HS Code for Diac

A Diac (Diode for Alternating Current) is classified under HS code 8541.30. This classification is governed by the technical nature of the device as a semiconductor. Heading 8541 covers diodes, transistors, and similar semiconductor devices. Subheading 8541.30 specifically groups thyristors, diacs, and triacs together, excluding photosensitive devices. A diac is a bidirectional trigger diode that conducts current only after its breakdown voltage has been exceeded. It is a passive semiconductor switch that is commonly used to trigger triacs in AC control circuits, such as light dimmers or motor speed controllers. Because it is a semiconductor device that functions as a switch rather than a simple rectifier or amplifier, it is grouped with other power-control semiconductors like thyristors rather than standard signal diodes.

Products Included

• Trigger diacs
• Silicon bilateral switches (SBS)
• Symmetrical trigger diodes
• Power control diacs for dimming circuits

Common Misclassification

Diacs are often misclassified under 8541.10, which is the code for standard diodes. While a diac is a type of diode, the HS nomenclature provides a more specific subheading (8541.30) for diacs, triacs, and thyristors. Another potential error is 8541.21 or 8541.29, which are reserved for transistors. Importers must ensure that the device is identified as a bidirectional trigger member of the thyristor family to justify the use of 8541.30.

FAQ

What is the HS code for Diac?

The HS code for a Diac semiconductor device is 8541.30.

Are Triacs and Diacs under the same HS code?

Yes, both Diacs and Triacs are classified under HS code 8541.30 as they are both part of the thyristor family of semiconductor switches.