Overview
The BC857B is a PNP general-purpose transistor produced by Nexperia USA Inc. It is part of the BC857 series, which includes several variants such as BC857, BC857A, BC857B, and BC857C. These transistors are designed for low current and low voltage applications, making them suitable for a wide range of electronic designs.
The BC857B is packaged in a small SOT23 (TO-236AB) Surface-Mounted Device (SMD) plastic package, which is ideal for space-constrained designs. This transistor is known for its reliability, efficiency, and versatility in various applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Collector-Base Voltage (VCBO) | - | - | -50 | V |
| Collector-Emitter Voltage (VCEO) | - | - | -45 | V |
| Emitter-Base Voltage (VEBO) | - | - | -5 | V |
| Collector Current (IC) | - | - | 100 | mA |
| Peak Collector Current (ICM) | - | - | 200 | mA |
| DC Current Gain (hFE) | 220 | - | 475 | - |
| Junction Temperature (TJ) | - | - | 150 | °C |
| Ambient Temperature (Tamb) | -65 | - | 150 | °C |
| Total Power Dissipation (Ptot) | - | - | 250 | mW |
Key Features
- Low Current Capability: Maximum collector current of 100 mA, making it suitable for low-power applications.
- Low Voltage Operation: Collector-emitter voltage up to -45 V, suitable for various low-voltage circuits.
- Compact Packaging: SOT23 (TO-236AB) package, ideal for space-constrained designs.
- High Current Gain: DC current gain (hFE) ranges from 220 to 475, ensuring reliable amplification and switching performance.
- Wide Temperature Range: Operating temperature from -65°C to 150°C, making it versatile for different environmental conditions.
Applications
The BC857B transistor is widely used in various applications across different industries, including:
- Automotive: For general-purpose switching and amplification in automotive electronics.
- Industrial: In control circuits, amplifiers, and switching applications.
- Consumer Electronics: In audio equipment, home appliances, and other consumer devices.
- Mobile and Wearables: Due to its compact size and low power consumption, it is suitable for mobile devices and wearables.
- Power and Computing: In power management circuits and computing hardware.
Q & A
- What is the maximum collector current of the BC857B transistor?
The maximum collector current of the BC857B transistor is 100 mA.
- What is the maximum collector-emitter voltage for the BC857B?
The maximum collector-emitter voltage for the BC857B is -45 V.
- What package type is used for the BC857B transistor?
The BC857B transistor is packaged in a SOT23 (TO-236AB) Surface-Mounted Device (SMD) plastic package.
- What is the range of DC current gain (hFE) for the BC857B?
The DC current gain (hFE) for the BC857B ranges from 220 to 475.
- What is the operating temperature range for the BC857B transistor?
The operating temperature range for the BC857B transistor is from -65°C to 150°C.
- What are some common applications of the BC857B transistor?
The BC857B transistor is used in automotive, industrial, consumer electronics, mobile and wearables, and power and computing applications.
- How much total power can the BC857B transistor dissipate?
The total power dissipation (Ptot) for the BC857B transistor is 250 mW.
- What is the peak collector current for the BC857B transistor?
The peak collector current (ICM) for the BC857B transistor is 200 mA.
- Is the BC857B transistor RoHS compliant?
Yes, the BC857B transistor is RoHS compliant.
- Where can I find more detailed technical information and support for the BC857B transistor?
You can find detailed technical information and support on Nexperia's official website, including data sheets, SPICE models, and reflow/wave soldering profiles.
