The **LCS-02-R/E2** is a specific model within the LCS series of **subminiature snap-action microswitches**, typically manufactured by C&K (now part of Littelfuse). These switches are widely used in automotive, industrial, and consumer electronics due to their high reliability and small footprint. --- ### 1. Technical Specifications Table | Feature | Specification | | :--- | :--- | | **Switch Type** | Subminiature Snap Action | | **Circuitry** | SPDT (Single Pole Double Throw) | | **Operating Force** | 203 gf (2.0N) | | **Current Rating** | 0.1A to 5A (depending on voltage/load) | | **Voltage Rating** | 125/250 VAC | | **Actuator Type** | Lever (Simulated Roller) | | **Termination** | Right-Angle PC Pin (Through-hole) | | **Mechanical Life** | 10,000 to 1,000,000 cycles | --- ### 2. Breakdown of the Part Number (LCS-02-R/E2) The part number follows a specific nomenclature that defines its electronic and physical characteristics: * **LCS**: Series Prefix (Subminiature Snap-acting switch). * **02**: **Rating/Current**. Usually denotes a medium-range current rating (approx. 2A or 5A depending on the specific series chart). * **R**: **Termination Style**. Indicates a **Right Angle** PCB mount configuration. This allows the switch to be mounted flat on a board while the actuator is triggered from the side. * **E2**: **Actuator Type**. Specifically refers to a **Simulated Roller Lever**. This reduces friction compared to a standard pin plunger, allowing for smoother activation by cams or sliding objects. --- ### 3. Electronic Design Features #### Internal Contact Mechanism The "Snap Action" means that the contact transfer happens at a specific, repeatable point regardless of the speed of the actuator. This is achieved through a **prestressed spring** mechanism that flips the contact from the NC (Normally Closed) to the NO (Normally Open) terminal instantly. #### Contact Material These switches typically use **Silver Alloy** (for higher currents) or **Gold plating** (for low-level logic signals) to ensure low contact resistance and prevent oxidation. #### Environmental Protection The E2 variant often features an IP40 or IP67 rating (depending on the housing seal), protecting the internal electrical contacts from dust or moisture ingress. --- ### 4. Application Circuit Example Since the LCS-02-R/E2 is an **SPDT** switch, it has three pins: **Common (C)**, **Normally Open (NO)**, and **Normally Closed (NC)**. ```python # Typical SPDT Logic Wiring # ------------------------- # Pin 1 (Common): Connected to Power (VCC) # Pin 2 (NC): Connected to "Device Off" Indicator # Pin 3 (NO): Connected to "Device On" Load # When the lever is pressed: # Circuit C-NC opens (breaks) # Circuit C-NO closes (makes) ``` ---