<p>The MMS2 series key-operated switch is a robust and reliable choice for industrial and commercial applications where non-illuminated operation is required. Crafted from durable metal, this switch ensures longevity and resilience in demanding environments. With an operational temperature range of -30 to 70 degrees Celsius, it can withstand extreme conditions, making it suitable for a variety of settings.</p><p>One of the standout features of this product is its IP66 degree of protection. This rating indicates that the switch is dust-tight and protected against powerful water jets, ensuring optimal performance even in harsh environments. It&#39;s well-suited for use in outdoor or dusty indoor locations where exposure to the elements might be a concern.</p><p>In terms of standards and approvals, the MMS2 series meets several key certifications including CSA C22.2 No. 14, IEC/EN 60073, IEC/EN 60529, IEC/EN 60947-5-1, IEC/EN 60947-5-5, and UL 508. These certifications indicate compliance with international safety standards for electrical equipment used in control circuits.</p><p>The connection type for this device is Faston, which provides quick and secure connections without the need for soldering or additional tools—ideal for efficient installation and maintenance processes.</p><p>With a rated insulation voltage of up to 690 V and a rated impulse withstand voltage of 4 kV, this switch offers robust electrical endurance suitable for high-voltage applications. The contact configuration includes two normally closed (2NC) contacts which are commonly used in safety circuits to ensure that power is cut off when necessary.</p><p>Designed with user-friendly functionality in mind, the actuator type is key-operated with maintained positions B and C. This means once activated by turning the key to either position B or C; it will remain engaged until manually reset—a feature particularly useful in scenarios requiring consistent operation over time without constant manual intervention.</p><p>Additionally, the inclusion of an LED block as part of its light blocks type allows users to integrate illumination into their systems if needed at later stages without replacing existing components—a flexible option catering to evolving project requirements.</p><p>Overall, this key-operated switch from the MMS2 series combines durability with technical precision suited perfectly for professionals seeking reliable components that meet stringent industry standards while providing ease-of-use through thoughtful design elements such as fast connections and maintained operation modes—all within a compact cutout size of just 22 mm suitable across various panel designs or installations.</p>