In industrial automation and electrical systems, accuracy and reliability matter at every step. Even a small component can impact the overall performance of your setup. That’s where the MK3 Series Micro Limit Switch from Essen Deinki comes in.
Designed for precision control and long-term durability, this switch is widely used in automation panels, safety systems, and position-sensing applications. In this blog, we’ll cover the key specifications, main advantages, and practical installation tips to help you use the MK3 Micro Limit Switch effectively.
What Is the MK3 Series Micro Limit Switch?
The MK3 Series Micro Limit Switch is a compact, high-precision switch featuring a single-pole, double-break (SPDB) configuration. It uses a fast and reliable snap-action mechanism, ensuring consistent contact switching regardless of how slowly or quickly the actuator is pressed.
Because of this dependable performance, the MK3 series is commonly used as an electrical control micro switch in industrial automation, safety interlocks, and limit-sensing systems. It supports both AC and DC applications, making it highly versatile.
Technical Specifications of the MK3 Micro Limit Switch
Knowing the technical limits of a switch is essential for safe and efficient operation. The MK3 series meets international standards such as IEC 1058-1 and offers excellent mechanical and electrical performance.
Key Specifications:
- Circuit Type: 2-circuit, single-pole, double-break (1 NO + 1 NC)
- Current Rating: 5A at 250V AC
- Operating Force: Up to 284 gms
- Release Force: Minimum 28 gms
- Pre-travel: Max. 2.0 mm
- Movement Differential: Max. 0.94 mm
- Contact Material: Silver-plated or Gold-plated
- Mechanical Life: Up to 1 million operations
- Electrical Life: 50,000 operations
- Operating Temperature: -65°C to +125°C
These industrial micro limit switch specifications make the MK3 series suitable for demanding environments.
Advantages of the MK3 Micro Limit Switch
Fast and Reliable Snap-Action
The spring-loaded snap-action mechanism ensures instant contact changeover. This reduces electrical arcing, improves switching accuracy, and extends contact life.
Flexible Design Options
The MK3 series supports push-button actuators in multiple colors such as red, green, yellow, blue, black, and white. Optional chrome-plated metal shrouds add extra protection and improve durability in harsh conditions.
Enhanced Safety with Double-Break Contacts
The double-break design interrupts the circuit at two points at once. This improves safety and allows the switch to handle higher voltages more effectively than single-break switches.
Compact Yet Rugged
With its small footprint, the MK3 Micro Limit Switch fits easily into tight spaces while still offering the toughness required for industrial use.
Correct NO/NC Wiring
The switch includes both Normally Open (NO) and Normally Closed (NC) contacts. Double-check wiring to ensure the desired control logic or fail-safe operation.
Frequently Asked Questions
Q1. What makes the MK3 Micro Limit Switch different?
Ans: It features a single-pole, double-break snap-action design, allowing faster switching, better safety, and reduced electrical wear compared to standard switches.
Q2. Can the MK3 switch be used for DC circuits?
Ans: Yes. It supports both AC and DC loads. For DC inductive loads, always follow the derating values in the technical catalog.
Q3. Which contact material should I choose?
Ans: Silver-plated contacts: Suitable for standard power applications
Gold-plated contacts: Ideal for low-level or dry circuits where oxidation must be avoided
Q4. Is the MK3 series suitable for high temperatures?
Ans: Yes. With an operating range from -65°C to +125°C, it performs reliably even in extreme industrial environments.
Conclusion
The MK3 Series Micro Limit Switch is a compact yet powerful solution for precise control applications. Its robust construction, wide temperature tolerance, and reliable snap-action mechanism make it a trusted choice for engineers and system designers.
Whether you’re upgrading an existing system or designing a new one, the MK3 series delivers the reliability and flexibility required in modern industrial applications.
Explore the full MK3 Series range on the Essen Deinki website to find the right model for your application.