Normally open contact In the normal state (without power), the contact in the open state is called the normally open contact. Normally closed contact In the normal state (no electricity, no current flow), the contact in the closed state is called the normally closed contact. Normally open-NO (normal open) is usually a circuit disconnected state, that is, the coil is disconnected when there is no power. Normally closed-NC (normal close) is usually the circuit closed state, that is, the coil is closed when there is no electricity.
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KSD301 250V 10A Temperature Switch Thermal control
40C 45C 50C 55C 60C 65C 70C 75C 80C 85C 90C 95C 100C 105C 110C 115C 120C 125C 130C 135C 140C 145C 150C 155C
Centigrade Normal Closed Normal Open