2N3904 NPN Bipolar Transistor (40V, 200mA, TO-92)
Prices updated: 12 Oct 2026
Compare prices
| Store | product | Price | View in store |
|---|---|---|---|
 RAM ElectronicsCheapest | Transistor 2N3904 | 0.75 EGP | View in store |
 Makers Electronics | 2N3904 40V 625mW 100@10mA,1V 0.2A NPN TO-92 Bipolar Transistor | 0.75 EGP | View in store |
 Microohm | 2N3904 NPN Transistor | 1 EGP2 | View in store |
 UGE | 2N3904 | 3 EGP | View in store |
Price history
Lowest daily price, last 90 days
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Lowest price recorded: 0.75 EGP
About this product
The 2N3904 is a general-purpose NPN bipolar transistor in a TO-92 package, widely used in switching and amplifier circuits. It is the complement of the 2N3906 PNP transistor and suits low-power designs and student projects.
Specifications
- Transistor type
- NPN bipolar / NPN ثنائي القطب
- Collector-emitter voltage (VCE)
- 40 V / 40 فولت
- Collector-base voltage (VCB)
- 60 V / 60 فولت
- Emitter-base voltage (VEBO)
- 6 V / 6 فولت
- Continuous collector current (IC)
- 200 mA / 200 مللي أمبير
- DC current gain (hFE)
- 100 at 10 mA, 1 V (max 300) / 100 عند 10 مللي أمبير و1 فولت (الحد الأقصى 300)
- Power dissipation
- 625 mW / 625 مللي واط
- Package
- TO-92 / TO-92
Frequently asked questions
What is the price of 2N3904 NPN Bipolar Transistor (40V, 200mA, TO-92) in Egypt?
2N3904 NPN Bipolar Transistor (40V, 200mA, TO-92) currently costs between 0.75 and 3 EGP across 4 offers in Egypt.
Where can I buy 2N3904 NPN Bipolar Transistor (40V, 200mA, TO-92) in Egypt?
2N3904 NPN Bipolar Transistor (40V, 200mA, TO-92) is available from RAM Electronics, Makers Electronics, Microohm, and UGE. Compare the offers above to find the best price.
How do I drive a relay or LED from a microcontroller with the 2N3904?
Connect the microcontroller pin to the base through a resistor, place the load between the supply and the collector, and tie the emitter to ground. Size the base resistor for your load so the transistor switches fully on, and keep the collector current within 200 mA. For relays, add a flyback diode across the coil.
Can the 2N3904 replace the 2N2222?
For low-current circuits, yes, since both are general-purpose NPN parts in TO-92. The 2N3904 is rated for 200 mA, compared with 600 mA for the 2N2222, so do not substitute it in circuits that draw more than 200 mA.
