The type of switch that will shut off when the user releases it is called a "momentary switch" or specifically a "constant pressure switch." This switch remains on only while it is being pressed and immediately shuts off when released. It is also known as a push switch with a "push to make" operation, which means the circuit closes when pressed and opens once released. Another closely related concept is the "dead man's switch," which requires continuous user pressure to stay activated and turns off when released for safety reasons.

Types of switches that shut off when released:

• Momentary (constant pressure) switch: Stays on only while pressed, and turns off when released.
• Push-to-make (Normally Open) switch: Operates as a momentary switch, circuit closed only while pressed.
• Dead man's switch: A safety switch that cuts power or stops machinery when the user releases it.

These switches are commonly used in applications like doorbells, computer power buttons, drills, lawn mowers, and safety-critical equipment to ensure operation only while actively held by the user.