The **MV15T2CG-R** is a specific model of an **AC/DC Motor Protector** (or Thermal Cut-Off device), commonly used in industrial and automotive applications to prevent electrical components from overheating. It belongs to a class of bimetallic thermostats designed for high-current protection. --- ## Technical Specifications & Parameters The electronic performance of the MV15T2CG-R is defined by its thermal response and electrical load capacity. | Feature | Specification Details | | :--- | :--- | | **Component Type** | Bimetallic Thermal Protector / Motor Protector | | **Rated Voltage** | Typically 125V AC / 250V AC (Application dependent) | | **Rated Current** | Usually ranges from 5A to 15A (indicated by the '15' in the code) | | **Action Temperature** | Specific to the "CG" coding (often calibrated between 90°C to 150°C) | | **Contact Type** | Normally Closed (NC) - Opens circuit upon reaching threshold | | **Reset Type** | Automatic reset (Resets once cooled below differential temperature) | --- ## Internal Electronic Mechanism The device functions as a mechanical switch triggered by thermal energy rather than a solid-state electronic gate. ### 1. The Bimetallic Disc The core electronic part is a **Snap-action Bimetallic Disc**. This disc is made of two different metals bonded together with different coefficients of thermal expansion. When the current flow causes heat (or ambient temperature rises), the disc "snaps" to the opposite curvature. ### 2. Contact Points * **Stationary Contact:** Fixed to the lead wire. * **Movable Contact:** Attached to the bimetallic strip. * **Material:** Usually Silver-alloy to prevent welding and minimize electrical resistance at high loads. ### 3. Heating Element (Optional) In some MV series protectors, there is a small internal heater wire. This allows the device to react not just to ambient motor temperature, but also to **overcurrent conditions** (I²R heating). --- ## Typical Applications The MV15T2CG-R is integrated into the windings or the casing of the following electronic systems: 1. **AC Motors:** Used in vacuum cleaners, washing machines, and water pumps. 2. **Transformers:** Protects the primary coils from melting during a short circuit. 3. **Automotive Electronics:** Used in window lift motors or wiper motors where a stall condition could cause a fire. 4. **Battery Packs:** Prevents thermal runaway during high-speed charging. --- ## Part Number Breakdown (General Convention) | Code | Meaning | | :--- | :--- | | **MV** | Series Identifier (Motor Protector) | | **15** | Current Rating (15 Amps) | | **T2** | Terminal/Mounting configuration | | **CG** | Temperature calibration code | | **R** | RoHS Compliant / Revision indicator | ---