The **M2AMS-2A-R2/N** is a specific model of an **Ultra-Miniature Illuminated Pushbutton Switch** manufactured by **NKK Switches**. It belongs to the M2 series, which is widely recognized for its high reliability and compact footprint in industrial and instrumentation panels. --- ### 1. Technical Specifications The following table breaks down the primary electrical and mechanical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Circuit Configuration** | DPDT (Double Pole Double Throw) | | **Switch Function** | ON - (ON) / Momentary (Spring return) | | **Contact Rating** | 1A @ 125V AC / 1A @ 30V DC | | **Illumination** | LED (Check specific color code, usually Red/Green options) | | **Mounting Type** | Through-hole (PCB Mount) | | **Terminal Type** | PC Pin (Straight) | | **Actuator Style** | Round / Snap-in Cap compatible | --- ### 2. Key Electronic Components & Materials To understand how the M2AMS-2A-R2/N functions, it is essential to look at its internal construction: * **Contacts (Silver):** The "R2" designation often implies silver contacts, which are ideal for power applications where a higher current rating (1A) is required compared to gold-plated logic-level contacts. * **LED Circuitry:** The "/N" suffix usually denotes the specific LED type or voltage requirements. The LED is electrically isolated from the switch circuit, allowing the light to be controlled independently (e.g., by a microcontroller or a separate power rail). * **Switching Mechanism:** It uses a "Snap-Action" or high-reliability spring mechanism to ensure a tactile "click" and to prevent electrical arcing during low-voltage transitions. * **Housing Material:** Typically made of Glass Fiber Reinforced Polyamide or Diallyl Phthalate (DAP) resin, providing high dielectric strength and heat resistance during soldering. --- ### 3. Application Use Cases Due to its DPDT configuration (allowing it to switch two separate circuits simultaneously) and its momentary action, this part is commonly found in: 1. **Control Panels:** As a "Reset" or "Start" button where visual feedback (LED) is required. 2. **Audio/Video Equipment:** High-end switching matrices where space is limited. 3. **Medical Instrumentation:** Where reliability and tactile feedback are critical for operator safety. --- ### 4. Schematic Representation The DPDT momentary configuration can be visualized as follows: ```text [LED +] [LED -] <-- Independent Illumination Pins (1) -- [Common 1] -- (2) <-- Pole 1 (3) -- [Common 2] -- (4) <-- Pole 2 * Pressing moves Common from Pin 1/3 to Pin 2/4. * Releasing returns it to Pin 1/3. ```