The **ALSP-243-R** is a specific electronic component, typically categorized as a **DIP (Dual In-line Package) Switch**. These switches are used on printed circuit boards (PCBs) to customize the behavior of an electronic device manually. Below is a detailed breakdown of its specifications and electronic characteristics. --- ### 1. General Specifications The ALSP-243-R belongs to the low-profile, slide-type DIP switch family. The "243" nomenclature usually refers to the series and the number of positions. | Feature | Specification | | :--- | :--- | | **Type** | DIP Switch (Slide Type) | | **Number of Positions** | 3 Positions (Channels) | | **Actuator Style** | Recessed / Low Profile | | **Mounting Type** | Through-Hole (THT) | | **Contact Material** | Gold-plated (typically) for high reliability | | **Housing Material** | High-temperature Thermoplastic (UL94V-0) | --- ### 2. Electrical Characteristics These parts are designed for low-power signal switching rather than high-power applications. * **Switching Capacity:** Usually rated at **25mA, 24VDC**. * **Non-Switching Rating:** Can handle up to **100mA, 50VDC** when the circuit is already closed. * **Contact Resistance:** Initially around **50mΩ max**. * **Insulation Resistance:** Minimum **100MΩ** at 500VDC. * **Dielectric Strength:** 500VAC for 1 minute. --- ### 3. Physical & Mechanical Properties The "R" in the part number often signifies specific packaging or physical traits like "Recessed" actuators or "RoHS" compliance. * **Pitch:** Standard **2.54mm (0.1 inch)** spacing between pins, making it compatible with breadboards and standard PCB grids. * **Operating Temperature:** Typically rated from **-25°C to +70°C**. * **Durability:** Mechanical life of approximately **2,000 cycles** per switch. * **Sealing:** Often comes with a top tape seal to allow for wave soldering and aqueous cleaning without contaminating the internal contacts. --- ### 4. Common Applications The ALSP-243-R is used in scenarios where hardware configuration is required without the need for software programming tools: 1. **Address Setting:** Used in industrial networking (like RS-485 nodes) to set a unique ID for a device. 2. **Configuration:** Selecting between different modes of operation (e.g., choosing between 110V/220V logic or baud rates). 3. **Security Codes:** Setting manual codes for garage door openers or older wireless transmitters. --- ### 5. Schematic Representation In a circuit diagram, the part is represented as a series of simple Single Pole Single Throw (SPST) switches. ```text Pin 1 (Top) ----/ ---- Pin 6 (Bottom) [Switch 1] Pin 2 (Top) ----/ ---- Pin 5 (Bottom) [Switch 2] Pin 3 (Top) ----/ ---- Pin 4 (Bottom) [Switch 3] ```