IP67 Normally Closed Micro Switch G303

This IP67 Normally Closed Micro Switch from the G303 series is engineered for high reliability in harsh environments. Its robust waterproof construction meets demanding conditions, featuring molded lead wires positioned downwards and a no lever pin plunger design. Ideal for appliance and industrial control applications, it delivers consistent performance with an SPST circuit configuration.

Specifications of Switch Normally Closed IP67

Ingress Protection (IP) ratings grade the degree of protection an enclosure provides against dust and water.

IP67: The first number after IP is for the part's protection against solid objects like dust and sand. This number can range from 0, meaning no protection against dust and sand. To 6, meaning 100% protection against dust and sand. The second number after IP is for the part's protection against liquids. It ranges from 0 to 8.

IP67 equipment is the most commonly found in the connectivity market. It is 100% protected against solid objects like dust and sand, and it has been tested to work for at least 30 minutes while under 15cm to 1m of water.

FAQs：

Q1: What's the difference between Normally Open (NO) and Normally Closed (NC) micro switches in cars?

A1: The key difference lies in their default state and how they respond when activated:

Normally Open (NO):

Default: Circuit is open (no current flow).

When triggered: Closes the circuit (current flows).

Examples: Used for functions that activate after a trigger, like interior lights turning on when a door opens or the horn button.

Normally Closed (NC):

Default: Circuit is closed (current flows).

When triggered: Opens the circuit (current stops).

Examples: Used for safety or fault detection, like cutting power to brake lights when the pedal isn't pressed or alerting drivers if the hood isn't fully closed.

Q2: How do Normally Closed (NC) micro switches improve safety in cars?

A2: NC switches ensure safety by staying "on" by default and shutting off only when triggered:

Brake pedal sensor:

Default: Circuit stays closed, keeping brake lights on.

Triggered: Pedal pressed → circuit opens → brake lights turn off (in some vehicle designs).

Hood/door safety interlock:

Default: Circuit closed → dashboard warning if hood/door is open.

Triggered: Hood/door closed → circuit opens → warning disappears.

Airbag collision sensor:

Triggered: During a crash, the switch opens instantly → activates airbags (used in backup safety systems).

Q3: How do I choose the right micro switch type for my car?

A3: Pick based on what the system needs and safety priorities:

Choose Normally Open (NO) for:

Functions that need power only when activated (e.g., power window buttons, engine start button).

Short-term signals (e.g., paddle shifters, windshield wiper controls).

Choose Normally Closed (NC) for:

Safety-critical systems (e.g., monitoring ABS status or seatbelt sensors).

Circuits that must stay powered by default (e.g., tire pressure sensors).