Parts · Transistors
BF247
Si N-ch JFET TO-92 TH.3 circuits use this part.
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 |
|---|---|---|---|---|
| BF247A | 4 V | 80 mA | 25 V | 0.35 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| J108 | 80 mA | 25 V | 0.4 W | 1 | |
| J310 | 50 mA | 25 V | 0.4 W | 1 | |
| J113 | 50 mA | 35 V | 0.4 W | 88 | |
| J112 | 50 mA | 35 V | 0.4 W | 24 | |
| J111 | 50 mA | 35 V | 0.4 W | 17 | |
| SST201 | 50 mA | 40 V | 0.36 W | 1 | |
| 2N3956 | 4 V | 50 mA | 50 V | 0.25 W | 1 |
| 2N3954 | 4 V | 50 mA | 50 V | 0.25 W | 1 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| PN4861 | 4 V | 80 mA | 30 V | 0.625 W |
| BSR58 | 80 mA | 40 V | 0.25 W | |
| 2SK1740 | 75 mA | 40 V | 0.25 W | |
| 2SK1747 | 75 mA | 40 V | 0.4 W | |
| 2SK125 | 100 mA | 35 V | 0.3 W | |
| 2SK2171 | 100 mA | 40 V | 0.4 W | |
| 2SK937 | 100 mA | 40 V | 0.3 W | |
| BSR57 | 100 mA | 40 V | 0.25 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| PQ3b Parametric Equalizer BC550 · BF247 · TL074 Boss PQ-3B Bass Parametric Equalizer | Boss PQ-3B Bass Parametric Equalizer | EQ / Filter | Guitar-Electronics.eu | — | 4 | €9.75 out | 75 | |
| PQ4 Parametric Equalizer BC550 · BF247 · TL074 Boss PQ-4 Parametric Equalizer | Boss PQ-4 Parametric Equalizer | EQ / Filter | Guitar-Electronics.eu | — | 3 | €9.75 out | 74 | |
| RAT BF247 · OP07 ProCo RAT | ProCo RAT | Distortion | Guitar-Electronics.eu | — | 3 | €6.25 | 33 |