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The diac diode, short for diode alternating current, is a two-terminal device that symmetrical switches On and Off when the applied voltage exceeds its breakover voltage threshold. It functions as a trigger device that can transition power between the positive and negative half cycles of alternating current. With this capability, diac diode types find extensive usage in a variety of electronic circuits.
| Product | Marketing Status | Configuration | VRRM(V) max. | IF(A) max. | VF (V) max | IFSM(A) max. | IR(uA) max. | trr (ns) max | TJ(°C) max. | TJ(°C) min. | ECCN(US) | Compliance | |
| DB3 | Active | 125 | -55 | EAR99 | | ||||||||
| DB3 (G) | not for new design | 125 | -40 | EAR99 | |||||||||
| DB3M | not for new design | 125 | -40 | EAR99 | |||||||||
| DB3S | Active | 125 | -55 | EAR99 | | ||||||||
| DB4 | Active | 125 | -55 | EAR99 | | ||||||||
| DB4 (G) | not for new design | 125 | -40 | EAR99 | |||||||||
| DB4M | not for new design | 125 | -40 | EAR99 | |||||||||
| DB4S | Active | 125 | -55 | EAR99 | | ||||||||
| SODDB3 | Active | 125 | -40 | EAR99 | | ||||||||
| SODDB3T | Active | 125 | -40 | EAR99 | |
AC Power Control:
Triac Diode: Extensively used in applications involving the regulation of power levels, such as heating devices, motor controllers, and light dimmers. Their ability to control current throughout the entire AC cycle enhances both efficiency and flexibility, making them ideal for precise power management.
Diac Diode: Primarily used as a triggering device for triacs. Diacs diode help in providing a consistent and reliable trigger signal, ensuring that the triac switches on at the correct point in the AC cycle. They are not used directly for power control but are crucial in the triggering mechanism.
AC Switching:
Triac Diode: Excels in applications that require switching AC loads, including motors, heaters, and solenoids. These devices provide reliable and efficient performance, ensuring seamless operation. Their bidirectional switching capability allows them to handle AC loads effectively.
Diac Diode: Used to trigger triacs in AC switching applications. Diodes for sale ensure that the triac receives a sharp and consistent trigger pulse, which is essential for reliable switching of AC loads. They do not switch loads directly but play a vital role in the switching process.
Phase Control:
Triac Diode: Offers precise phase control, which is essential for optimal energy management in devices such as heating elements and lighting systems. By adjusting the phase angle at which the triac conducts, it is possible to control the amount of power delivered to the load, resulting in improved energy efficiency.
Diac Diode: Facilitates phase control by providing a stable trigger signal to the triac. The diac diode ensures that the triac is triggered at the correct phase angle, enabling precise control over the power delivered to the load. While the diac itself does not control the phase, it is integral to the phase control process.
