Parts · Transistors
MMBF4393
Si N-ch JFET SOT-23 SMD.9 circuits use this part. Listed as: JFET, N-channel, SOT-23.
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 |
|---|---|---|---|---|
| MMBF4393 | 3 V | 30 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 |
| SST201 | 50 mA | 40 V | 0.36 W | 1 | |
| 2SK170 | 20 mA | 40 V | 0.2 W | 10 | |
| J310 | 50 mA | 25 V | 0.4 W | 1 | |
| NTE458 | 20 mA | 50 V | 0.25 W | 2 | |
| 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 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| 2N5564 | 3 V | 30 mA | 40 V | 0.65 W |
| 2N5565 | 3 V | 30 mA | 40 V | 0.65 W |
| 2N5566 | 3 V | 30 mA | 40 V | 0.65 W |
| 2SK163 | 30 mA | 50 V | 0.4 W | |
| 2SK425 | 30 mA | 50 V | 0.2 W | |
| 2N5639 | 25 mA | 30 V | 1.35 W | |
| 2SK146 | 30 mA | 40 V | 0.6 W | |
| PN4392 | 25 mA | 40 V | 0.36 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Asteria Mk. III Preamp Drive MMBF4393 Catalinbread Formula No. 55 · 125B | Catalinbread Formula No. 55 | Overdrive | Aion FX | 125B | 4 | $12.50 | 63 | |
| Ceres Preamp Drive MMBF4393 · PN2222A Catalinbread Sabbra Cadabra · 125B | Catalinbread Sabbra Cadabra | Overdrive | Aion FX | 125B | 4 | $12.50 | 67 | |
| Gaia Mk. II Preamp Drive MMBF4393 · PN2222A Catalinbread Galileo · 125B | Catalinbread Galileo | Overdrive | Aion FX | 125B | 3 | $12.50 | 63 | |
| Triton Mk. III Preamp Drive MMBF4393 Catalinbread Dirty Little Secret Mk. III · 125B | Catalinbread Dirty Little Secret Mk. III | Overdrive | Aion FX | 125B | 3 | $12.50 | 65 | |
| Tweed 55 MPF4393/MMBF4393 Catalinbread Formula No. 55 · 1590B | Catalinbread Formula No. 55 | Distortion | Fuzz Dog | 1590B | 4 | £40.80 | 50 | |
| Tweed Man Overdrive MMBF4393 · MPF4393 Catalinbread Formula 5F6 · 125B | Catalinbread Formula 5F6 | Fuzz | PedalPCB | 125B | 7 | $12.00 | 60 | |
| Celestial Screamer MMBF4393 · TL072 Ibanez Tube Screamer | Ibanez Tube Screamer | Overdrive | Sheepylove | — | 8 | €10.00 | 52 | |
| Desert Bighorn 2N3903 · MMBF4393 Animals pedal Diamond Peak Overdrive | Animals pedal Diamond Peak Overdrive | Distortion | Sheepylove | — | 6 | €10.00 out | 37 | |
| Thunder Gun Express GE NPN · MMBF4393 Apocalypse Audio Thundertone | Apocalypse Audio Thundertone | Overdrive | Sheepylove | — | 6 | €10.00 out | 42 |