<p>The Honeywell MT-4RV-A28 Snap Action Switch offers mounting interchangeability with BZ/BA switches. These magnetic blow-out switches are designed to switch high capacity systems. An integral magnet around the contact gap protects the contacts by deflecting the arc. A vented case allows hot arc gases to escape ensuring longer switch life. This Honeywell Switch has an extended mechanical life of up to 100,000 cycles at a 95% survival rate.</p> <p>Snap Action Switches, also known as micro switches are a kind of momentary contact switch. Snap action switches are highly sensitive switches that respond to very small movements and can rapidly change from one contact position to the other. This Snap Action Micro switch is widely used in DC motors and solenoids. </p>