The **M2TT-2F-R/N** is a precision electronic toggle switch manufactured by **NKK Switches**. It belongs to the **M2 series** of miniature, process-sealed toggles specifically designed for PC board mounting. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Circuit Configuration** | DPDT (Double Pole, Double Throw) | | **Switch Function** | ON - ON | | **Contact Rating (Logic)** | 0.4VA Max @ 28V AC/DC Max | | **Mounting Type** | Through Hole, Right Angle (Vertical) | | **Actuator Style** | Flatted Lever | | **Sealing** | Process Sealed (Washable) | | **Terminal Spacing** | 0.100" (2.54mm) Grid | --- ### 2. Breakdown of the Part Number The nomenclature for this part can be broken down to understand its physical and electrical characteristics: * **M2**: Series identifier (Process Sealed Miniature Toggles). * **TT**: Designates the flatted lever actuator style. * **2**: Number of poles (2 = Double Pole). * **F**: Switching function (F = ON-ON). * **R**: Terminal type (R = Right angle PC terminals, vertical mount). * **N**: Contact material (N = Gold over Nickel/Brass/Bronze, intended for low-level logic). --- ### 3. Electronic Design Features #### A. Logic Level Reliability The **"N" suffix** indicates gold-plated contacts. Unlike silver contacts that require a "wiping" action to clear oxidation, gold contacts are ideal for low-power logic circuits where high voltages are not present to break through surface oxides. #### B. Process Sealed Construction The switch features an ultrasonic welding of the housing and an epoxy seal at the base. This allows the PCB to be subjected to automated soldering and cleaning (washing) processes without flux or contaminants entering the internal switch mechanism. #### C. Actuator and Ergonmics The **"TT" flatted lever** provides a distinct aesthetic and tactile feel compared to standard round bat toggles. The right-angle mounting (**R**) allows the toggle to be accessible from the edge of a device while the switch body sits flat on the motherboard. --- ### 4. Common Applications * Handheld medical devices. * Industrial control panels. * Telecommunications equipment. * Testing and measurement instrumentation.