Parts · Diodes
MA856
Si Signal Diode.18 circuits use this part. Listed as: Signal diode, DO-34; Standard Diode.
Datasheet · archived copy from Panasonic; the part is discontinued and the maker no longer publishes it
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 |
|---|---|---|---|---|---|---|---|
| MA856 | 1 V @ 100 mA | 0.1 A | 35 V | 2 pF | DO-34 | 18 |
A band-switching diode (MA2C856), discontinued; Vf is only a 1 V maximum at 100 mA.
Alternatives
| Part | Vf | If max | Vr | trr | Cj | Package | Boards | Differs |
|---|---|---|---|---|---|---|---|---|
| BA282 | 1 V @ 100 mA | 0.1 A | 35 V | 1.5 pF | DO-35 | 8 | DO-35. A VHF band-switching diode; Vf is only a 1 V maximum at 100 mA. | |
| 1N456 | 1 V @ 100 mA | 0.5 A | 30 V | DO-35 | 8 | DO-35. Low-leakage 30 V glass diode (25 nA at 25 V) that clips much like a 1N4148. | ||
| MA150 | 0.95 V @ 100 mA | 0.1 A | 35 V | 10 ns | 0.9 pF | DO-35 | 13 | DO-35 |
| 1N458A | 1 V @ 100 mA | 0.5 A | 150 V | DO-35 | 2 | DO-35. Low-leakage 150 V glass diode (25 nA at 125 V). | ||
| 1S2473 | 0.92 V @ 100 mA | 0.11 A | 40 V | 1.5 ns | 1.5 pF | DO-35 | 11 | DO-35 |
| OA200 | 0.53 V @ 0.1 mA | 0.05 A | 50 V | 3 | An early silicon-alloy diode with a 0.53 V drop at 0.1 mA, close to a 1N4148. | |||
| 1N914BWS | 0.72 V @ 5 mA | 0.15 A | 75 V | 4 ns | 4 pF | SOD-323 | 2 | SOD-323. Surface-mount 1N914B in the small SOD-323 package. |
| 1N916 | 1 V @ 10 mA | 0.2 A | 100 V | 4 ns | 2 pF | DO-35 | 17 | DO-35. Lower capacitance (2 pF) version of the 1N914. |
| 1N4148 | 1 V @ 10 mA | 0.15 A | 100 V | 4 ns | 4 pF | DO-35 | 2547 | DO-35. 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 | DO-35. A 1N4148 with a tighter forward voltage spec (0.62-0.72 V at 5 mA). |
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