Overview
The BC858B is a general-purpose PNP bipolar junction transistor (BJT) manufactured by Infineon Technologies. This transistor is designed for a wide range of applications, particularly in audio frequency (AF) input stages and driver circuits. It is known for its high current gain, low collector-emitter saturation voltage, and low noise characteristics between 30 Hz and 15 kHz. The BC858B is packaged in a SOT-23-3 case, making it suitable for surface mount technology (SMT) assembly. It is also RoHS compliant and lead-free, adhering to environmental standards.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Infineon Technologies |
| Transistor Type | PNP |
| Current - Collector (Ic) (Max) | 100 mA |
| Voltage - Collector Emitter Breakdown (Max) | 30 V |
| Vce Saturation (Max) @ Ib, Ic | 650 mV @ 5 mA, 100 mA |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 220 @ 2 mA, 5 V |
| Power - Max | 250 mW |
| Frequency - Transition | 100 MHz |
| Operating Temperature | -55 ℃ ~ 150 ℃ (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | SOT-23-3 (TO-236) |
| Environmental Compliance | RoHS Compliant, Lead Free |
Key Features
- High Current Gain: The BC858B offers a high DC current gain (hFE) of 220 at 2 mA and 5 V, making it suitable for amplification and switching applications.
- Low Collector-Emitter Saturation Voltage: It has a low Vce saturation voltage of 650 mV at 5 mA and 100 mA, which reduces power losses and improves efficiency.
- Low Noise: The transistor exhibits low noise characteristics between 30 Hz and 15 kHz, making it ideal for audio frequency applications.
- Complementary Types: The BC858B has complementary NPN types such as BC847-BC850, allowing for balanced circuit designs.
- RoHS Compliant and Lead Free: The transistor is packaged in a lead-free, RoHS-compliant SOT-23-3 case, ensuring environmental compliance.
Applications
- AF Input Stages: The BC858B is well-suited for audio frequency input stages due to its low noise and high current gain characteristics.
- Driver Applications: It can be used in various driver circuits where high current gain and low saturation voltage are required.
- General Purpose Amplification: The transistor can be used in general-purpose amplification and switching circuits due to its robust specifications and reliability.
Q & A
- What is the maximum collector current of the BC858B transistor?
The maximum collector current (Ic) of the BC858B transistor is 100 mA.
- What is the maximum collector-emitter breakdown voltage of the BC858B?
The maximum collector-emitter breakdown voltage is 30 V).
- What is the typical DC current gain (hFE) of the BC858B transistor?
The typical DC current gain (hFE) is 220 at 2 mA and 5 V).
- What is the operating temperature range of the BC858B transistor?
The operating temperature range is -55 ℃ to 150 ℃ (TJ)).
- Is the BC858B transistor RoHS compliant?
Yes, the BC858B transistor is RoHS compliant and lead-free).
- What is the package type of the BC858B transistor?
The BC858B transistor is packaged in a SOT-23-3 (TO-236) case).
- What are some potential applications of the BC858B transistor?
Potential applications include AF input stages, driver applications, and general-purpose amplification and switching circuits).
- Does the BC858B have complementary NPN types?
Yes, the BC858B has complementary NPN types such as BC847-BC850).
- What is the maximum power dissipation of the BC858B transistor?
The maximum power dissipation is 250 mW).
- What is the transition frequency of the BC858B transistor?
The transition frequency is 100 MHz).
