Parts · Transistors
MPF4393
Si N-ch JFET TO-92 TH.37 circuits use this part. Listed as: JFET transistor, N-channel; JFET, N-channel, SOT-23; TO-92 Inline Wide.
Datasheet · archived copy from Motorola; the part is discontinued and the maker no longer publishes it
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 |
|---|---|---|---|---|
| MPF4393 | 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 |
| 2N4416 | 30 V | 30 mA | 30 V | 0.3 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 |
| BF244A | 30 V | 50 mA | 30 V | 0.35 W | 8 |
| SST201 | 50 mA | 40 V | 0.36 W | 1 | |
| 2SK170 | 20 mA | 40 V | 0.2 W | 10 | |
| 2N4860 | 6 V | 20 mA | 30 V | 0.36 W | 1 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| 2N5397 | 6 V | 30 mA | 25 V | 0.3 W |
| 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 |
| 2SK663 | 5 V | 30 mA | 55 V | 0.15 W |
| 2SK187 | 40 V | 30 mA | 40 V | 0.3 W |
| 2SK163 | 30 mA | 50 V | 0.4 W | |
| 2SK425 | 30 mA | 50 V | 0.2 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Artemis Mk. II Preamp Drive MPF4393 Catalinbread SFT V2 · 125B | Catalinbread SFT V2 | Overdrive | Aion FX | 125B | 3 | $12.50 | 64 | |
| Catalinbread Dirty Little Secret RED Vero18×21 Verified MPF4393 Catalinbread Dirty Little Secret RED | Catalinbread Dirty Little Secret RED | Preamp / Amp-in-a-box | Dirtbox Layouts | — | 5 | — | 38 | |
| Catalinbread Dirty Little Secret V3 Vero18×21 Verified MPF4393 Catalinbread Dirty Little Secret Mk. III | Catalinbread Dirty Little Secret Mk. III | Preamp / Amp-in-a-box | Dirtbox Layouts | — | 5 | — | 39 | |
| Catalinbread Formula 5F6 Vero17×19 Verified MPF4393 Catalinbread Formula 5F6 | Catalinbread Formula 5F6 | Overdrive | Dirtbox Layouts | — | 5 | — | 38 | |
| Catalinbread Formula No. 55 Vero21×17 Verified MPF4393 Catalinbread Formula No. 55 | Catalinbread Formula No. 55 | Preamp / Amp-in-a-box | Dirtbox Layouts | — | 4 | — | 34 | |
| Catalinbread Galileo Mk. II Vero20×17 Unverified MPF4393 · PN2222A Catalinbread Galileo Mk. II | Catalinbread Galileo Mk. II | Overdrive | Dirtbox Layouts | — | 3 | — | 37 | |
| Catalinbread SFT II Vero18×20 Verified MPF4393 Catalinbread SFT V2 | Catalinbread SFT V2 | Distortion | Dirtbox Layouts | — | 4 | — | 35 | |
| Catalinbread Sabra Cadabra Vero20×18 Verified BC184 · MPF4393 Catalinbread Sabbra Cadabra | Catalinbread Sabbra Cadabra | Distortion | Dirtbox Layouts | — | 4 | — | 36 | |
| PedalPCB / Chuck D. Bones Biggus Dickus Vero18×18 Verified 2N5087 · LM386 · MPF4393 PedalPCB Chuck D. Bones Biggus Dickus | PedalPCB Chuck D. Bones Biggus Dickus | Distortion | Dirtbox Layouts | — | 5 | — | 34 | |
| PedalPCB / Chuck D. Bones Celestial Screamer Vero20×21 Unverified MPF4393 · TL072 PedalPCB Chuck D. Bones Celestial Screamer | PedalPCB Chuck D. Bones Celestial Screamer | Overdrive | Dirtbox Layouts | — | 7 | — | 39 | |
| PedalPCB / Chuck D. Bones Mojito Mk. 3 Vero21×24 Unverified 2N5089 · CA3130 · MPF4393 · TL072 PedalPCB Chuck D. Bones Mojito Mk. 3 | PedalPCB Chuck D. Bones Mojito Mk. 3 | Overdrive | Dirtbox Layouts | — | 6 | — | 46 | |
| PedalPCB / Chuck D. Bones Purple Dragon Fuzz Vero22×21 Unverified 2N5087 · MPF4393 · P28 · TL074 PedalPCB Chuck D. Bones Purple Dragon Fuzz | PedalPCB Chuck D. Bones Purple Dragon Fuzz | Fuzz | Dirtbox Layouts | — | 5 | — | 41 | |
| PedalPCB / Chuck D. Bones The Black Box Vero21×18 Unverified BC109C · J113 · MPF4393 PedalPCB Chuck D. Bones The Black Box | PedalPCB Chuck D. Bones The Black Box | Distortion | Dirtbox Layouts | — | 4 | — | 40 | |
| PedalPCB Mojito Overdrive Deluxe Vero21×19 Unverified CA3130 · CA3130EZ · MPF4393 · NPN SILICON PedalPCB Mojito Overdrive Deluxe | PedalPCB Mojito Overdrive Deluxe | Overdrive | Dirtbox Layouts | — | 5 | — | 40 | |
