Title: 2x FN12 Refrigerator Gated Door Light Switch NC/NO For Homa LG Haier Midea Fix

Designed for using in a refrigerator as a light switch, turning “on” when the door is opened
Switch is normally on until the activator is depressed; or pushed down by closing the door
For mounting in a metal panel
Can be used in “dead mans” switch applications
Applicable for alarm systems, hood up indicator switch, etc

Selagi ia kelihatan sama atau serupa, ia boleh digunakan untuk peranti anda!

The Number and Characters on the Unit Have No Practical Significance,Just For Reference!

Voltage: 0-250 V
Switching capacity: 0.5A

3 Pins: NC,NO,COM, Can be used as the 2 Pins ones

NO=NORMAL OPEN
NC=NORMAL CLOSED
COM=COMMON

2x Universal 2 or 3 Pins FN12 Refrigerator Door Light Lamp Gated Switch For Homa Siemens LG Galanz Haier Fridge etc.

Two ways to use: Door Open,Light On or Door Closed,Light On.

2 ways to use according to your wiring (two terminals) method:

NC: Door Open, Light On
NO: Door Closed, Light On

Brief explanation of NC and NO:

When discussing switches, NC and NO refer to the two fundamental states of their electrical contacts:

1. NO (Normally Open)

• Meaning: In its default, unactuated state, the switch’s contacts are open, meaning the circuit is broken (off).
• How it works: The circuit only becomes closed (on) when you operate the switch (e.g., press a button, flip a toggle).
• Common uses:
  • Start buttons: Most “start” buttons are NO. Pressing it completes a circuit to begin an operation.
  • Doorbells: A classic example where pressing the button completes the circuit to ring the bell.

2. NC (Normally Closed)

• Meaning: In its default, unactuated state, the switch’s contacts are closed, meaning the circuit is complete (on).
• How it works: The circuit becomes open (off) only when you operate the switch (e.g., press an emergency stop button, open a safety gate).
• Common uses:
  • Emergency stop buttons: These are typically NC. When activated, they break the circuit, immediately stopping machinery for safety.
  • Safety interlocks: For instance, a switch on a machine’s guard door might be NC. If the door isn’t properly closed, the circuit is open, preventing the machine from operating.

Key Difference Summarized:

• NO (Normally Open): Open by default, closes when operated.
• NC (Normally Closed): Closed by default, opens when operated.

Understanding these terms is crucial for anyone working with electrical circuits and control systems, as they define how a switch functions in its resting state and when activated.