DIAC terminal nomenclature and symmetry A DIAC (diode for alternating current) has two terminals named “anode” and “cathode.” Is this statement correct?

Introduction / Context:
DIACs are bidirectional trigger devices commonly used to fire TRIACs and for symmetrical triggering in AC control circuits. Clarifying their terminal naming helps avoid confusion in design and wiring.

Given Data / Assumptions:

• Standard DIAC structure is symmetrical.
• Unlike a conventional diode, it conducts in both directions after its breakover voltage is reached.

Concept / Approach:
Because a DIAC is symmetrical and intended for bidirectional conduction, its terminals are not designated anode and cathode. Instead, they are often labeled MT1 and MT2 or simply terminal 1 and terminal 2, indicating interchangeability.

Step-by-Step Solution:
Identify whether the device enforces a preferred polarity: DIAC does not.Terminal naming should not imply polarity; therefore “anode/cathode” is inappropriate.Conclude the statement is false.

Verification / Alternative check:
Reference DIAC datasheets show symmetrical V-I characteristics and interchangeable terminals (no anode/cathode assignment).

Why Other Options Are Wrong:
True (A): Incorrect; DIAC is bidirectional and symmetric.
Polarity-dependent (C/D): Misconception; DIAC breakover is similar in both directions.

Common Pitfalls:
Confusing DIAC with TRIAC or with unidirectional thyristors where anode/cathode naming is appropriate.

Final Answer:
False