Overview
The BD678AG is a plastic, medium-power silicon PNP Darlington transistor produced by onsemi. This transistor is part of a series that includes the BD676G, BD676AG, BD678G, BD680G, BD680AG, and BD682G models. It is designed for use as an output device in complementary general-purpose amplifier applications. The BD678AG is known for its high DC current gain and monolithic construction, making it suitable for a variety of power amplification tasks.
Key Specifications
| Rating | Symbol | Value | Unit |
|---|---|---|---|
| Collector-Emitter Voltage | VCEO | 60 | Vdc |
| Collector-Base Voltage | VCB | 60 | Vdc |
| Emitter-Base Voltage | VEB | 5.0 | Vdc |
| Collector Current | IC | 4.0 | Adc |
| Base Current | IB | 0.1 | Adc |
| Total Device Dissipation @ TC = 25°C | PD | 40 | W |
| Derate above 25°C | 0.32 | W/°C | |
| Operating and Storage Junction Temperature Range | TJ, Tstg | −55 to +150 | °C |
| Thermal Resistance, Junction-to-Case | RJC | 3.13 | °C/W |
Key Features
- High DC Current Gain
- Monolithic Construction
- Complementary with BD675, 675A, 677, 677A, 679, 679A, 681 models
- Equivalent to MJE 700, 701, 702, 703 models
- Pb-Free and RoHS Compliant
Applications
The BD678AG transistor is suitable for use in various general-purpose amplifier applications, particularly where high current gain and medium power handling are required. It can be used in output stages of audio amplifiers, motor control circuits, and other power amplification tasks.
Q & A
- What is the collector-emitter voltage rating of the BD678AG transistor?
The collector-emitter voltage rating of the BD678AG transistor is 60 Vdc. - What is the maximum collector current of the BD678AG transistor?
The maximum collector current of the BD678AG transistor is 4.0 Adc. - What is the thermal resistance, junction-to-case, of the BD678AG transistor?
The thermal resistance, junction-to-case, of the BD678AG transistor is 3.13 °C/W. - Is the BD678AG transistor Pb-Free and RoHS Compliant?
Yes, the BD678AG transistor is Pb-Free and RoHS Compliant. - What is the operating and storage junction temperature range of the BD678AG transistor?
The operating and storage junction temperature range of the BD678AG transistor is −55 to +150 °C. - What is the total device dissipation of the BD678AG transistor at TC = 25°C?
The total device dissipation of the BD678AG transistor at TC = 25°C is 40 W. - How does the total device dissipation derate above 25°C?
The total device dissipation derates by 0.32 W/°C above 25°C. - What are some common applications of the BD678AG transistor?
The BD678AG transistor is commonly used in output stages of audio amplifiers, motor control circuits, and other power amplification tasks. - Is the BD678AG transistor part of a complementary series?
Yes, the BD678AG transistor is part of a series that includes complementary models such as BD675, 675A, 677, 677A, 679, 679A, 681. - What is the equivalent model to the BD678AG transistor?
The BD678AG transistor is equivalent to the MJE 701 model.
