamplifiers for audio and sensor signals
- Analog switches and variable resistors
- Constant-current source circuits
Procurement Notes
Verify the specific suffix AC against the manufacturer's latest datasheet to confirm pinout and electrical tolerances. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning. Check for obsolete status or lifecycle notices as availability may vary across distributors.
Selection Notes
Select this component when a small-signal N-channel JFET with low input capacitance is required in a through-hole format. Ensure the circuit design accommodates the 15 V drain-source voltage limit and 300 mW power dissipation constraints. Compare Idss variations if precise biasing is critical for the application.
Part Context
This part belongs to the 2SK series of JFETs from onsemi, historically associated with Sanyo Semiconductor before its acquisition by onsemi. The SPA package is commonly used for small-signal amplification tasks. This specific model serves as a discrete solution for analog front-end stages where low noise and high linearity are prioritized over high-power handling.
Replacement Considerations
Direct pin-compatible substitutes may include other N-channel JFETs in the SPA package such as the 2SK772F, though electrical parameters like Idss and Vgs(off) must be verified for compatibility. Cross-referencing with generic JFET equivalents requires careful evaluation of capacitance and breakdown voltages.
