The **F2TS-7D-R** is a specific electronic component, typically categorized as a **Temperature Sensitive Switch (Thermal Reed Switch)** or a specialized **Thermal Protector**. These devices are designed to open or close a circuit when a specific temperature threshold is reached. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the primary technical characteristics: | Feature | Specification | | :--- | :--- | | **Switch Type** | Reed Switch (Temperature Sensitive) | | **Contact Form** | Form B (Normally Closed - NC) | | **Operating Temperature** | Approximately 70°C (±5°C) | | **Reset Temperature** | Differential of 5°C to 10°C below set point | | **Contact Rating** | Usually around 0.5A to 1.0A (Low Power) | | **Voltage Rating** | Typically 100V AC / 120V DC | --- ### 2. Functional Components The "F2TS" series relies on the interaction between a **Permanent Magnet** and a **Thermosensitive Ferrite**: * **The Reed Switch:** A glass-encapsulated switch containing two metal reeds that react to magnetic fields. * **The Ferrite Core:** This material has a specific "Curie Point." Below this temperature, it is magnetic. Above this temperature, it loses its magnetic properties. * **The Magnets:** Positioned around the ferrite to create a magnetic circuit that holds the reed switch in its default state (Closed). --- ### 3. Operating Principle The device operates based on the change in magnetic permeability of the internal ferrite: 1. **Normal State (< 70°C):** The ferrite is magnetic. The magnetic flux passes through the ferrite and influences the reed switch, keeping the contacts **Closed**. 2. **Trigger State (> 70°C):** The ferrite reaches its Curie point and becomes non-magnetic. The magnetic circuit is broken, and the reed switch springs open, **Breaking** the electrical circuit. 3. **Reset:** Once the temperature drops below the reset point, the ferrite regains magnetism and the switch closes again. --- ### 4. Common Applications Because reed-based thermal switches are hermetically sealed, they are highly reliable in harsh environments: * **Overheat Protection:** Used in power supplies and small motors. * **Industrial Sensing:** Monitoring liquid temperatures in tanks where chemical resistance is needed. * **Home Appliances:** Coffee makers or rice cookers to prevent dry-boiling. ---