Total posts : 45366
Good point since inductive components cause “kickback” voltages which can be clamped or suppressed st the source but even with a resistive load a switch contact will arc upon opening. This causes erosion of the contact surfaces so the intent of using a snubber is to reduce the arcing and hence reduce the mechanical damage to the switch. Placing the snubber across the load won’t prevent the arcing so it is placed across the switch.
Microswitches have small contact area and will benefit from a snubber though I have rarely seen them used unless there is high inductance in the load such as with contactors or motor starters or telephone switchgear. Larger switches don’t need them unless the design is for millions of make/break cycles such as in MRAM’s example. A home appliance or electronic device switch will not need to withstand this many cycles. For example, washing machines are designed for 12,500 cycles which is considered the end of design life for this appliance. A stereo or radio on/off switch will probably not have many more cycles than this.