Parts · Transistors
BF245B
Si N-ch JFET TO-92 TH.4 circuits use 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 |
|---|---|---|---|---|
| BF245B | 15 mA | 30 V | 0.35 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| 2N5245 | 1 V | 15 mA | 30 V | 0.35 W | 1 |
| 2N5459 | 4.5 V | 16 mA | 25 V | 0.625 W | 5 |
| 2SK117 | 14 mA | 50 V | 0.3 W | 42 | |
| 2SK184 | 14 mA | 50 V | 0.2 W | 9 | |
| BF256B | 30 V | 13 mA | 30 V | 0.35 W | 1 |
| MPF102 | 7.5 V | 20 mA | 25 V | 0.35 W | 18 |
| PF5102 | 1.6 V | 20 mA | 40 V | 0.625 W | 40 |
| 2SK304 | 4 V | 20 mA | 30 V | 0.15 W | 1 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| 2N5950 | 5 V | 15 mA | 30 V | 0.36 W |
| J210 | 3 V | 15 mA | 25 V | 0.35 W |
| 2N5951 | 4.5 V | 13 mA | 30 V | 0.36 W |
| 2N5949 | 6 V | 18 mA | 30 V | 0.36 W |
| 2SK330 | 14 mA | 50 V | 0.2 W | |
| 2N5555 | 1 V | 15 mA | 25 V | 0.35 W |
| 2SK209 | 14 mA | 50 V | 0.15 W | |
| 2SK2145 | 14 mA | 50 V | 0.3 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Analogguru FET Booster BF245B | — | Boost | Experimentalists Anonymous | — | 1 | — | 11 | |
| JFET Compressor BF245B · J113 · LM358 · NE5534 | — | Compressor | Moody Sounds | — | 3 | kr895.00 | 60 | |
| McGillwell FET Booster Vero8×8 Unverified BF245B McGillwell FET Booster | McGillwell FET Booster | Boost | Tagboard Effects | — | 1 | — | 6 | |
| Tube-Town Effects Vero17×16 Unverified 7812 · BF245B Tube Town Effects | Tube Town Effects | Boost | Tagboard Effects | — | 3 | — | 23 |