Parts · Transistors
BF245A
Si N-ch JFET TO-92 TH.13 circuits use this part. Listed as: Transistor BF245A.
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 |
|---|---|---|---|---|
| BF245A | 6.5 mA | 30 V | 0.35 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| 2N5246 | 4 V | 7 mA | 30 V | 0.35 W | 1 |
| 2N5952 | 3 V | 8 mA | 30 V | 0.36 W | 67 |
| PN4302 | 4 V | 5 mA | 30 V | 0.625 W | 1 |
| 2N5953 | 2.5 V | 5 mA | 30 V | 0.36 W | 1 |
| 2N5457 | 2.5 V | 5 mA | 25 V | 0.625 W | 563 |
| 2N5458 | 3.5 V | 9 mA | 25 V | 0.625 W | 88 |
| J202 | 4 V | 4.5 mA | 40 V | 0.625 W | 9 |
| 2N5245 | 1 V | 15 mA | 30 V | 0.35 W | 1 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| 2N5196 | 4 V | 7 mA | 50 V | 0.5 W |
| 2N5197 | 4 V | 7 mA | 50 V | 0.5 W |
| 2N5198 | 4 V | 7 mA | 50 V | 0.5 W |
| 2N5199 | 4 V | 7 mA | 50 V | 0.5 W |
| J305 | 3 V | 8 mA | 30 V | 0.35 W |
| 2N4869 | 5 V | 7.5 mA | 40 V | 0.3 W |
| 2N5515 | 3.8 V | 7.5 mA | 40 V | 0.375 W |
| 2N5516 | 3.8 V | 7.5 mA | 40 V | 0.375 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| BJF Gate Booster Vero14×11 Verified BC549C · BF245A BJF Gate Booster | BJF Gate Booster | Boost | Dirtbox Layouts | — | 3 | — | 19 | |
| BJFe Vibra Vibe Vero30×29 Unverified 2N1711 · 78L05 · ? · BC550C BJFe Vibra Vibe | BJFe Vibra Vibe | Vibrato / Chorus | Dirtbox Layouts | — | 2 | — | 44 | |
| Mesa Boogie Mk. 1 Preamp Vero20×21 Verified BF245A Mesa Boogie Mk. 1 Preamp | Mesa Boogie Mk. 1 Preamp | Preamp / Amp-in-a-box | Dirtbox Layouts | — | 7 | — | 38 | |
| Miles Platting In-A-Box Vero25×21 Verified 2N5088 · 7660S · BF245A · ICL7660S Miles Platting In-A-Box | Miles Platting In-A-Box | Preamp / Amp-in-a-box | Dirtbox Layouts | — | 4 | — | 38 | |
| Sovtek MIG 100H Vero21×21 Verified BF245A Sovtek MIG 100H | Sovtek MIG 100H | Preamp / Amp-in-a-box | Dirtbox Layouts | — | 6 | — | 40 | |
| OKKO Dominator Perfboard Verified 7660S · 7815 · BF245A · ICL7660S OKKO Dominator · 1590BB | OKKO Dominator | Distortion | Effects Layouts (blog) | 1590BB | 6 | — | 44 | |
| Maestro Bi-phase 4558 · 741 · BF245A Maestro Bi-phase | Maestro Bi-phase | Phaser | Experimentalists Anonymous | — | 2 | — | 41 | |
| Mu-Tron Bi-Phase Phase Stage 4558 · 741 · BF245A Mu-Tron Bi-Phase Phase Stage | Mu-Tron Bi-Phase Phase Stage | Phaser | Experimentalists Anonymous | — | 2 | — | 25 | |
| Proco Rat 2 BF245A · LM308 ProCo RAT 2 | ProCo RAT 2 | Distortion | Experimentalists Anonymous | — | — | — | 27 | |
| Hum Suppressor BC547C · BF245A · LM324 1590B | — | Noise Gate | HotKits | 1590B | 3 | $7.00 | 29 | |
| Ojo Dominatrix! BF245A · IC7660SCPAZ · OPA2604 · OPA2604CP OKKO Dominator MKII · 1590BB | OKKO Dominator MKII | Distortion | PCB Guitar Mania | 1590BB | 5 | €11.90 out | 75 | |
| OKKO Dominator 7660S · 78L15 · BF245A · ICL7660S OKKO Dominator | OKKO Dominator | Distortion | Revolution Deux | — | 5 | — | 85 | |
| OKKO Dominator Vero19×26 Verified 7660S · 78L15 · BF245A · ICL7660S OKKO Dominator · 1590B | OKKO Dominator | Distortion | Tagboard Effects | 1590B | 6 | — | 44 |