Parts · Transistors
BF245C
Si N-ch JFET TO-92 TH.1 circuit uses this part.
Datasheet · from onsemi.com
Substitutes N-channel JFET
Matched on material, polarity and the limits below from the transistor parameter database. Pinouts and packages are not in that data: check the datasheet before you drop one in, and expect gain to change the sound.
This part
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| BF245C | 25 mA | 30 V | 0.35 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| J309 | 4 V | 30 mA | 25 V | 0.625 W | 8 |
| MPF102 | 7.5 V | 20 mA | 25 V | 0.35 W | 18 |
| 2N4416 | 30 V | 30 mA | 30 V | 0.3 W | 1 |
| PF5102 | 1.6 V | 20 mA | 40 V | 0.625 W | 40 |
| 2SK170 | 20 mA | 40 V | 0.2 W | 10 | |
| 2N4860 | 6 V | 20 mA | 30 V | 0.36 W | 1 |
| 2N5459 | 4.5 V | 16 mA | 25 V | 0.625 W | 5 |
| BF256C | 30 V | 18 mA | 30 V | 0.35 W | 2 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| 2N5639 | 25 mA | 30 V | 1.35 W | |
| PN4392 | 25 mA | 40 V | 0.36 W | |
| 2N4223 | 7 V | 20 mA | 30 V | 0.3 W |
| 2N4224 | 7.5 V | 20 mA | 30 V | 0.3 W |
| 2SK662 | 20 mA | 30 V | 0.15 W | |
| 2N5397 | 6 V | 30 mA | 25 V | 0.3 W |
| 2N5564 | 3 V | 30 mA | 40 V | 0.65 W |
| 2N5565 | 3 V | 30 mA | 40 V | 0.65 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Auto Volume Control BF245C · TL071 · TL072 | — | Compressor | Experimentalists Anonymous | — | — | — | 22 |