The **AOFW401-R** is a specific model within the industrial automation and control component category, typically manufactured by companies like **IDEC** (specifically their TW series). It is an illuminated flush-mount pushbutton switch. Below is the technical breakdown of its electronic and mechanical parts. --- ## 1. Technical Specifications The AOFW401-R is designed for heavy-duty industrial panels. Its model code indicates its specific configuration: | Feature | Specification | | :--- | :--- | | **Series** | TW Series (Heavy Duty) | | **Operator Shape** | Flush Silhouette (Low profile) | | **Contact Configuration** | 1NC (Normally Closed) | | **Illumination** | Non-Illuminated (standard for 'O' type) or LED/Incandescent (depending on suffix) | | **Button Color** | Red (R) | | **Mounting Hole** | 22mm | | **Action** | Momentary (Spring Return) | --- ## 2. Key Electronic & Mechanical Parts ### A. Contact Block (The Electrical Interface) The "401" in the model number designates the contact arrangement. * **NC Contact:** The device features one Normally Closed contact block. When the button is pressed, the internal circuit is broken (opened). * **Self-Cleaning Contacts:** IDEC TW series blocks use a "rolling action" to self-clean the contacts, ensuring low resistance and high reliability over thousands of cycles. * **Terminal Type:** Typically uses M3.5 screw terminals with captive wire clamps for secure wiring. ### B. Operator Mechanism * **Momentary Action:** The "O" designation indicates a momentary push. The internal spring returns the button to its original position as soon as physical pressure is released. * **Protection Rating:** Usually rated **IP65** (waterproof/oil-tight) from the front of the panel, using a rubber gasket to prevent liquid ingress into the electrical enclosure. ### C. Housing Materials * **Chrome Plated Bezel:** The outer ring is usually metallic (zinc die-cast) or high-grade reinforced plastic with chrome plating for durability in harsh environments. * **Red Button Lens:** Made of high-impact polycarbonate. --- ## 3. Electrical Ratings In industrial applications, these parts are rated for both AC and DC loads: | Parameter | Rating | | :--- | :--- | | **Insulation Voltage** | 600V | | **Thermal Current (Ith)** | 10A | | **Operating Voltage (AC)** | 120V @ 6A / 240V @ 3A | | **Operating Voltage (DC)** | 125V @ 1.1A | | **Contact Resistance** | 50 mΩ maximum (initial) | --- ## 4. Typical Wiring Application Since this is a **1NC (Normally Closed)** switch, it is most commonly used as: 1. **Stop Button:** To interrupt power to a motor starter or relay. 2. **Safety Interlock:** To ensure a circuit remains broken while a panel or door is accessed. ```mermaid graph LR Power[Power Source] --> Terminal1[AOFW401-R Terminal 1] Terminal1 --> Contact[Normally Closed Link] Contact --> Terminal2[AOFW401-R Terminal 2] Terminal2 --> Load[Motor/Relay] ```