A push-to-make switch returns to its normally open (off) position when you release the button, this is shown by the brackets around ON. This is the standard doorbell switch.

Specifications:

• Switch type: push-button
• Stable positions number: monostable
• Actuator colour: Red
• Leads: for soldering, solder lugs
• Max. contact resistance: 20mΩ
• AC contacts rating (at resistance load): 1 A / 250 V
• Switching method: OFF-(ON)
• Electrical life: 50000cycles
• Body colour: black