Overview
The BC857AMTF is a PNP epitaxial silicon transistor manufactured by Fairchild Semiconductor, now part of ON Semiconductor. This transistor is part of the BC856-BC860 series, known for its versatility in both switching and amplifier applications. It is particularly suited for automatic insertion in thick and thin-film circuits due to its compact SOT-23 package. The BC857AMTF is notable for its low noise characteristics, making it an excellent choice for applications requiring minimal noise interference.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| VCBO (Collector-Base Voltage) | - | - | -50 | V | |
| VCEO (Collector-Emitter Voltage) | - | - | -45 | V | |
| VEBO (Emitter-Base Voltage) | - | - | -5 | V | |
| IC (Collector Current, DC) | - | - | -100 | mA | |
| PC (Collector Power Dissipation) | - | - | 310 | mW | |
| TJ (Junction Temperature) | - | - | 150 | °C | |
| TSTG (Storage Temperature) | - | -65 ~ 150 | - | °C | |
| hFE (DC Current Gain) | VCE = -5V, IC = -2mA | 110 | - | 800 | - |
| VCE (sat) (Collector-Emitter Saturation Voltage) | IC = -10mA, IB = -0.5mA | -90 | - | -300 | mV |
| VBE (sat) (Base-Emitter Saturation Voltage) | IC = -10mA, IB = -0.5mA | -700 | - | -900 | mV |
| fT (Current Gain Bandwidth Product) | VCE = -5V, IC = -10mA, f = 100MHz | - | - | 150 | MHz |
| Cob (Output Capacitance) | VCB = -10V, IE = 0, f = 1MHz | - | - | 6 | pF |
| NF (Noise Figure) | VCE = -5V, IC = -200µA, RG = 2KΩ, f = 1KHz | 1 | - | 4 | dB |
Key Features
- Compact Package: The BC857AMTF is packaged in a SOT-23 format, making it ideal for space-constrained applications.
- Low Noise: This transistor is known for its low noise characteristics, particularly in the BC859 and BC860 variants, making it suitable for applications requiring minimal noise interference.
- High Current Gain: The transistor offers a high DC current gain (hFE) ranging from 110 to 800, depending on the classification.
- Wide Temperature Range: It operates over a storage temperature range of -65°C to 150°C and a junction temperature of up to 150°C.
- Versatile Applications: Suitable for both switching and amplifier applications, making it a versatile component in various electronic circuits.
Applications
- Switching Circuits: The BC857AMTF is often used in switching circuits due to its high current gain and low saturation voltage.
- Amplifier Circuits: It is also used in amplifier circuits where low noise and high gain are required.
- Automotive Electronics: Suitable for use in automotive electronics due to its robust temperature range and reliability.
- Consumer Electronics: Commonly used in consumer electronics such as audio equipment, telecommunication devices, and other general-purpose electronic circuits.
Q & A
- What is the package type of the BC857AMTF transistor?
The BC857AMTF transistor is packaged in a SOT-23 format.
- What is the maximum collector current for the BC857AMTF?
The maximum collector current (IC) for the BC857AMTF is -100 mA.
- What is the typical DC current gain (hFE) of the BC857AMTF?
The typical DC current gain (hFE) of the BC857AMTF ranges from 110 to 800, depending on the classification.
- What is the maximum junction temperature for the BC857AMTF?
The maximum junction temperature (TJ) for the BC857AMTF is 150°C.
- What are the common applications of the BC857AMTF transistor?
The BC857AMTF transistor is commonly used in switching circuits, amplifier circuits, automotive electronics, and consumer electronics.
- What is the noise figure of the BC857AMTF transistor?
The noise figure (NF) of the BC857AMTF transistor is typically around 1 to 4 dB, depending on the frequency and operating conditions.
- Is the BC857AMTF transistor suitable for high-frequency applications?
Yes, the BC857AMTF transistor has a current gain bandwidth product (fT) of 150 MHz, making it suitable for high-frequency applications.
- What is the storage temperature range for the BC857AMTF transistor?
The storage temperature range (TSTG) for the BC857AMTF transistor is -65°C to 150°C.
- Can the BC857AMTF transistor be used in automatic insertion processes?
Yes, the BC857AMTF transistor is suitable for automatic insertion in thick and thin-film circuits.
- What is the collector power dissipation of the BC857AMTF transistor?
The collector power dissipation (PC) of the BC857AMTF transistor is 310 mW.
