triac: meaning, definition, pronunciation and examples
Very LowTechnical / Specialized
Quick answer
What does “triac” mean?
A solid-state electronic component used as a bidirectional switch for alternating current (AC).
Audio
Pronunciation
Definition
Meaning and Definition
A solid-state electronic component used as a bidirectional switch for alternating current (AC).
A type of thyristor that can conduct current in both directions when triggered, commonly used in AC power control applications like light dimmers and motor speed controllers.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage between British and American English. The term is standardized internationally in technical contexts.
Connotations
Purely technical, functional, and precise with no additional connotative differences.
Frequency
Equally low-frequency and highly specialized in both varieties.
Grammar
How to Use “triac” in a Sentence
The [noun] uses a triac to control the [device].A triac controls the [AC load] by [method].Vocabulary
Collocations
Examples
Examples of “triac” in a Sentence
adjective
British English
- triac-based controller
- triac switching characteristics
American English
- triac-controlled dimmer
- triac drive circuit
Usage
Meaning in Context
Business
Used in procurement, specifications, and technical sales for electrical components.
Academic
Found in electrical engineering textbooks, research papers, and course materials on power electronics.
Everyday
Virtually never used in everyday conversation outside of specific hobbies like electronics.
Technical
Central term in circuit design, device datasheets, and application notes for AC power control.
Watch out
Common Mistakes When Using “triac”
- Misspelling as 'triack' or 'tryac'.
- Confusing it with a 'diac' (trigger device) or a 'thyristor' (SCR, which is unidirectional).
- Using it as a general term for any switch.
FAQ
Frequently Asked Questions
No. A triac is a solid-state semiconductor switch with no moving parts, while a relay is an electromechanical switch. Triacs are faster and quieter.
No, a triac is designed specifically for alternating current (AC). It will latch on if used with DC and likely not turn off.
It means the triac can conduct electrical current in both directions through its main terminals, which is essential for controlling AC that constantly reverses direction.
Commonly found in household appliances like fan speed controllers, light dimmers, hand power tools, and electric heater controls.
A solid-state electronic component used as a bidirectional switch for alternating current (AC).
Triac is usually technical / specialized in register.
Triac: in British English it is pronounced /ˈtraɪæk/, and in American English it is pronounced /ˈtraɪˌæk/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Trigger the triac”
- “The triac is firing”
Learning
Memory Aids
Mnemonic
Think: TRIode for AC. A three-terminal device (TRI) for controlling Alternating Current (AC).
Conceptual Metaphor
A traffic light for electricity that can stop or allow flow in both directions.
Practice
Quiz
What is the primary function of a triac?