The **KAS-2A-R** is an electronic component primarily known as a **2-position, Right-Angle (R/A) DIP Switch**. These switches are used on printed circuit boards (PCBs) to manually set configurations, addresses, or logic states. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Switch Type** | DIP (Dual In-line Package) | | **Number of Positions** | 2 | | **Actuator Style** | Slide / Raised | | **Orientation** | Right-Angle (Horizontal) | | **Terminal Type** | Through-hole (PC Pin) | | **Contact Rating** | 25mA @ 24VDC | | **Contact Resistance** | 50mΩ Max (Initial) | | **Dielectric Strength** | 500VAC for 1 minute | --- ### 2. Physical Construction * **Housing:** Typically made of high-temperature Thermoplastic (UL94V-0 rated) to withstand soldering heat. * **Contacts:** Usually gold-plated over nickel. Gold is used to prevent oxidation, ensuring long-term reliability for switches that may not be moved for years. * **Actuator:** The physical slides used to toggle the "ON" or "OFF" positions. * **Sealing:** Often comes with a top-tape seal (removable) to allow for wave soldering and aqueous cleaning without contaminating the internal contacts. --- ### 3. Circuit Representation The KAS-2A-R consists of two independent **SPST** (Single Pole Single Throw) switches. When the slider is moved to the "ON" position, it closes the circuit between the corresponding pins. ```text [ TOP VIEW ] +-------------+ (1) | [ ] [ ] | (2) <-- Slide Actuators +-------------+ | | | | <-- Right-Angle Pins ``` --- ### 4. Common Applications 1. **Device Addressing:** Setting unique IDs for devices on a communication bus (e.g., RS-485 or DMX). 2. **Configuration:** Enabling or disabling specific features on a motherboard or industrial controller. 3. **Frequency Selection:** Adjusting channels on RF transmitters or receivers. 4. **Security Codes:** Setting manual codes for garage door openers or older wireless systems. --- ### 5. Why "Right-Angle"? The **"R"** in the part number signifies the right-angle mounting. This is chosen when: * The PCB is stacked, and the switch needs to be accessible from the **side** of the enclosure. * Vertical space (height) is limited, but there is more horizontal room on the board.