Parts · Transistors
MPSA12
Si NPN Darlington BJT TO-92 TH.12 circuits use this part.
Datasheet · from diodes.com
Substitutes Si NPN transistor
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 | hFE min | Vce | Ic | Pc | fT |
|---|---|---|---|---|---|
| MPSA12 | 20 | 20 V | 300 mA | 0.33 W | 125 MHz |
Used on other boards here
| Part | hFE min | Vce | Ic | Pc | fT | Boards |
|---|---|---|---|---|---|---|
| 2N706A | 20 | 15 V | 200 mA | 0.36 W | 200 MHz | 2 |
| 2N5845 | 25 | 40 V | 1000 mA | 0.625 W | 300 MHz | 1 |
| 2N708 | 30 | 15 V | 200 mA | 0.36 W | 300 MHz | 2 |
| MPSA14 | 10 | 30 V | 300 mA | 0.31 W | 125 MHz | 29 |
| 2SC1175 | 40 | 45 V | 200 mA | 0.3 W | 170 MHz | 1 |
| PN100 | 40 | 35 V | 500 mA | 0.625 W | 200 MHz | 5 |
| 2N3904 | 40 | 40 V | 200 mA | 0.31 W | 300 MHz | 870 |
| 2N3568 | 40 | 60 V | 200 mA | 0.3 W | 60 MHz | 1 |
Closest by the numbers
| Part | hFE min | Vce | Ic | Pc | fT |
|---|---|---|---|---|---|
| BFS65 | 20 | 20 V | 200 mA | 0.4 W | |
| BSYP62 | 20 | 15 V | 200 mA | 0.36 W | |
| 2N921 | 20 | 20 V | 200 mA | 0.36 W | 200 MHz |
| 2SC565 | 20 | 40 V | 200 mA | 0.35 W | |
| 2N783 | 20 | 20 V | 200 mA | 0.3 W | 200 MHz |
| BSV23K | 20 | 20 V | 200 mA | 0.3 W | 200 MHz |
| BSV23L | 20 | 20 V | 200 mA | 0.3 W | 200 MHz |
| BSV23M | 20 | 20 V | 200 mA | 0.3 W | 200 MHz |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Black Arts Toneworks Badascan Vero19×17 Verified MPSA12 Black Arts Toneworks Badascan | Black Arts Toneworks Badascan | Distortion | Dirtbox Layouts | — | 4 | — | 31 | |
| Black Arts Toneworks LSTR Vero19×17 Verified MPSA12 Black Arts Toneworks LSTR | Black Arts Toneworks LSTR | Distortion | Dirtbox Layouts | — | 4 | — | 27 | |
| Black Arts Toneworks Revelation Super Lead Vero15×14 Verified MPSA12 Black Arts Toneworks Revelation Super Lead | Black Arts Toneworks Revelation Super Lead | Boost | Dirtbox Layouts | — | 3 | — | 18 | |
| Maestro Brassmaster MOJO layout Vero35×26 Unverified 2N3904 · MPSA12 Maestro Brassmaster | Maestro Brassmaster | Fuzz | Dirtbox Layouts | — | 3 | — | 41 | |
| Morley Echo Chorus Vibrato 1458 · 2N5087 · 3403 · 78L15 Morley Echo Chorus Vibrato | Morley Echo Chorus Vibrato | Vibrato / Chorus | Experimentalists Anonymous | — | 3 | — | 154 | |
| Morley Emerald echo 2N5087 · MN3102 · MN3205 · MPSA12 Morley Emerald echo | Morley Emerald echo | Delay | Experimentalists Anonymous | — | 3 | — | 89 | |
| Morley POB 1458 · 78L09 · MPSA12 · TL074 Morley POB | Morley POB | Phaser | Experimentalists Anonymous | — | 2 | — | 41 | |
| Morley sapphire flanger 3403 · CD4007 · CD4007UB · CD4047 Morley sapphire flanger | Morley sapphire flanger | Flanger | Experimentalists Anonymous | — | 3 | — | 90 | |
| Telray Autowah 1741 · LDR · MPSA06 · MPSA12 | — | Wah / Envelope | Experimentalists Anonymous | — | 2 | — | 68 | |
| Lester Fuzz MPSA12 Black Arts Toneworks LSTR · 1590B | Black Arts Toneworks LSTR | Fuzz | Fuzz Dog | 1590B | 4 | £36.00 | 47 | |
| Black Arts Toneworks LSTR Vero18×17 Verified MPSA12 Black Arts Toneworks LSTR | Black Arts Toneworks LSTR | Fuzz | Tagboard Effects | — | 4 | — | 26 | |
| Black Arts Toneworks Revelation Super Lead Vero17×13 Verified MPSA12 Black Arts Toneworks Revelation Super Lead | Black Arts Toneworks Revelation Super Lead | Distortion | Tagboard Effects | — | 3 | — | 16 |