The **M2TT-1B-R2** is a specific electronic component belonging to the **M2 series** of miniature toggle switches manufactured by **NKK Switches**. It is widely used in control panels, instrumentation, and telecommunications due to its reliability and compact form factor. --- ## 1. Core Technical Specifications The part number "M2TT-1B-R2" breaks down into specific electrical and mechanical attributes: | Specification | Details | | :--- | :--- | | **Switch Type** | Toggle Switch | | **Circuitry** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON - ON | | **Contact Rating** | 0.4VA Max @ 28V AC/DC (Logic Level) | | **Mounting Type** | Through-hole (PCB Mount), Right Angle | | **Actuator Style** | Standard Bat Lever (approx. 10.5mm) | | **Terminal Type** | PC Pin (Gold-plated) | --- ## 2. Component Breakdown The device consists of several critical electronic and mechanical sub-parts: ### A. Contact Mechanism * **Gold-Plated Contacts:** Since this is an "R" rated part (0.4VA), the contacts are plated with gold over nickel. This prevents oxidation and ensures high reliability for low-voltage/low-current logic signals. * **Double Pole Configuration:** It controls two separate circuits simultaneously, making it useful for switching both power and a signal line at once. ### B. Housing & Insulation * **Case Material:** Usually made of Glass Fiber Reinforced Polyamide or Diallyl Phthalate (DAP) resin. These materials offer high dielectric strength and heat resistance during soldering. * **Anti-Jamming Design:** The internal construction protects the contacts from damage if excessive force is applied to the toggle lever. ### C. Terminals * **Right Angle (R2) Orientation:** The pins are bent at a 90-degree angle. This allows the switch to be mounted on a horizontal PCB while the toggle protrudes through a vertical front panel. * **Epoxy Seal:** The base of the terminals is typically sealed with epoxy to prevent soldering flux or contaminants from entering the switch chamber. --- ## 3. Electrical Characteristics | Property | Value | | :--- | :--- | | **Insulation Resistance** | 1,000 Megohms minimum @ 500V DC | | **Dielectric Strength** | 1,000V AC minimum for 1 minute | | **Mechanical Life** | 100,000 operations minimum | | **Operating Temp Range** | -30°C to +85°C | --- ## 4. Common Applications Due to its **Logic Level** rating, it is NOT intended for switching 120V/240V mains power. Instead, it is found in: 1. **Handheld Devices:** Small size and low power consumption. 2. **Medical Equipment:** High reliability and tactile feedback. 3. **Audio/Visual Switchers:** Routing low-level signals without introducing noise. ---