MICROSWITCH MX100PT21 Honeywell

( Brand: Microswitch ), ( Manufacturer Part Number: MX100PT21 )

Review MICROSWITCH Honeywell Used

The **Honeywell MX100PT21** is a high-performance, industrial-grade microswitch designed for demanding applications where reliability, precision, and durability are paramount. This compact yet robust snap-action switch features a **PT21 (Plastic Toggle) actuator**, offering a clean, ergonomic lever mechanism that ensures consistent and repeatable operation even in environments with frequent cycling or exposure to contaminants. Engineered with Honeywell s signature quality, the MX100PT21 is built to withstand harsh conditions, including temperature fluctuations, moisture, and mechanical stress, making it ideal for use in automotive, industrial machinery, medical equipment, and automation systems. The switch employs a **normally open (NO) contact configuration**, delivering a clean, dry circuit with minimal contact bounce, which enhances signal integrity in control circuits, sensors, and safety systems. Its **low-profile design** allows for seamless integration into tight spaces, while the **metal housing** provides structural rigidity and resistance to wear, ensuring long-term performance even under heavy loads. The MX100PT21 is also compatible with a wide range of mounting options, including panel, base, or direct-mount configurations, offering versatility for different installation requirements. With its **high contact capacity (up to 10A at 250VAC or 30VDC)**, this microswitch is well-suited for applications requiring robust electrical switching, such as door sensors, limit switches, or emergency stop systems. Additionally, Honeywell s commitment to quality assurance ensures that each unit undergoes rigorous testing for electrical performance, mechanical endurance, and environmental resistance, guaranteeing dependable operation throughout its service life. Whether deployed in a factory automation setup, a medical device, or a vehicle s safety system, the MX100PT21 delivers the precision and durability needed to meet the most exacting industrial standards.

The **Honeywell MX100PT21** is a micro switch designed for general-purpose applications, particularly in industrial, automotive, and consumer electronics. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Honeywell MX100PT21**

1. **Reliability and Durability**

The MX100 series is known for its robust construction, capable of handling frequent actuations (typically rated for millions of cycles). It is designed to withstand harsh environments, including exposure to moisture, dust, and temperature fluctuations, making it suitable for industrial and automotive applications.

2. **Compact and Versatile Design**

As a micro switch, it occupies minimal space, allowing for integration into tight or confined areas where larger switches cannot fit. Its small form factor makes it ideal for applications requiring precision, such as in machinery, appliances, or electronic devices.

3. **Wide Range of Actuation Options**

The MX100PT21 is available in various configurations, including push-button, lever, and roller-actuated versions. This flexibility allows it to be adapted to different mechanical interfaces depending on the application s requirements.

4. **Low Operating Force**

The switch requires minimal force to actuate, reducing wear and tear on both the switch and the actuating mechanism. This is particularly advantageous in applications where delicate components are involved.

5. **Compatibility with Honeywell s Ecosystem**

Honeywell offers a wide range of complementary components, such as relays, sensors, and controllers, that are designed to work seamlessly with their switches. This can simplify integration into larger systems.

6. **Cost-Effective for High-Volume Applications**

While individual units may not be the cheapest on the market, the MX100 series is often cost-effective for bulk purchases due to Honeywell s reputation for quality and longevity. This can lead to lower long-term maintenance and replacement costs.

7. **Standardized and Easy to Source**

The MX100PT21 is a widely available part, meaning it can be easily sourced from distributors, retailers, or directly from Honeywell. This reduces lead times and simplifies procurement processes.

8. **Good Electrical Performance**

The switch is designed to handle standard electrical loads (typically rated for 3A at 250V AC or 30V DC), which is sufficient for many low-power applications. It also offers good contact resistance and arcing performance for its class.

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### **Cons of the Honeywell MX100PT21**

1. **Limited High-Power or High-Voltage Capabilities**

The MX100PT21 is not designed for high-power or high-voltage applications. Its 3A/250V AC rating may be insufficient for heavy-duty industrial machinery, motor controls, or high-current applications. For such uses, a heavier-duty switch (e.g., a snap-action switch or a power switch) would be more appropriate.

