The **M2TS-70-R2** is a specialized electronic component, typically identified as a **high-reliability thermal switch** or a **thermal protector**, often utilized in industrial, aerospace, or military-grade power supplies and motor control systems. Below is a breakdown of its electronic characteristics and specifications. --- ### 1. Key Technical Specifications The "M2TS" series generally refers to a snap-action thermal switch designed for surface or chassis mounting. | Parameter | Specification (Typical) | | :--- | :--- | | **Switch Type** | Normally Closed (NC) or Normally Open (NO) | | **Operating Temperature** | 70°C (Fixed Set Point) | | **Reset Type** | Automatic (Resets after cooling) | | **Contact Rating** | 1A to 5A at 120VAC / 24VDC | | **Tolerance** | ±5°C | | **Mounting Style** | Stud Mount / Bolt-on (R2 variant) | --- ### 2. Functional Components * **Bimetallic Disc:** The core "sensor." It consists of two bonded metals with different expansion coefficients. At 70°C, the disc "snaps" to change the circuit state. * **Contacts:** Usually silver or gold-alloy plated to ensure low contact resistance and prevent oxidation. * **Housing:** Typically a ceramic or high-temperature PPS (Polyphenylene Sulfide) resin to withstand extreme heat without melting. * **Terminals:** Usually solder tabs or lead wires (the "R2" suffix often denotes a specific lead length or terminal orientation). --- ### 3. Circuit Application In an electronic system, the M2TS-70-R2 is used for **Over-Temperature Protection (OTP)**. #### Typical Wiring Diagram Logic: ```text [Power Source] ---- [M2TS-70-R2 (NC)] ---- [Load/Heatsink Fan] ``` * **Under 70°C:** The switch is closed; the device operates normally. * **At 70°C:** The bimetal disc snaps, opening the circuit and cutting power to the load to prevent fire or component failure. * **Cool Down:** Once the temperature drops (e.g., to 55°C), the disc snaps back, and the system resumes operation. --- ### 4. Comparison of Variants The "R2" suffix is a mechanical and electrical identifier within the manufacturer's catalog (often related to Selco or similar thermal component brands). | Feature | R2 Designation | Standard M2TS | | :--- | :--- | :--- | | **Lead Wires** | Usually features insulated leads | Standard solder terminals | | **Mounting** | Typically features an integrated bracket | May be a bare probe | | **Durability** | Rated for higher vibration environments | Standard commercial grade | ---