- 2N4221A
- Thomson-csf
- Signal Transistors and Field Effect Transistors 1976
- 2N4221A
- National Semiconductor
- Pro-Electron Transistor Datasheets
- 2N4221A
- Nte Electronics, Inc.
- N-Channel Silicon JFET General Purpose Amp, Switch TO72 Type Package
- 2N4221A
- Philips Semiconductors / Nxp Semiconductors
- N-Channel Junction Field Effect Transistors
- 2N4221A
- Solitron Devices, Inc.
- Si, N-CHANNEL, RF SMALL SIGNAL, JFET, TO-72
- 2N4221A
- Thomson Semiconductors
- Telecom Integrated Circuits Data Book 1985
- 2N4221A
- Texas Instruments
- Discrete Devices 1978