onsemi MMBT3904LT1G
- Part No.:
- MMBT3904LT1G
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBT3904LT1G.pdf
- Description:
- TRANS NPN 40V 0.2A SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:429,727
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Key Analysis of the MMBT3904LT1G
MMBT3904LT1G is one of the most popular NPN SMD transistors, often used together with MMBT3906LT1G as a complementary pair in push-pull and driver stages.
As a NPN BJT, it amplifies base current to control collector current, allowing it to act as a linear amplifier or saturated switch. It is suited for logic-level control, analog pre-amplification and discrete driver functions.
The device supports typical small-signal collector currents and provides a stable hFE over a wide portion of its operating range. Low VCE(sat) improves efficiency when used as a switch in low-voltage systems such as 3.3 V or 5 V logic rails.
MMBT3904LT1G offers fast rise and fall times, making it suitable for clock circuits, digital level shifting, MOSFET gate drive pre-stages and pulse-width-modulated control signals where timing precision is important.
onsemi ensures tight process control, which results in predictable transistor behaviour across units. When mounted on a properly designed PCB layout, the SOT-23 package provides adequate thermal handling for typical small-signal power levels encountered in low-power designs.
The SOT-23 package minimizes board space while enabling automated SMT assembly. Short lead lengths reduce parasitic inductances and capacitances, improving performance for both analog and digital high-speed circuits.
Used in logic inverters, LED drivers, small relay drivers, audio pre-stages, sensor interfaces, oscillator and timing circuits, and many other general-purpose switching or amplification roles.
Technical Characteristics
| Transistor Type | NPN Small-Signal BJT |
|---|---|
| Package | SOT-23, SMT |
| Typical Collector Current Range | Small-signal range suitable for low-power loads and signal paths |
| Polarity | NPN, commonly used for low-side switching |
| DC Current Gain (hFE) | Moderate, stable gain in typical operating region |
| Saturation Voltage | Low VCE(sat), improving conduction efficiency in switching roles |
| Switching Speed | Fast switching for digital and driver applications |
| Mounting | Surface-mount, reflow compatible |
| Manufacturer | onsemi |
Pinout
Standard SOT-23 pin assignment for MMBT3904LT1G:
1 – Base
2 – Emitter
3 – Collector
Package & Mechanical Dimensions
The SOT-23 package is widely supported by PCB manufacturers and assembly houses. Using onsemi's recommended pad layout, solder mask and stencil design helps achieve robust solder joints and reliable high-volume manufacturing performance.
Application Fields
Used in logic inverters, discrete gates, level shifters and timing circuits.
Suitable for driving LEDs, small relays, MOSFET gates and other low-power loads.
Applied in audio pre-amps, sensor interfaces, waveform shaping and filtering stages.
Works as the NPN complement to MMBT3906LT1G in push-pull, driver and amplifier circuits.
Equivalent Devices & Manufacturer
Equivalent NPN small-signal transistors include generic 2N3904 variants and other SOT-23 NPN BJTs with similar Ic, Vceo and gain characteristics. When selecting drop-in replacements, verify both electrical ratings and footprint compatibility.
onsemi provides a broad portfolio of discrete semiconductors with proven reliability in automotive, industrial, computing and consumer applications. The MMBT3904LT1G is a staple device in many long-life, high-volume designs due to its stable characteristics and assured supply.
Disclaimer
- Specifications
- FAQ
- Product Comparison
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 200 mA
- Voltage - Collector Emitter Breakdown (Max):
- 40 V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 5mA, 50mA
- Current - Collector Cutoff (Max):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 10mA, 1V
- Power - Max:
- 300 mW
- Frequency - Transition:
- 300MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
1. How to order MMBT3904LT1G on DeepFinds Electronics?
Currently, DeepFinds Electronics only provide peer-to-peer order processing. While you submit the RFQ, our professional agent will contact you with the competitive prices in the global market, and our agent will prompt you to finish the order if you accept our offers.
2. How does DeepFinds Electronics guarantee that MMBT3904LT1G is from the original manufacturer or authorized agents?
We have a professional and experienced quality control team to strictly verify and test the MMBT3904LT1G. All suppliers must pass our qualification reviews before they can publish their products including MMBT3904LT1G on DeepFinds Electronics; we pay more attention to the channels and quality of MMBT3904LT1G products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
3. Are the MMBT3904LT1G price and inventory displayed accurate?
The price and inventory of MMBT3904LT1G fluctuates frequently and cannot be updated in time, it will be updated periodically within 24 hours. And, our quotation usually expires after 5 days.
4. What forms of payment are accepted?
Wire Transfer, PayPal, Alipay, Wechat, Credit Card, Western Union, MoneyGram, and Escrow are all acceptable.
Warm Tips: Some orders in certain payment forms may require handling fee.
5. How is the shipping arranged?
Customers can choose industry-leading freight companies, including DHL, UPS, FedEx, TNT, and Registered Mail. Shipping insurance is also available.
Once your order has been processed for shipment, our salesperson will send you an email advising you of the shipping status and tracking number.
Warm Tips: It may take up to 24 hours for the carriers to display tracking information. Usually, express delivery takes 3-5 days, and registered mail takes 25-60 days.
6. What is the process for return or replacement of MMBT3904LT1G?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the MMBT3904LT1G we delivered, we will accept the replacement or return of the MMBT3904LT1G only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of MMBT3904LT1G.
(3)The PartNo is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
7.How to contact us to get technical supports, such as MMBT3904LT1G pin diagram, MMBT3904LT1G datasheet?
If you need any after-sales service, please do not hesitate to contact us.
| Image |  |
| Part Number | MMBT3904LT1G |
| Manufacturer | onsemi |
| Series | - |
| Package/Case | TO-236-3, SC-59, SOT-23-3 |
| Packaging | Tape & Reel (TR) |
| Product Status | Active |
| Transistor Type | NPN |
| Current - Collector (Ic) (Max) | 200 mA |
| Voltage - Collector Emitter Breakdown (Max) | 40 V |
| Vce Saturation (Max) @ Ib, Ic | 300mV @ 5mA, 50mA |
| Current - Collector Cutoff (Max) | - |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 100 @ 10mA, 1V |
| Power - Max | 300 mW |
| Frequency - Transition | 300MHz |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Supplier Device Package | SOT-23-3 (TO-236) |
