The **F2TS-65-R/Q** refers to a high-performance **Thermal Trip Switch (Thermal Protector)**, typically utilized in industrial automation, power electronics, and motor protection. It is designed to interrupt an electrical circuit when the temperature reaches a specific threshold. --- ### 1. Key Technical Specifications | Parameter | Specification (Standard) | | :--- | :--- | | **Model Series** | F2TS | | **Trip Temperature** | 65°C | | **Contact Type** | Normally Closed (NC) - Opens on Temp Rise | | **Voltage Rating** | AC 250V / DC 24V (typical) | | **Current Rating** | 5A to 10A (Model dependent) | | **Suffix "R/Q"** | Refers to lead wire type and terminal orientation | --- ### 2. Functional Components The device operates on a **Bimetallic Disc** principle. Here are the internal electronic/mechanical parts: 1. **Bimetal Disc:** The sensing element composed of two metals with different expansion coefficients. At 65°C, the disc snaps to an inverted shape. 2. **Contact Points:** Usually silver-plated or gold-clad to ensure low electrical resistance and prevent oxidation. 3. **Insulating Case:** Typically made of high-temperature PPS (Polyphenylene Sulfide) or ceramic to withstand thermal stress. 4. **Terminal Leads:** * **R/Q Specification:** Often indicates specific mounting styles, such as "Radial" or "Quick-connect" terminals, allowing for integration onto PCBs or via wire harnesses. --- ### 3. Application Use Cases * **Motor Protection:** Embedded in motor windings to prevent burnout due to overheating. * **Power Supplies:** Acts as a secondary safety layer for high-wattage AC/DC converters. * **Battery Packs:** Monitors cell temperature during rapid charging cycles. * **HVAC Systems:** Used as a limit switch for small heating elements. --- ### 4. Circuit Diagram Representation In a standard circuit, the F2TS-65 is placed in series with the load or the coil of a contactor. ```mermaid graph LR A[Power Source] --> B[F2TS-65-R/Q] B -- "Closed < 65°C" --> C[Load/Motor] B -- "Open > 65°C" --> D[Circuit Broken] ```