- 2N4409
- Allegro Microsystems, Inc.
- Bipolar transistor
- 2N4409
- Continental Device India Limited
- Semiconductor Device Data Book 1996
- 2N4409
- Central Semiconductor
- NPN EPOXY - SWITCHING AND GENERAL PURPOSE
- 2N4409
- Crimson Semiconductor
- Transistor Selection Guide
- 2N4409
- Fairchild Semiconductor
- Full Line Condensed Catalogue 1977
- 2N4409
- General Electric
- Semiconductor Data Handbook 1977
- 2N4409
- Micro Electronics Corporation
- 250 mA, 50 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92
- 2N4409
- National Semiconductor
- Pro-Electron Transistor Datasheets
- 2N4409
- Rohm Co., Ltd.
- 100 mA, 50 V, NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92
- 2N4409
- Semiconductors, Inc.
- Medium Power Amplifiers and Switches
- 2N4409
- Vishay Presicion Group
- NPN, Si, SMALL SIGNAL TRANSISTOR, TO-92