RC Snubber Circuit Diagram

RC absorption circuit is also known as an RC snubber circuit. It is a circuit structure in which a resistor and capacitor are connected in series and are connected in parallel with the switch. It is used to improve the voltage and current waveforms when electronic power devices are switched on and off. The RC absorption circuit module can prevent the induced electromotive force generated when the inductive load is switched on and off from causing damage to switching equipment such as relays and thyristors, prevent electromagnetic interference, and increase the anti-interference capability of the single-chip microcomputer.

Load: suitable for AC or DC 5-400V inductive load (load less than 1000W)

Resistor: 220 Ohms

Capacitor: 

• CBB22 104J630V
• 0.1uF
• 630V
• 5% tolerance

Varistor:

• AC voltage: 300V
• Rated DC voltage: 385V
• Maximum clamping voltage Vc: 775V
• Varistor case type: Disc 10mm
• Varistor type: Metal oxide varistor 
• Peak surge current @ 8/20µs: 2.5kA
• Minimum operating temperature: -40°C
• Maximum operating temperature: 105°C
• Peak energy (10/1000uS): 70J