Q4008DH4TP

Thyristors - TRIACs

The Q4008DH4TP is a Thyristor (also known as a Triode AC Switch) made using a 4-layer Silicon controlled rectifier. It is designed for use in applications that require high reliability switching such as alternative motor starter relays.

The TRIACs (Triode for Alternate Current Switch) works on the principle of 2 Thyristor circuits connected in opposite direction and triggered at the same time (simultaneous operation) from a single trigger source. This property allows it to control the current flow in both directions, making it ideal for a wide range of AC applications. The Q4008DH4TP is especially suitable for applications with medium power AC switching needs as it can hold continuous currents up to 8A.

The Q4008DH4TP is designed to offer an economical solution for controlling single phase AC power for equipment and industrial control systems, varying the speed of AC motors, producing stepper motor drives, and for industrial process control. With its compact size, it offers an economical solution for a wide range of applications including lighting control and electrical motors. Its on-state voltage drop is relatively low at 0.95V, which allows for maximum switching power from the TRIAC.

The Q4008DH4TP is specially designed for high-temperature applications and is resistant to short current piling-up in situations where frequent switching is required due to its fast trigger signal turn-on time and low surplus gate current. The gate control has a very low “on” time of 11ns and “on” time of 4ns, making it effective for use in high-efficiency AC power control circuits.

The TRIAC\'s low gate current requirements and its extended junction temperature rating make it ideal for a large range of applications such as motor control, lamp dimming, relay drives and process control applications. This also makes it suitable for use in electronic and industrial appliances such as LED drivers and solar cell inverters.

The use of a Thyristor in a TRIAC provides fast switching and high power handling, making it ideal for overload protection, AC pulse width modulation, and controlling AC speed and power. It can be used for controlling the power of heating elements and short-term current overload protection.

The Q4008DH4TP has been tested for safety, temperature and operating conditions, ensuring it meets the intended use under all types of stress, providing reliable operation and improved lifetime. It also meets UL, VDE, and EN/IEC standards and certifications.

In conclusion, the Q4008DH4TP TRIAC is a cost-effective, reliable and compact solution for controlling AC power in a range of applications. It is designed to safely handle medium power, provides efficient switching and low on-state voltages, and has good temperature and safety ratings.