A surge protection device that reacts to voltage spikes to protect circuits.
The resistance changes and increases according to sudden overvoltage levels.

🔸 Used for over-voltage protection
🔸 Fast response to surges
🔸 Common in power and appliance circuits

A side-adjustable trimpot used for fine adjustments in tight PCB layouts.
Ideal for factory calibration and fixed-tuning purposes.

🔸 Adjusted from the side with a screwdriver
🔸 Reliable for long-term settings
🔸 Fits compact electronic designs