The **M2RT-52-R** is a high-performance, ultra-miniature rotary switch manufactured by **NKK Switches**. It is primarily used in compact electronic devices where space is at a premium and reliable circuit switching is required. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Circuit Type** | DPDT (Double Pole, Double Throw) | | **Number of Positions** | 2 Positions | | **Switching Function** | ON-ON | | **Contact Rating** | 0.4VA Max @ 28V AC/DC (Logic Level) | | **Mounting Type** | Through-hole (Right Angle PC Mount) | | **Terminal Material** | Gold plated | | **Operating Temperature** | -25°C to +85°C | --- ### 2. Major Electronic Components & Design #### A. Logic Level Contacts The internal contacts are designed for **Logic Level** applications. Unlike standard switches that use silver (which requires a "wiping" action to clear oxidation), the M2RT-52-R uses **Gold-over-Nickel** plating. * **Purpose:** Ensures high reliability in low-voltage/low-current circuits where an arc is not present to break down surface oxides. #### B. Sealing and Protection The switch features an automated soldering-friendly design: * **Bushing & Case:** Constructed from heat-resistant resin (Polybutylene Terephthalate or similar). * **Terminals:** Molded-in terminals prevent the entry of flux, solvents, or other contaminants during the PCB soldering process. #### C. Actuation Mechanism The "RT" in the series name refers to the **Rotary** action. * **Shaft:** The shaft is made of brass with nickel plating. * **Detent Mechanism:** Features a positive detent mechanism that provides tactile feedback to the user, ensuring the switch is "locked" into position. --- ### 3. Applications Due to its miniature size and right-angle orientation, it is commonly found in: 1. **Handheld Devices:** For mode selection or power toggling. 2. **Telecommunications:** Signal routing in compact networking hardware. 3. **Medical Equipment:** Small-scale diagnostic tools requiring high reliability.