2. **Sensitivity to Environmental Contaminants**

While the switch is rated for general-purpose use, prolonged exposure to corrosive substances (e.g., chemicals, salt spray, or extreme humidity) can degrade its performance over time. For harsh environments, specialized sealed or hermetically sealed switches may be required.

3. **Potential for Contact Wear Over Time**

Like all mechanical switches, the MX100PT21 is subject to contact wear with repeated actuations. While it is designed for millions of cycles, extreme or abusive usage (e.g., frequent high-force actuations) can reduce its lifespan. Regular maintenance or replacement may be necessary in high-stress applications.

4. **Limited Customization**

The MX100 series is not highly customizable in terms of wiring, mounting, or actuation style. Users are limited to the configurations Honeywell provides, which may not always align perfectly with unique design requirements.

5. **Potential for False Triggers**

In applications where the switch is subjected to vibration or mechanical shock, there is a risk of false triggering or inconsistent performance. This could lead to unreliable operation in dynamic environments.

6. **Higher Cost Than Basic Switches**

Compared to very basic or generic micro switches from lesser-known brands, the MX100PT21 may be priced higher. However, this is often justified by its reliability and quality, but budget-conscious buyers may explore alternatives.

7. **Lead Time and Stock Availability**

While generally available, stock levels can vary depending on the distributor or region. In some cases, ordering may require lead times, which could impact project timelines.

8. **Limited Documentation or Support for Niche Applications**

Honeywell s documentation for the MX100 series is comprehensive but may not cover every niche application. Buyers in specialized fields (e.g., aerospace, medical) may need to consult additional resources or engineering support to ensure suitability.

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### **Conclusion**

The **Honeywell MX100PT21** is a well-suited micro switch for a wide range of general-purpose applications where reliability, compactness, and ease of integration are priorities. Its strengths lie in its durability, versatility, and compatibility with Honeywell s ecosystem, making it a solid choice for industrial, automotive, and consumer electronics use. However, it is not ideal for high-power, high-voltage, or extremely harsh environments where specialized switches would be more appropriate.

For applications requiring minimal force, frequent actuations, and standard electrical loads, the MX100PT21 offers a good balance of performance and cost. Conversely, buyers should carefully evaluate whether its limitations (such as power handling or environmental resistance) align with their specific needs.

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### **Recommendation**

- You need a reliable, compact micro switch for general-purpose applications (e.g., machinery, appliances, automotive systems).

- Your application involves low to moderate electrical loads (up to 3A/250V AC or 30V DC).

- You require a switch with a long lifespan and minimal actuation force.

- You prefer a well-supported, widely available part with Honeywell s reputation for quality.

- Your application requires high-power or high-voltage switching (consider a snap-action or power switch instead).

- The environment is extremely harsh (e.g., high corrosion, extreme temperatures, or heavy contamination).

- You need highly customized or specialized actuation mechanisms.

- Cost is a critical factor, and you can find equally reliable alternatives at a lower price.

- For high-power applications: **Omron G2R series** or **TE Connectivity micro switches**.

- For extreme environments: **Sealed or hermetically sealed switches** from brands like **Honeywell (e.g., MX100 series with additional sealing)** or **Schneider Electric**.

- For cost-sensitive applications: **Generic micro switches** from brands like **Alps, Panasonic, or local manufacturers**, provided they meet your reliability requirements.

In summary, the MX100PT21 is a strong choice for most standard applications but should be carefully evaluated against alternatives for specialized or high-demand use cases.

Details:

All products are guaranteed to be working but may show signs of use if purchasing a used product. Part Number MX100PT21. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Sells new and surplus product develops channels to purchase such.

Call to use a shipping service other than the ones listed.

part #: mx100pt21 prices

• $51.00-$295.00

specifications sensoindustria:

• brand: Microswitch
• mpn: Mx100pt21

general sensoindustria:

• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules
• condition: Used

returns sensoindustria:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer
• method: Money back

shipping sensoindustria:

• type: Fixed
• cost: $12.90
• class: Standard
• transit: 24-37 Days
• service: Standard

offer sensoindustria:

• started: March 26, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1

payments sensoindustria:

• credit card: Visa
• wallet: Paypal
• other

seller sensoindustria:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• rating: 99.6%
• # reviews: 196335

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