The options for 19mm SPDT micro switch

19mm SPDT micro switches come with a variety of actuator options to suit different actuation requirements. The most common ones include lever actuators, which are ideal for applications where a mechanical linkage needs to operate the switch. They offer a simple and reliable way to trigger the switch with a small amount of force. Roller actuators are another option, often used when the switch needs to be activated by a moving object in a linear or rotational motion. The roller reduces friction and wear, ensuring smooth operation over an extended lifespan. Pin actuators are suitable for applications where precise, pinpoint actuation is required, such as in small, compact devices with limited space for actuation mechanisms.

Terminal Configurations

Terminal configurations of 19mm SPDT micro switches are designed to facilitate easy integration into different circuits. Solder terminals are a popular choice, especially for applications involving printed circuit boards (PCBs). They provide a secure and permanent electrical connection when soldered onto the PCB pads. Quick-connect tabs, on the other hand, allow for fast and convenient wiring. These tabs can be easily inserted into corresponding connectors, eliminating the need for soldering in some cases. This makes them suitable for applications where quick assembly or disassembly might be required, such as in prototype development or maintenance of equipment.

Contact Ratings

Contact ratings vary among 19mm SPDT micro switches to meet the demands of different electrical loads. For low-current applications, such as in battery-powered devices or sensitive electronic circuits, switches with a contact rating of 0.1A - 1A at voltages like 12V - 24V DC are available. These switches are designed to handle the small electrical currents without significant power loss or contact degradation. In contrast, for more power-hungry applications in industrial settings or some household appliances, switches with higher contact ratings, up to 10A at 125V - 250V AC, can be used. These high-current switches are built with more robust contacts and better electrical insulation to handle the increased load safely.

Housing Materials

The housing of 19mm SPDT micro switches is available in different materials to withstand various environmental conditions. Flame-retardant thermoplastics, like PA66, are commonly used due to their excellent heat and impact resistance. This makes them suitable for applications where the switch might be exposed to high temperatures or mechanical stress. In applications where resistance to moisture, dust, or chemicals is crucial, such as in outdoor equipment or industrial machinery, switches with metal housings, often made of stainless steel, are preferred. Metal housings provide better protection against harsh environmental elements and can also offer electromagnetic shielding in some cases.

Illumination and Additional Features

Some 19mm SPDT micro switches come with illumination options, which can be useful in applications where visual indication of the switch's state is necessary. LED illumination is a popular choice, available in different colors such as red, green, and blue. For example, a red LED can indicate that a circuit is active or in an alarm state, while a green LED can show normal operation. Additionally, switches can be customized with special legends or markings on the actuator or housing. This is beneficial in applications where the function of the switch needs to be clearly identified, such as in control panels of complex machinery or in user - interface designs where quick recognition of switch functions is important.