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2N3904BU NPN bipolar junction transistor, 40V collector-emitter breakdown voltage, 200mA maximum collector current, 625mW power dissipation, 300MHz transition frequency, in a TO-92-3 through-hole package.
Mfr Part #:

2N3904BU

Available from 7 distributors
Mfr Name: On Semiconductor
On Semiconductor
NPN bipolar junction transistor, 40V collector-emitter breakdown voltage, 200mA maximum collector current, 625mW power dissipation, 300MHz transition frequency, in a TO-92-3 through-hole package.
✓ Total Stock: 71,052 pcs
$ Price Range: $0.06 - $0.28

2N3904BU Available from 7 distributors

✓ Authorised
✓ Non-Authorised
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

2N3904BU Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
DC Current Gain (hFE) (Min) @ Ic, Vce
Frequency
Medical Grade
Mounting Type
Operating Temperature
Power
Storage Temperature
Supplier Device Package
Tape & Reel
Transistor Type
Vce Saturation (Max) @ Ib, Ic
Voltage
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2N3904BU Description

Short technical summary and product information.

The 2N3904BU is a general-purpose NPN bipolar junction transistor manufactured by On Semiconductor. It features a minimum collector-emitter breakdown voltage of 40V and a maximum collector current of 200mA, making it suitable for low-power switching and amplification applications.

 

Key electrical characteristics include a minimum DC current gain (hFE) of 100 at Ic=10mA and Vce=1V, and a maximum collector-emitter saturation voltage of 300mV at Ib=5mA and Ic=50mA. The device offers a typical transition frequency of 300MHz, supporting moderate-speed switching and signal amplification.

 

Housed in a TO-92-3 through-hole package, this transistor supports an operating junction temperature range of -55°C to 150°C. It is indicated as RoHS3 compliant and REACH unaffected, though these compliance statuses have not been independently verified.

2N3904BU Quick Information

Product Type: Bipolar (BJT) Transistor
Canonical Name: 2N3904BU NPN Bipolar Transistor
Subcategory: Single BJT

2N3904BU Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

2N3904BU Estimated Pricing

Qty Low High
1+ $0.28 $0.28
10+ $0.17 $0.17
100+ $0.11 $0.11
500+ $0.08 $0.08
1,000+ $0.06 $0.06

Estimated market price range - modelled values for guidance only, not live distributor offers.

2N3904BU Features

  • NPN bipolar junction transistor design.
  • 40V minimum collector-emitter breakdown.
  • 200mA maximum collector current rating.
  • 300MHz typical transition frequency.
  • TO-92-3 through-hole package.

2N3904BU Applications

  • General-purpose signal amplification circuits.
  • Low-power switching applications.
  • Driver stages in audio amplifiers.
  • Interface circuits for logic signals.

2N3904BU FAQs

6 frequently asked questions generated from this part’s specifications.
What is the collector-emitter breakdown voltage of the 2N3904BU?

40V minimum.

What is the maximum collector current rating?

200mA maximum.

What is the maximum power dissipation?

625mW maximum.

What is the operating temperature range?

-55°C to 150°C (junction temperature).

What package does the 2N3904BU come in?

Through-hole TO-92-3 package (TO-226-3, TO-92-3).

What is the RoHS compliance status?

Indicated as RoHS3 Compliant (unverified).

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