The part number **M2RR-10-R2/Q** refers to a high-precision, subminiature magnetic reed switch or sensor, typically manufactured by companies like **Standex Electronics** (formerly MEDER). These components are primarily used for proximity sensing, level detection, and safety switching. --- ### 1. Component Specifications The following table outlines the typical electrical and physical characteristics of this series: | Parameter | Specification | | :--- | :--- | | **Contact Form** | Form A (Normally Open) | | **Contact Material** | Rhodium (Provides long life and stability) | | **Switching Voltage** | Max 200 VDC / 140 VAC | | **Switching Current** | Max 0.5 Amps | | **Carry Current** | Max 1.0 Amps | | **Contact Rating** | 10 Watts | | **Glass Length** | ~10.0 mm (Subminiature size) | | **Operating Time** | < 0.5 ms | --- ### 2. Breakdown of the Part Number The alphanumeric code provides specific details about the construction and sensitivity: * **M2RR:** Refers to the specific series of reed switch (Meder Reed). * **10:** Indicates the glass length of the switch (approx. 10mm). * **R2:** Defines the contact material or specific plating (usually Rhodium for high reliability). * **/Q:** Often indicates a specific quality grade, testing requirement, or an "Automotive Grade" qualification (AEC-Q200 compliant). --- ### 3. Key Electronic Characteristics * **Hermetic Sealing:** The contacts are sealed in an inert gas atmosphere within a glass envelope, making them immune to corrosion, dust, and moisture. * **Magnetic Actuation:** It does not require power to operate; it is triggered by the presence of a magnetic field. * **Low Contact Resistance:** Due to the Rhodium plating, the initial contact resistance is extremely low (typically < 150 mOhms). * **High Life Expectancy:** Capable of millions of switching cycles at low loads. --- ### 4. Common Applications 1. **Industrial:** Limit switches for pneumatic cylinders and robotic arms. 2. **Automotive:** Seatbelt buckle detection and fluid level sensing (coolant/brake fluid). 3. **Security:** Magnetic door and window sensors. 4. **Medical:** Non-contact switching in specialized diagnostic equipment. ---