What is an RC Snubber?
A snubber is a device that is used to limit (or “snub”) voltage transients in electrical systems. In an electrical system where there is a sudden interruption of current flow, there can be a corresponding significant rise in voltage across the device.
When is a RC Snubber recommended?
When using an external relay.
Why is a RC Snubber recommended?
When you turn off the supply to a coil, such as the one within a relay that closes its contacts, it discharges a massive voltage spike many times greater than the supply voltage. When you add an RC snubber, it absorbs the energy discharged from the coil, preventing a voltage spike that could damage other devices such as cooking power circuits or weld the contacts on the switch that powered it.
Recommend RC Snubber Specs:
- Resistance: 100Ω
- Capacitance: 0.1µF
- 250 V AC