Overview
The BC857A-TP is a PNP general-purpose bipolar junction transistor (BJT) manufactured by Micro Commercial Co. This transistor is part of the BC857 series, known for its versatility in various electronic applications. The BC857A-TP is packaged in a SOT-23 surface mount format, making it suitable for automatic insertion and use in compact electronic designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-Base Voltage (Vcb) | -50 | V |
| Collector-Emitter Voltage (Vce) | -45 | V |
| Emitter-Base Voltage (Veb) | -6 | V |
| Collector Current (Ic max) | 0.1 | A |
| Peak Collector Current (Icm) | 0.2 | A |
| Total Power Dissipation (Ptot) | 250 | mW |
| Operating Junction Temperature (Tj) | -150 to 150 | °C |
| Transition Frequency (ft) | 300 | MHz |
| Collector Capacitance (Cc) | 6 | pF |
| DC Current Gain (hFE) | 125 - 800 | |
| Package | SOT-23 |
Key Features
- Ideally suited for automatic insertion due to its SOT-23 package.
- Low current (max. 100 mA) and low voltage (max. 45 V) capabilities.
- Epitaxial planar die construction for reliable performance.
- Moisture sensitivity level: 1, and ESD rating: >4000 V (human body model), >400 V (machine model).
- Totally lead-free and fully RoHS compliant.
- UL flammability classification rating 94V-0.
Applications
The BC857A-TP is designed for general-purpose switching and amplification applications. It is particularly useful in:
- Switching circuits where low current and voltage are required.
- Audio frequency (AF) amplifier applications due to its high transition frequency.
- Automotive and industrial control systems where reliability and compactness are essential.
Q & A
- What is the package type of the BC857A-TP transistor?
The BC857A-TP transistor is packaged in a SOT-23 surface mount format. - What are the maximum collector-base and collector-emitter voltages for the BC857A-TP?
The maximum collector-base voltage (Vcb) is -50 V, and the maximum collector-emitter voltage (Vce) is -45 V. - What is the maximum collector current for the BC857A-TP?
The maximum collector current (Ic max) is 0.1 A. - What is the transition frequency of the BC857A-TP transistor?
The transition frequency (ft) is 300 MHz. - Is the BC857A-TP transistor RoHS compliant?
Yes, the BC857A-TP transistor is totally lead-free and fully RoHS compliant. - What are the typical applications of the BC857A-TP transistor?
The BC857A-TP is used in general-purpose switching and amplification applications, including AF amplifier circuits and automotive control systems. - What is the operating junction temperature range for the BC857A-TP?
The operating junction temperature (Tj) range is -150 to 150 °C. - What is the DC current gain (hFE) range for the BC857A-TP?
The DC current gain (hFE) range is 125 to 800. - Is the BC857A-TP suitable for automatic insertion?
Yes, the BC857A-TP is ideally suited for automatic insertion due to its SOT-23 package. - What is the total power dissipation (Ptot) of the BC857A-TP?
The total power dissipation (Ptot) is 250 mW.
