<p>The MMS2 series key-operated switch is a robust and reliable choice for industrial and commercial applications. Crafted from durable metal, this non-illuminated switch is designed to withstand challenging environments with an operational temperature range of -30 to 70 degrees Celsius. Its high degree of protection, rated at IP66, ensures excellent resistance against dust and powerful water jets, making it suitable for outdoor or harsh indoor conditions.</p><p>Engineered with precision, the MMS2 series complies with multiple international standards 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 underscore its reliability and safety in diverse electrical systems.</p><p>The switch features a screw connection type for secure and straightforward installation. With a contact configuration of 1 normally open (NO) plus 1 normally closed (NC), it provides flexibility in control circuits while ensuring safe operation through its maintained function actuator type.</p><p>This model supports a rated insulation voltage of up to 690 volts and can handle a significant rated thermal current of up to 10 amperes. Additionally, the switch boasts a rated impulse withstand voltage of 4 kilovolts which enhances its resilience against transient overvoltages.</p><p>Designed with user convenience in mind, the cutout size stands at an industry-standard diameter of 22 millimeters allowing for easy integration into existing panels or new installations without requiring additional modifications.</p><p>In terms of functionality, the maintained position options B and C provide users with versatile control capabilities tailored to specific application needs. The inclusion of an LED block light type further adds to its utility by offering visual status indication where required.</p><p>Overall the MMS2 series key-operated switch delivers on performance durability and compliance providing peace of mind for professionals seeking dependable solutions in their technical setups without compromising on quality or efficiency.</p>