| Manufacturer | Part Number | Description |
|---|---|---|
KODENSHI (Kodenshi AUK Group)
| KK4021B | 8-Bit Shift Register High-Voltage Silicon-Gate CMOS |
Toshiba
| K4021 | 2SK4021 |
| Unknown Manufacturer | STK4021 | (STK4023 / STK4025) 6.5 TO 25E MIN AF POWER AMP |
|
Toshiba
| 2SK4021 | N-Channel MOSFET |
