Parts · Diodes
1N458A
Si Signal Diode DO-35 TH.2 circuits use this part. Listed as: Rectifier diode, DO-35.
Datasheet · from onsemi.com
Substitutes same kind
Diodes of the same kind; for clipping, the forward drop is what you hear. The figures are read off each part's datasheet (this one's from page 1), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.
This part
| Part | Vf | If max | Vr | trr | Cj | Package | Boards |
|---|---|---|---|---|---|---|---|
| 1N458A | 1 V @ 100 mA | 0.5 A | 150 V | DO-35 | 2 |
Low-leakage 150 V glass diode (25 nA at 125 V).
Alternatives
| Part | Vf | If max | Vr | trr | Cj | Package | Boards | Differs |
|---|---|---|---|---|---|---|---|---|
| 1N456 | 1 V @ 100 mA | 0.5 A | 30 V | DO-35 | 8 | Low-leakage 30 V glass diode (25 nA at 25 V) that clips much like a 1N4148. | ||
| MA856 | 1 V @ 100 mA | 0.1 A | 35 V | 2 pF | DO-34 | 18 | DO-34. A band-switching diode (MA2C856), discontinued; Vf is only a 1 V maximum at 100 mA. | |
| BA282 | 1 V @ 100 mA | 0.1 A | 35 V | 1.5 pF | DO-35 | 8 | A VHF band-switching diode; Vf is only a 1 V maximum at 100 mA. | |
| 1N4149 | 1 V @ 10 mA | 0.5 A | 100 V | 4 ns | 2 pF | DO-35 | 1 | Low-capacitance (2 pF) 1N4148-class diode. |
| 1N4148W | 0.715 V @ 1 mA | 0.3 A | 100 V | 4 ns | 2 pF | SOD-123 | 5 | SOD-123. Surface-mount 1N4148 in SOD-123. |
| 1N914 | 1 V @ 10 mA | 0.2 A | 100 V | 4 ns | 4 pF | DO-35 | 905 | Same die as the 1N4148; the B grade is specified at 0.62-0.72 V at 5 mA. |
| 1N916 | 1 V @ 10 mA | 0.2 A | 100 V | 4 ns | 2 pF | DO-35 | 17 | Lower capacitance (2 pF) version of the 1N914. |
| MA150 | 0.95 V @ 100 mA | 0.1 A | 35 V | 10 ns | 0.9 pF | DO-35 | 13 | |
| 1N4148 | 1 V @ 10 mA | 0.15 A | 100 V | 4 ns | 4 pF | DO-35 | 2547 | Vf is a 1 V maximum at 10 mA; the sheet calls the 1N914 electrically equivalent. |
| 1N4448 | 0.72 V @ 5 mA | 0.15 A | 100 V | 4 ns | 4 pF | DO-35 | 5 | A 1N4148 with a tighter forward voltage spec (0.62-0.72 V at 5 mA). |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Beta Preamp 4558 · CD4069UB · CD4069UBE · LT1054 Sunn Beta Lead · 1590BBS | Sunn Beta Lead | Overdrive | Aion FX | 1590BBS | 2 | $16.00 | 104 | |
| Moog Minimoog 2N3392 · 2N3415 · 2N4058 · 2N4303 | — | Ring Mod / Synth | Experimentalists Anonymous | — | — | — | 677 |