The 201S42E221 from Johanson Technology is a multilayer ceramic capacitor (MLCC) rated at 220 picofarads (pF) and capable of handling up to 200 volts. These components are widely used in various electronic circuits, particularly in filtering, coupling, and decoupling applications. If you're working on high-frequency circuits or power supply filtering, these MLCCs are a go-to choice due to their compact size and reliable performance.

One thing worth noting is their excellent capacitance stability over temperature, which makes them ideal for precision applications. Engineers tend to reach for these when they need a small footprint component that can handle a decent voltage and maintain stable performance across a range of temperatures. Another practical benefit is their robustness against mechanical stress, which is crucial in devices that might experience vibration or other physical shocks. Overall, the 201S42E221 offers a balanced mix of capacitance value, voltage rating, and reliability, making it a staple in many electronic designs.