| Manufacturer | Part Number | Description |
|---|---|---|
Toshiba
| 2SD1221 | Silicon NPN Transistor |
Kexin Semiconductor
| 2SD1221 | NPN Transistors |
Toshiba
| D1221 | 2SD1221 |
Fairchild (now onsemi)
| KSD1221 | Low Frequency Power Amplifier |
Cooper Electronic
| SD12-221 | Shielded Inductors |
Eaton
| SD12-221-R | Low profile metalized shielded drum core power inductors |
