The **KUS-2A-R** is an electronic component primarily classified as a **Sealed Power Relay** or a specialized switching device, often used in industrial control systems and power management. Below is a detailed breakdown of its electronic characteristics and specifications. ### 1. Technical Specifications The following table summarizes the key electrical parameters typically associated with the KUS series (specifically the 2A-R variant): | Parameter | Specification | | :--- | :--- | | **Contact Form** | 2 Form A (DPST-NO - Double Pole Single Throw, Normally Open) | | **Coil Voltage** | Typically 12V or 24V DC (Model dependent) | | **Contact Rating** | 5A to 10A @ 250VAC / 30VDC | | **Insulation Resistance** | 1,000 MΩ Min. (at 500VDC) | | **Dielectric Strength** | 2,000V AC (between coil and contacts) | | **Mounting Type** | PCB Mount or Plug-in | | **Termination** | Solder terminals / PC Pins | --- ### 2. Key Electronic Parts & Construction The KUS-2A-R consists of several internal sub-components that work together to perform the switching action: * **Electromagnetic Coil:** The "input" side. When current flows through the copper windings, it creates a magnetic field that moves the armature. * **Armature & Spring:** A mechanical linkage that moves when the coil is energized. The spring ensures the contacts return to their default "Open" position when power is removed. * **Silver Alloy Contacts:** The "output" side. These are designed to handle high current loads with minimal electrical resistance and arc erosion. * **Sealed Housing:** The "R" in the suffix often denotes a **Resin-sealed** or **Ruggedized** construction, protecting the internal parts from dust, moisture, and oxidation. --- ### 3. Applications Due to its 2-pole configuration and power handling capabilities, it is commonly used in: 1. **Industrial Automation:** Controlling small motors or solenoids. 2. **HVAC Systems:** Switching fans or heating elements. 3. **Power Supplies:** Serving as a safety disconnect or circuit selector. 4. **Office Equipment:** Handling high-voltage switching in printers and copiers. --- ### 4. Circuit Diagram Representation In a schematic, the KUS-2A-R is represented as a single coil controlling two independent switches: ```text Coil (Pins 1-2) Switch 1 (Pins 3-4) Switch 2 (Pins 5-6) _______ / / --| |-- --o o-- --o o-- |_______| (Normally Open) (Normally Open) ```