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A Normally Open (NO) switch is an electrical component designed to keep the circuit open by default, allowing current to flow only when the switch is triggered or activated. This type of switch is commonly used in applications where power is required intermittently, such as in industrial machinery controls, lighting systems, and alarm circuits.
CDOE, with over 21 years of expertise in manufacturing switches, offers a wide range of high-quality NO switches that are durable, reliable, and certified by international standards such as UL, CE, TUV, and CCC.
How Do Normally Open Switches Work?
The operation of a Normally Open switches is based on a simple mechanism: when the switch is at rest, the circuit remains open, preventing current flow. Once the switch is activated—whether through pressing, rotating, or other mechanisms—the circuit closes, allowing electricity to flow and perform the desired function.
Key Features of CDOE’s NO Switches:
- Voltage Compatibility: Suitable for low-voltage (6V, 12V, 24V) and high-voltage (220V) systems.
- Current Ratings: Options available for 5A, 10A, and 20A to meet diverse application needs.
- Durability: Mechanical lifespan of up to 10,000 cycles ensures long-term reliability.
- Certifications: UL, CE, TUV, and CCC certifications guarantee safety and compliance with global standards.
Application Scenarios & Recommendations
Normally Open switches are widely used across various industries and scenarios. Below, we provide not only application examples but also key recommendations to help you select the right product for your specific needs:
1. Industrial Equipment
Application: NO switches are commonly used in factory control panels, start/stop buttons for machinery, and automation systems. These switches ensure reliable operation in demanding environments.
Recommendation: For industrial applications, choose switches with high current ratings such as the K20 Series, which offers a 20A/400V capacity, IP65 waterproof protection, and flame-retardant bases for enhanced durability and safety. Additionally, the HBDS0 Series with IP65 waterproofing and 10A/660V ratings is ideal for general industrial use.
2. Automotive Industry
Application: Used in vehicle dashboards, door sensors, and ignition systems, NO switches provide precise control and reliable performance in automotive systems.
Recommendation: Opt for compact switches like the HBDGQ Series, which features 12mm to 22mm mounting holes, IP67 waterproofing, and 5A/250V ratings. Their durable stainless steel or nickel-plated brass materials ensure resistance to vibration and environmental stress.
3. Household Devices
Application: Commonly used in lighting controls, kitchen appliances, and home automation systems, NO switches allow for convenient and safe operation of household electronics.
Recommendation: For residential setups, the HBDS1-D Series with customizable mounting options (16mm-30mm) and IP67 waterproofing is ideal. Its self-locking and self-reset functionality makes it versatile for household appliances.
4. Outdoor and Waterproof Applications
Application: In outdoor environments, such as marine equipment or garden lighting systems, NO switches must withstand exposure to water, dust, and extreme temperatures.
Recommendation: Choose the HBDS1-D Series or HBDGQ Series, both of which feature IP67 waterproof ratings and corrosion-resistant materials. These are perfect for harsh outdoor conditions.
5. Renewable Energy Systems
Application: Emerging applications in new energy industries, such as electric vehicle charging stations, demand switches with high durability and efficiency under continuous operation.
Recommendation: The K20 Series is an excellent choice for high-current applications in renewable energy setups. Its robust design and flame-retardant base ensure reliable performance in demanding environments.
Why Choose CDOE’s Normally Open Switches?
CDOE’s NO switches are designed to meet a wide range of requirements, offering features such as:
- IP67/IP68 Waterproof Ratings: Protection against water and dust, ideal for outdoor and industrial environments.
- Wide Voltage and Current Options: Compatible with low-voltage (6V-24V) and high-voltage (220V) systems, with current ratings of 5A, 10A, and 20A.
- Premium Materials: Anti-damage metal housings and eco-friendly plastic designs for durability and sustainability.
- Customizable Options: Tailored solutions, including laser engraving for switch heads, to meet specific customer needs.