Silicon Bilateral Switch (SBS): Evaluate the statement “An SBS can conduct in one direction only.” Is it true or false?

Introduction / Context:An SBS (Silicon Bilateral Switch) is a low-power triggering device used in lamp dimmers, motor controls, and as a trigger for TRIACs. Understanding whether it conducts bidirectionally is essential for AC triggering circuits.

Given Data / Assumptions:

• Device name explicitly says “bilateral”.
• Used with AC where both polarities need triggering capability.

Concept / Approach:

Bilateral devices conduct in both directions once the breakover voltage is reached in either polarity. SBS and DIAC share this fundamental property, making them attractive as symmetrical triggers for TRIACs in AC circuits.

Step-by-Step Solution:

Verification / Alternative check:

Device datasheets show symmetrical V-I curves with two breakover points of opposite polarity.

Why Other Options Are Wrong:

• “True” contradicts the bilateral characteristic and practical AC applications.

Common Pitfalls:

Confusing SBS with SCR (unidirectional) or TRIAC (bidirectional power device). SBS is a trigger element, not a power switch.

Final Answer:

False