| Catalinbread Dirty Little Secret Mk. III (ish) Perfboard Verified MAX1044 · MPF4393 · TC1044 Catalinbread Dirty Little Secret Mk. III · 125B | Catalinbread Dirty Little Secret Mk. III | Preamp / Amp-in-a-box | Effects Layouts (blog) | 125B | 6 | — | 35 | |
| Catalinbread Galileo Mk. II Perfboard Verified 2N2222 · MPF4393 Catalinbread Galileo Mk. II | Catalinbread Galileo Mk. II | Overdrive | Effects Layouts (blog) | — | 3 | — | 38 | |
| Catalinbread SFT Perfboard Verified MPF4393 Catalinbread SFT | Catalinbread SFT | Overdrive | Effects Layouts (blog) | — | 4 | — | 34 | |
| Catalinbread Sabbra Cadabra Perfboard Verified BC184 · MPF4393 Catalinbread Sabbra Cadabra · 1590B | Catalinbread Sabbra Cadabra | Distortion | Effects Layouts (blog) | 1590B | 4 | — | 37 | |
| Lord of this World BC184 · MPF4393 · PN4393 Catalinbread Sabbra Cadabra | Catalinbread Sabbra Cadabra | Overdrive | Five Cats Pedals | — | 4 | £4.50 | 57 | |
| Figaro Drive - Brian May in-a-box MPF4393 Catalinbread Galileo · 1590B | Catalinbread Galileo | Overdrive | Fuzz Dog | 1590B | 3 | £40.80 | 54 | |
| Tweed 55 MPF4393/MMBF4393 Catalinbread Formula No. 55 · 1590B | Catalinbread Formula No. 55 | Distortion | Fuzz Dog | 1590B | 4 | £40.80 | 50 | |
| War Pig - Black Sabbath in a Box BC184 · MPF4393 Catalinbread Sabbra Cadabra · 1590B | Catalinbread Sabbra Cadabra | Boost | Fuzz Dog | 1590B | 4 | £42.00 | 58 | |
| Hand Of Doom BC184_ · MPF4393 Catalinbread Sabbra Cadabra · 125B | Catalinbread Sabbra Cadabra | Boost | Griffin Effects | 125B | 3 | $9.99 | 56 | |
| Sabbatical Drive BC184 · MPF4393 Catalinbread Sabbra Cadabra · 125B | Catalinbread Sabbra Cadabra | Distortion | PCB Guitar Mania | 125B | 3 | €11.90 out | 60 | |
| The Queen MPF4393 · P2N2222A Catalinbread Galileo Mk. II · 125B | Catalinbread Galileo Mk. II | Overdrive | PCB Guitar Mania | 125B | 3 | €11.90 out | 55 | |
| Bohemia 2N2222A · MPF4393 Catalinbread Galileo Mk. II · 125B | Catalinbread Galileo Mk. II | Fuzz | PedalPCB | 125B | 3 | $8.00 | 54 | |
| Covert Overdrive MPF4393 Catalinbread Dirty Little Secret Mk. III · 125B | Catalinbread Dirty Little Secret Mk. III | Fuzz | PedalPCB | 125B | 7 | $12.00 | 57 | |
| Drive 55 MPF4393 Catalinbread Formula No. 55 · 125B | Catalinbread Formula No. 55 | Fuzz | PedalPCB | 125B | 5 | $12.00 | 52 | |
| Fuchsia Fuzz 2N1308 · BC550C · MPF4393 BearFoot FX Pink Purple Fuzz · 125B | BearFoot FX Pink Purple Fuzz | Fuzz | PedalPCB | 125B | 5 | $12.00 | 44 | |
| Mojito Deluxe Overdrive (Boneyard Edition) CA3130 · CA3130EZ · MPF4393 125B | — | Fuzz | PedalPCB | 125B | 5 | $12.00 | 55 | |
| SOFTii Overdrive MPF4393 Catalinbread SFT · 125B | Catalinbread SFT | Fuzz | PedalPCB | 125B | 5 | $10.00 | 55 | |
| Sabbath Distortion BC184 · MPF4393 Catalinbread Sabbra Cadabra · 125B | Catalinbread Sabbra Cadabra | Distortion | PedalPCB | 125B | 4 | $8.00 | 60 | |
| Tweed Man Overdrive MMBF4393 · MPF4393 Catalinbread Formula 5F6 · 125B | Catalinbread Formula 5F6 | Fuzz | PedalPCB | 125B | 7 | $12.00 | 60 | |
| Catalinbread DLS MKIII Vero21×19 Verified 7660S · ICL7660SCPA · MPF4393 Catalinbread Dirty Little Secret Mk. III | Catalinbread Dirty Little Secret Mk. III | Distortion | Tagboard Effects | — | 5 | — | 42 | |
| Catalinbread Galileo MKII Vero21×17 Verified 2N2222A · MPF4393 Catalinbread Galileo Mk. II | Catalinbread Galileo Mk. II | Overdrive | Tagboard Effects | — | 3 | — | 38 | |
| Catalinbread SFT II Vero21×17 Verified MPF4393 Catalinbread SFT V2 | Catalinbread SFT V2 | Overdrive | Tagboard Effects | — | 4 | — | 33 | |
| Catalinbread Sabbra Cadabra Vero21×18 Verified BC184 · MPF4393 Catalinbread Sabbra Cadabra | Catalinbread Sabbra Cadabra | Distortion | Tagboard Effects | — | 4 | — | 40 |