Overview
The BC857AT-7-F is a PNP small signal transistor manufactured by Diodes Incorporated. This transistor is part of the BC857 series and is known for its high reliability and compliance with various environmental and automotive standards. It features an ultra-small surface mount package (SOT523) and is suitable for a wide range of applications, including switching and audio frequency (AF) amplifier circuits.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit | Test Condition |
|---|---|---|---|---|---|---|
| Collector-Base Breakdown Voltage | BVCBO | -50 | - | - | V | IC = -100µA, IE = 0 |
| Collector-Emitter Breakdown Voltage | BVCEO | -45 | - | - | V | IC = -1mA, IB = 0 |
| Emitter-Base Breakdown Voltage | BVEBO | -6 | - | - | V | IE = -100µA, IC = 0 |
| DC Current Gain (hFE) | - | 125 | 290 | 520 | - | VCE = -5V, IC = -2mA |
| Collector-Emitter Saturation Voltage (VCE(SAT)) | - | -300 | -650 | - | mV | IC = -10mA, IB = -0.5mA |
| Base-Emitter Saturation Voltage (VBE(SAT)) | - | -700 | -900 | - | mV | IC = -10mA, IB = -0.5mA |
| Frequency | - | - | - | 100 MHz | - | - |
| Collector Current (IC) | - | - | - | 100 mA | - | - |
| Power Dissipation | - | - | - | 150 mW | - | - |
| Package | - | - | - | SOT523 | - | - |
Key Features
- High Reliability: Qualified to AEC-Q101 standards for automotive applications, ensuring high reliability and performance under various conditions.
- Environmental Compliance: Totally lead-free, halogen-free, and antimony-free, making it a 'Green' device compliant with EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2), and 2015/863/EU (RoHS 3).
- Ultra-Small Package: SOT523 surface mount package, ideal for space-constrained designs.
- Complementary NPN Type: The BC847AT, BT, CT series provides a complementary NPN transistor for matching PNP/NPN pairs in circuit designs.
- Low Saturation Voltage: Low collector-emitter and base-emitter saturation voltages, which are beneficial for reducing power consumption in switching applications.
- High Frequency Capability: With a frequency of up to 100 MHz, it is suitable for high-frequency applications.
Applications
- Switching Circuits: The BC857AT-7-F is well-suited for switching applications due to its low saturation voltages and high current gain.
- Audio Frequency (AF) Amplifiers: It is ideal for use in AF amplifier circuits where high fidelity and low noise are required.
- Automotive Electronics: Given its AEC-Q101 qualification, it is suitable for use in automotive electronic systems.
- General Purpose Amplification: It can be used in various general-purpose amplification circuits where a reliable and efficient PNP transistor is needed.
Q & A
- What is the collector-emitter breakdown voltage of the BC857AT-7-F?
The collector-emitter breakdown voltage (BVCEO) is -45V.
- What is the maximum collector current of the BC857AT-7-F?
The maximum collector current (IC) is 100 mA.
- What is the frequency capability of the BC857AT-7-F?
The frequency capability is up to 100 MHz.
- Is the BC857AT-7-F RoHS compliant?
Yes, it is fully RoHS compliant and lead-free.
- What is the package type of the BC857AT-7-F?
The package type is SOT523.
- What are the typical applications of the BC857AT-7-F?
Typical applications include switching circuits, AF amplifiers, and automotive electronics.
- Does the BC857AT-7-F have a complementary NPN type?
Yes, the complementary NPN type is the BC847AT, BT, CT series.
- What is the power dissipation of the BC857AT-7-F?
The power dissipation is 150 mW.
- Is the BC857AT-7-F suitable for high-reliability applications?
Yes, it is qualified to AEC-Q101 standards for high reliability.
- What is the base-emitter saturation voltage of the BC857AT-7-F?
The base-emitter saturation voltage (VBE(SAT)) is typically between -700 mV and -900 mV.
