Overview
The BC817-40W is a general-purpose NPN transistor manufactured by ON Semiconductor, not Taiwan Semiconductor Corporation, but it is widely available through various distributors. This transistor is housed in the compact SOT323 (SC70) surface-mount device (SMD) package, making it suitable for a wide range of applications where space is limited.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Collector-Emitter Voltage | VCEO | - | - | 45 | V |
| Collector-Base Voltage | VCBO | - | - | 50 | V |
| Emitter-Base Voltage | VEBO | - | - | 5.0 | V |
| Continuous Collector Current | IC | - | - | 500 | mA |
| Base Current | IB | - | - | 50 | mA |
| Power Dissipation | Ptot | - | - | 200 | mW |
| DC Current Gain (hFE) | hFE | 250 | - | 600 | - |
| Transition Frequency (fT) | fT | - | - | 100 | MHz |
| Operating Junction Temperature | TJ | -65 | - | 150 | °C |
Key Features
General Purpose NPN Transistor: Suitable for amplification and switching applications.
Compact Package: Housed in the SOT323 (SC70) SMD package, ideal for space-constrained designs.
High Current Capability: Continuous collector current up to 500 mA.
High Voltage Ratings: Collector-Emitter Voltage (VCEO) of 45 V and Collector-Base Voltage (VCBO) of 50 V.
AEC-Q101 Qualified: Suitable for automotive and other applications requiring unique site and control change requirements.
Pb-Free, Halogen Free/BFR Free, and RoHS Compliant: Environmentally friendly packaging.
High Transition Frequency: Up to 100 MHz, making it suitable for high-frequency applications.
Applications
LED Dimmers or Flashers: Can be used to control LED brightness and flashing patterns.
Switching Applications: Ideal for general-purpose switching due to its high current and voltage ratings.
Preamplifier for Power Amplifier: Can be used as a preamplifier stage in audio or other signal amplification circuits.
High Frequency Switching: Suitable for high-frequency switching applications such as modulators and demodulators for RF frequencies.
Automotive and Industrial Applications: Due to its AEC-Q101 qualification, it is suitable for use in automotive and industrial environments.
Q & A
- What is the maximum collector current of the BC817-40W transistor?
The maximum collector current is 500 mA.
- What is the maximum collector-emitter voltage (VCEO) of the BC817-40W transistor?
The maximum collector-emitter voltage is 45 V.
- What package type is the BC817-40W transistor housed in?
The transistor is housed in the SOT323 (SC70) surface-mount device (SMD) package.
- Is the BC817-40W transistor AEC-Q101 qualified?
Yes, the BC817-40W transistor is AEC-Q101 qualified, making it suitable for automotive applications.
- What is the transition frequency (fT) of the BC817-40W transistor?
The transition frequency is up to 100 MHz.
- What is the operating junction temperature range of the BC817-40W transistor?
The operating junction temperature range is from -65°C to 150°C.
- Is the BC817-40W transistor Pb-Free, Halogen Free/BFR Free, and RoHS Compliant?
Yes, the transistor meets these environmental standards.
- What are some common applications of the BC817-40W transistor?
Common applications include LED dimmers, switching applications, preamplifiers, high-frequency switching, and automotive/industrial uses.
- What is the DC current gain (hFE) range of the BC817-40W transistor?
The DC current gain (hFE) range is from 250 to 600.
- How much power can the BC817-40W transistor dissipate?
The transistor can dissipate up to 200 mW of power.
