- Datasheet Download Datasheet
- Stock & Prices $ Price & Stock for 2N4401
- Part Number 2N4401
- Manufacturer onsemi
- Pin Count 3
- Part Category Transistor BJT NPN
- Package Category Other
- Footprint Name Other - TO−92 (TO−226) CASE 29−11 ISSUE AM_2024
- Released Date Feb 3, 2024
- Last Modified Date Jul 23, 2025 1:58 PM UTC
- Pinout / Pin List Click Here (Member Only)
2N4401 Details
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Manufacturer Part Number:
2N4401
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Part Life Cycle Code:
Obsolete
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ECCN Code:
EAR99
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Manufacturer:
onsemi
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YTEOL:
0
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JESD-609 Code:
e0
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Peak Reflow Temperature (Cel):
235
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Qualification Status:
Not Qualified
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Terminal Finish:
TIN LEAD
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Time@Peak Reflow Temperature-Max (s):
30
2N4401 Frequently Asked Questions (FAQs)
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The maximum safe operating temperature for the 2N4401 is 150°C, as specified in the datasheet. However, it's recommended to derate the power dissipation to ensure reliable operation.
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While the 2N4401 can be used as a switch, it's not ideal for high-frequency applications due to its relatively high transition frequency (fT) of 250 MHz. For high-frequency switching, consider using a transistor with a higher fT, such as the 2N5551.
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To ensure the 2N4401 is fully saturated, apply a base current that is at least 1/10th of the collector current. Additionally, ensure the base-emitter voltage (VBE) is sufficient to drive the required collector current. A general rule of thumb is to use a VBE of at least 0.7V.
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The maximum collector current the 2N4401 can handle is 500mA, as specified in the datasheet. However, it's essential to consider the power dissipation and thermal management to ensure reliable operation.
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While the 2N4401 can be used in a linear amplifier application, it's not the most suitable choice due to its relatively low current gain (hFE) of 40-120. Consider using a transistor with a higher hFE, such as the 2N3904, for linear amplifier applications.
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