Thyristors - TRIACs
Triac (for “triode for alternating current”) is a solide-state three-terminal device that can conduct current through its terminals in both directions. It is a modified form of thyristor and comes with a high average current carrying capability. These are popularly used as motor speed control, lamp dimmers, and household appliance control.
BT138-600/DG,127 Application Field and Working Principle
BT138-600/DG,127 is a general purpose Triac from Derfon Electronics Corporation. This TRIAC can handle peak off-state voltages up to 600V with a current rating of 127 mA. Owing to this, this device can be used for both industrial as well as residential applications. It uses sensitive triggering capabilities which enable precise control (with current variations) when it is used with low current Triacs.
BT138-600/DG,127 works as a bilateral switch that allows current through it in both directions. Upon amplification, it is capable of triggering AlGaN (Aluminum Gallium Nitride) hemt (Hemt) memory cells. The working principle of this device is based on the fact that when a positive gate signal is applied to it, its main terminal (MT2) will be driven to negative voltage which will allow current to flow. By changing the size of the gate signal, we can control the amount of current flowing through it.
BT138-600/DG,127 is ideal for use in industrial settings, due to its high load power sensitivity. It can be used to control motor speed, as it has a fast switching capability as well as an adjustable gate signal. In addition, it is suitable for use in residential applications, as it can be used for monitoring and controlling the brightness of lights and other household appliances. It is also suitable for use in security systems, as it can detect motion in a given area.
Features of BT138-600/DG,127
- High-speed switching capability
- High current rating of 127 mA
- Peak off-state voltage up to 600V
- Wide range of temperature operating range
- Suitable for industrial as well as residential applications
- Ideal for motor speed control, light dimmers, and household appliance control
Advantages
- High current rating of 127 mA
- Peak off-state voltage up to 600V
- Ideal for motor speed control and light dimmers
- High switching capability
- Adjustable gate signal for precise control of current flow
- Suitable for industrial as well as residential applications
- Cost-efficient
Disadvantages
- Not suitable for high-power applications as it has low current rating
- A transistor must be used to amplify the gate signal before it can be used
- Can be prone to electromagnetic interference if not properly shielded
Conclusion
BT138-600/DG,127 has many uses in various industries and household applications. It is a cost-efficient and reliable device with many advantages like fast switching, adjustable gate signal and wide range of temperature operating range. Its disadvantages such as its low current rating and susceptibility to interference can be mitigated by using it in proper applications. Its wide range of uses makes it a great choice for many applications and its low cost makes it a popular option.