Parts · Transistors
MMBF5458
Si N-ch JFET SOT-23 SMD.2 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 |
|---|---|---|---|---|
| MMBF5458 | 7 V | 9 mA | 25 V | 0.35 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| J110 | 10 mA | 25 V | 0.4 W | 1 | |
| 2SK117 | 14 mA | 50 V | 0.3 W | 42 | |
| 2SK246 | 14 mA | 50 V | 0.3 W | 9 | |
| 2SK184 | 14 mA | 50 V | 0.2 W | 9 | |
| PN4393 | 5 mA | 40 V | 0.36 W | 2 | |
| 2N5246 | 4 V | 7 mA | 30 V | 0.35 W | 1 |
| MPF102 | 7.5 V | 20 mA | 25 V | 0.35 W | 18 |
| 2SK170 | 20 mA | 40 V | 0.2 W | 10 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| BFR30 | 10 mA | 25 V | 0.225 W | |
| BFT46 | 10 mA | 25 V | 0.25 W | |
| 2N5670 | 8 mA | 25 V | 0.31 W | |
| 2SK3666 | 10 mA | 30 V | 0.2 W | |
| 2SK193 | 10 mA | 20 V | 0.25 W | |
| 2SK195 | 10 mA | 20 V | 0.25 W | |
| 2SK3230 | 10 mA | 20 V | 0.2 W | |
| 2SK4027 | 10 mA | 20 V | 0.2 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| SMD RAT Perfboard Unverified LM308 · MMBF5458 SMD RAT | SMD RAT | Distortion | Effects Layouts (blog) | — | 3 | — | 34 | |
| AMT M1 preamp (SMD) 2SK208R · MMBF5458 | — | Preamp / Amp-in-a-box | PCBWay: Glory to Ukraine | — | 5 | — | 77 |