Details

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BUY 2N3904 https://www.utsource.net/itm/p/12598405.html

Parameter	Symbol	Min	Typ	Max	Unit
Collector-Emitter Voltage	VCEO	-	40	-	V
Collector-Base Voltage	VCBO	-	60	-	V
Emitter-Base Voltage	VEBO	-	6	-	V
Collector Current	IC	-	200	-	mA
Base Current	IB	-	5	-	mA
DC Current Gain	hFE	10	300	-	-
Transition Frequency	fT	-	300	-	MHz
Power Dissipation	PT	-	625	-	mW
Storage Temperature Range	TSTG	-55	-	150	掳C
Operating Junction Temperature	TJ	-65	-	200	掳C

Instructions for Use:

1. Mounting:

   • Ensure proper heat dissipation by mounting the 2N3904 on a suitable heatsink if operating near its maximum power dissipation.
   • Avoid mechanical stress on the leads, as excessive bending can damage the transistor.

2. Biasing:

   • Use appropriate biasing circuits to ensure the transistor operates within its safe operating area (SOA).
   • For linear applications, use negative feedback to stabilize the operating point.

3. Protection:

   • Include a base resistor to limit the base current and prevent damage due to excessive current.
   • Use a flyback diode across inductive loads to protect against voltage spikes.

4. Storage:

   • Store the 2N3904 in a dry environment to prevent moisture damage.
   • Handle with care to avoid static discharge, which can damage the device.

5. Testing:

   • Use a multimeter or transistor tester to verify the functionality of the 2N3904 before installation.
   • Check for continuity between the base, collector, and emitter to ensure there are no short circuits.

6. Soldering:

   • Use a soldering iron with a temperature not exceeding 300掳C to avoid thermal damage.
   • Solder quickly to minimize exposure to high temperatures.

7. Applications:

   • The 2N3904 is suitable for general-purpose amplification, switching, and low-power signal processing applications.
   • It can be used in audio circuits, logic gates, and other small-signal applications.

(For reference only)