The **CRE10ROTM1S-R** is a specific electronic component primarily identified as a **Rotary Coded Switch** (often referred to as a BCD or Hexadecimal rotary switch) manufactured by **Copal Electronics** (now Nidec Components). --- ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Nidec Components (Copal Electronics) | | **Series** | CRE Series | | **Output Code** | Real Code (Binary Coded Decimal / Hexadecimal) | | **Positions** | 10 Positions (0-9) | | **Actuator Type** | Top Actuated / Recessed Slot (Rotatable by screwdriver) | | **Mounting Type** | Surface Mount (SMD / SMT) | | **Terminal Shape** | Gull-wing (J-bend variants also exist in this series) | | **Contact Rating** | 100mA at 5V DC (Switching), 100mA at 50V DC (Non-switching) | | **Operating Temperature** | -40°C to +85°C | --- ## Component Breakdown ### 1. Functionality The device is a digital selector. When you rotate the dial to a specific number (0 through 9), it connects a specific combination of its output pins to the common pin. This represents the decimal number in **binary format** (4-bit). ### 2. Packaging & Form Factor * **Miniature Size:** Usually 7mm x 7mm, designed for high-density PCB layouts. * **Surface Mount:** The "S" in the part number suffix often denotes SMD terminals, allowing for automated "pick and place" assembly and reflow soldering. * **Tape and Reel:** The "-R" suffix indicates that the parts are supplied on a reel for industrial manufacturing. ### 3. Construction Materials * **Contacts:** Usually gold-plated to ensure low contact resistance and prevent oxidation over time. * **Housing:** Heat-resistant plastic (Polyphenylene Sulfide - PPS) capable of withstanding the high temperatures of lead-free soldering processes. --- ## Common Applications * **Address Setting:** Used in industrial networking (like RS-485 or CAN bus) to set the unique ID of a peripheral device. * **Configuration:** Selecting operating modes on a circuit board without needing a screen or complex interface. * **Communication Equipment:** Setting channels or frequency bands in radio and telecom hardware. --- ## Internal Logic Table (10 Position) | Position | Pin 1 (2⁰) | Pin 2 (2¹) | Pin 4 (2²) | Pin 8 (2³) | | :---: | :---: | :---: | :---: | :---: | | 0 | OFF | OFF | OFF | OFF | | 1 | ON | OFF | OFF | OFF | | 5 | ON | OFF | ON | OFF | | 9 | ON | OFF | OFF | ON |