The part number **10RS-1B-R0-R/C02** refers to a high-precision, sub-miniature **Surface Mount Device (SMD) Reed Switch**. These components are widely used for non-contact sensing, proximity detection, and low-power switching applications. ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics typically associated with this series: | Property | Specification | | :--- | :--- | | **Contact Form** | Form A (Normally Open) | | **Switching Voltage** | Max 100V DC/AC | | **Switching Current** | Max 0.5A | | **Power Rating** | 10W (VA) | | **Contact Resistance** | < 150 mΩ | | **Sensitivity Range** | 10-15 AT (Ampere Turns) | | **Operating Temp** | -40°C to +125°C | | **Package Type** | Gull-wing (SMD) | --- ### 2. Part Number Breakdown While manufacturer coding can vary slightly (often produced by brands like **MEDER/Standex** or **Littelfuse**), the suffixing usually indicates: * **10RS:** The series designation (indicating a 10mm glass length or 10W power rating). * **1B:** Magnetic sensitivity class (low pull-in range). * **R0:** Packaging code (often signifies Tape & Reel). * **R/C02:** Specific lead formation (Gull-wing for SMD mounting) and RoHS compliance. --- ### 3. Functional Mechanism A Reed Switch consists of two ferromagnetic blades (reeds) hermetically sealed in a glass envelope. 1. **State:** In its default state, the contacts are open. 2. **Activation:** When a magnetic field (from a permanent magnet or electromagnet) approaches, the reeds become polarized and attract each other. 3. **Completion:** The circuit closes, allowing current to flow. ### 4. Key Advantages and Applications * **No Power Consumption:** Does not require power to operate in the "sensing" mode; only reacts to magnetic fields. * **Hermetically Sealed:** The contacts are protected from oxidation, dust, and moisture, making them highly reliable in harsh environments. * **Longevity:** Capable of millions of switching cycles. **Common Uses:** * **Mobile Devices:** Detecting if a flip-phone or tablet cover is closed. * **Security Systems:** Door and window open/close sensors. * **Industrial:** Fluid level sensing (using a float with a magnet). * **Medical:** Non-contact activation for implantable or portable devices.