The **M2RT-34-R** is a specific electronic component within the category of **rotary switches**, typically manufactured by companies like **NKK Switches**. It is a subminiature, process-sealed rotary switch designed for logic-level applications on printed circuit boards (PCBs). --- ### Technical Specifications The following table highlights the core electronic and mechanical parameters of the M2RT-34-R: | Parameter | Specification | | :--- | :--- | | **Switch Type** | Rotary | | **Circuit Configuration** | 3-Pole, 4-Position (3P4T) | | **Current Rating** | 0.4VA Max @ 28V AC/DC Max | | **Contact Material** | Gold plated (Logic Level) | | **Mounting Type** | Through-hole PCB | | **Actuator Type** | Screwdriver Slot (Flush) | | **Sealing** | Process Sealed (Washable) | | **Operating Temp** | -25°C to +70°C | --- ### Key Electronic Features #### 1. Logic Level Reliability Unlike power switches, the M2RT-34-R uses **gold contacts**. This is critical for electronic circuits where the voltage and current are very low (logic levels). Gold prevents oxidation, ensuring a reliable electrical connection even when the switch is not operated frequently. #### 2. Process Sealed Construction The "R" in the suffix often denotes its environmental protection. The switch features an automated soldering-friendly design: * **Ultrasonic Cleaning:** It is sealed to withstand high-pressure washing after soldering. * **O-ring Seals:** Internal silicone rubber O-rings prevent the entry of flux or cleaning solvents. #### 3. Circuit Logic As a **3P4T** switch, it has three common pins and four selectable output positions for each. This allows a single turn of the screwdriver to change the state of three independent signal lines simultaneously. --- ### Internal Structure (Simplified) The switch operates using a rotating contact mechanism: 1. **Stator:** The fixed base containing the PCB terminals. 2. **Rotor:** The moving part that bridges the common terminal to one of the four output pins. 3. **Detent Mechanism:** Provides a tactile "click" feeling to ensure the switch sits squarely on a position and doesn't float between circuits. --- ### Applications * **Mode Selection:** Choosing between different operating states in a handheld device. * **Address Setting:** Configuring hardware IDs on a communication bus. * **Diagnostic Tools:** Selecting different test parameters on a measurement board.