JANSG2N2221AUB/TR Overview
The JANSG2N2221AUB/TR is a high-performance NPN bipolar junction transistor designed for general-purpose amplification and switching applications. This transistor features a robust gain bandwidth product and moderate power dissipation, making it suitable for industrial and consumer electronics. It offers reliable switching characteristics and can handle collector currents up to 800mA with a maximum collector-emitter voltage of 40V. The device is supplied in a SOT-23 surface-mount package, facilitating easy integration into compact circuit designs. For sourcing and detailed specifications, visit IC Manufacturer.
JANSG2N2221AUB/TR Key Features
- High Collector Current Capacity: Supports up to 800mA, enabling effective switching and amplification in demanding applications.
- Moderate Voltage Rating: With a maximum collector-emitter voltage of 40V, it suits a broad range of low to medium voltage circuits.
- Compact SOT-23 Package: Facilitates space-saving PCB layouts and surface-mount assembly, improving integration efficiency.
- Low Saturation Voltage: Ensures efficient switching with minimal power loss, enhancing overall circuit performance.
- Reliable Gain Characteristics: Offers consistent DC current gain (hFE) within specified limits, ensuring predictable amplification.
- Fast Switching Speeds: Supports applications requiring quick response times, such as digital switching circuits.
- Wide Operating Temperature Range: Suitable for industrial environments where temperature stability is crucial.
JANSG2N2221AUB/TR Technical Specifications
| Parameter | Specification |
|---|---|
| Transistor Type | NPN Bipolar Junction Transistor |
| Collector-Emitter Voltage (VCEO) | 40 V |
| Collector-Base Voltage (VCBO) | 75 V |
| Emitter-Base Voltage (VEBO) | 6 V |
| Collector Current (IC) | 800 mA |
| Power Dissipation (Pd) | 350 mW |
| DC Current Gain (hFE) | 100 to 300 (at IC=150mA, VCE=5V) |
| Transition Frequency (fT) | 100 MHz (typical) |
| Package Type | SOT-23 Surface Mount |
JANSG2N2221AUB/TR Advantages vs Typical Alternatives
This device offers an optimal balance between current capacity and voltage rating, making it more versatile than many low-power alternatives. Its compact SOT-23 package ensures seamless integration in space-constrained designs, while the low saturation voltage improves energy efficiency. Compared to typical counterparts, it delivers reliable gain and fast switching speeds, enhancing overall circuit accuracy and response, essential for industrial and consumer electronic applications.
🔥 Best-Selling Products

Texas Instruments BQ24075 Linear Battery Charger IC – 5mm x 4mm QFN Package

Texas Instruments INA219 Current Sensor Module – SOIC Package, Precision Monitoring

Texas Instruments LM4041 Precision Voltage Reference – SOT-23 Package

Texas Instruments OPA2134 Audio Op Amp – Dual, High-Performance, SOIC-8 Package
Typical Applications
- General-purpose switching in consumer electronics and industrial control circuits, where efficient current handling and compact design are critical.
- Signal amplification stages in audio and low-frequency amplifier circuits requiring stable gain.
- Driver stages for relays, LEDs, and small motors in embedded systems and automation.
- High-speed switching in digital logic circuits and pulse generation due to its fast transition frequency.
JANSG2N2221AUB/TR Brand Info
The JANSG2N2221AUB/TR is part of the reputable JANSG2N series from IC Manufacturer, known for delivering reliable and cost-effective semiconductor components. This transistor is engineered to meet stringent quality standards, making it a trusted choice for engineers seeking dependable switching and amplification solutions. Its robust design and surface-mount packaging support modern manufacturing processes and diverse application needs.
FAQ
What is the maximum collector current rating for this transistor?
The transistor supports a maximum collector current of 800mA, allowing it to handle moderate power loads in switching and amplification applications safely.
🌟 Featured Products

“Buy MAX9312ECJ+ Precision Voltage Comparator in DIP Package for Reliable Performance”

QCC-711-1-MQFN48C-TR-03-1 Bluetooth Audio SoC with MQFN48C Package

0339-671-TLM-E Model – High-Performance TLM-E Package for Enhanced Functionality

1-1415898-4 Connector Housing, Electrical Wire-to-Board, Receptacle, Packaged
Can this device be used in high-frequency circuits?
Yes, with a typical transition frequency of 100 MHz, it is suitable for many high-frequency applications, including signal switching and amplification in RF and digital circuits.
What package type does this transistor come in, and why is it beneficial?
This transistor is supplied in a SOT-23 surface-mount package, which enables compact PCB layouts, automated assembly, and improved thermal performance in constrained spaces.
📩 Contact Us
What are the voltage limits to consider when using this transistor?
The maximum collector-emitter voltage is 40V, collector-base voltage is 75V, and emitter-base voltage is 6V. Staying within these limits ensures reliable operation and prevents device damage.
How does the low saturation voltage impact circuit performance?
A low saturation voltage reduces power dissipation during switching, improving efficiency and minimizing heat generation, which is beneficial for maintaining system reliability.







