Overview
The BF821,215 is a PNP high voltage transistor produced by Nexperia USA Inc. This transistor is packaged in a small SOT23 Surface-Mounted Device (SMD) plastic package, making it suitable for a variety of compact electronic designs. The BF821 is part of Nexperia's extensive portfolio of discrete semiconductor components, which are widely used in various industries including automotive, industrial, and consumer electronics.
Key Specifications
| Type number | Package version | Package name | Size (mm) | Channel type | P tot (mW) | V CEO [max] (V) | I C [max] (mA) | h FE [min] | T J [max] (°C) | f T [min] (MHz) | Automotive qualified |
|---|---|---|---|---|---|---|---|---|---|---|---|
| BF821 | SOT23 | SOT23 | 2.9 x 1.3 x 1 | PNP | 250 | -300 | -50 | 50 | 150 | 60 | Yes |
Additional key specifications include:
- Vce Saturation (Max) @ Ib, Ic: 800mV @ 5mA, 30mA
- DC Current Gain (hFE) (Min) @ Ic, Vce: 50 @ 25mA, 20V
- Current - Collector Cutoff (Max): 10nA (ICBO)
- Frequency - Transition: 60MHz
- Operating Temperature: 150°C (TJ)
- Mounting Type: Surface Mount
Key Features
- High Voltage Capability: The BF821 can handle a maximum collector-emitter voltage of 300V, making it suitable for high voltage applications.
- Low Current: The transistor has a maximum collector current of 50 mA, which is ideal for low current applications.
- Compact Package: The SOT23 package is small and surface-mountable, allowing for efficient use of PCB space.
- Automotive Qualified: The BF821 is qualified to the AEC-Q101 standard, ensuring reliability and performance in automotive applications.
- High Transition Frequency: With a minimum transition frequency of 60 MHz, this transistor is suitable for high-frequency applications.
Applications
The BF821 transistor is versatile and can be used in various applications, including:
- Telephony and Professional Communication Equipment: Its high voltage and low current characteristics make it suitable for telecommunication devices.
- Automotive Electronics: Qualified to AEC-Q101, it is used in automotive systems requiring high reliability and performance.
- Industrial and Consumer Electronics: It can be used in a wide range of industrial and consumer electronic devices where high voltage and low current are required.
Q & A
- What is the maximum collector-emitter voltage of the BF821 transistor?
The maximum collector-emitter voltage (V CEO) of the BF821 transistor is 300V.
- What is the maximum collector current of the BF821 transistor?
The maximum collector current (I C) of the BF821 transistor is 50 mA.
- What package type is the BF821 transistor available in?
The BF821 transistor is available in the SOT23 Surface-Mounted Device (SMD) plastic package.
- Is the BF821 transistor automotive qualified?
Yes, the BF821 transistor is qualified to the AEC-Q101 standard.
- What is the minimum transition frequency of the BF821 transistor?
The minimum transition frequency (f T) of the BF821 transistor is 60 MHz.
- What is the operating temperature range of the BF821 transistor?
The operating temperature (T J) of the BF821 transistor is up to 150°C.
- What are some common applications of the BF821 transistor?
The BF821 transistor is commonly used in telephony, professional communication equipment, automotive electronics, and various industrial and consumer electronic devices.
- How does the BF821 compare to its NPN complements?
The BF821 is a PNP transistor, and its NPN complements are the BF820 and BF822.
- What is the DC current gain (hFE) of the BF821 transistor?
The DC current gain (hFE) of the BF821 transistor is a minimum of 50 at 25mA and 20V.
- Can the BF821 transistor be used in high-frequency applications?
Yes, the BF821 transistor can be used in high-frequency applications due to its high transition frequency.
