The **M2AC-A43-R** is a specific part number typically associated with **M12-style Industrial Circular Connectors**, often used in automation, sensors, and robotics. Specifically, this part is part of the **CUI Devices (formerly specialized by various electronic distributors)** line of high-reliability interface components. --- ### ## Technical Specifications Overview The M2AC-A43-R is a female, right-angle, A-coded M12 connector designed for PCB (Printed Circuit Board) mounting. | Feature | Specification | | :--- | :--- | | **Connector Type** | M12 (Circular) | | **Orientation** | Right-Angle (90°) | | **Gender** | Female (Receptacle) | | **Coding** | A-Coding (Standard for sensors/DC power) | | **Number of Pins** | 4 Pins | | **Mounting Type** | Through-Hole (PCB) | | **Shielding** | Shielded | | **IP Rating** | IP67 (Dust tight and water immersion) | --- ### ### Detailed Component Analysis #### 1. A-Coding Logic In the world of M12 connectors, "Coding" refers to the mechanical keying that prevents incorrect connections. * **A-Coding:** The most common variety. It is primarily used for sensors, actuators, motors, and most other standard DC devices. #### 2. Physical Construction * **Contacts:** Usually made of copper alloy with gold plating to ensure low contact resistance and prevent oxidation in harsh environments. * **Housing:** Typically high-temperature plastic (PBT or Nylon) capable of withstanding wave soldering temperatures. * **Shell:** Nickel-plated brass or zinc alloy, providing durability and grounding for the shielding. #### 3. Electrical Characteristics * **Current Rating:** Generally rated for **4A** per contact. * **Voltage Rating:** Typically rated for **250V AC/DC**. * **Insulation Resistance:** Usually $\ge 100\,M\Omega$. --- ### ### Typical Application Circuitry When integrating the M2AC-A43-R into a PCB design, the pinout follows the international standard for 4-pin A-coded connectors: ```text Pin 1: +VDC (Brown) Pin 2: Input/Output 2 (White) Pin 3: -GND (Blue) Pin 4: Input/Output 1 (Black) ``` --- ### ### Key Advantages * **Ruggedness:** The metal shell and IP67 rating make it ideal for industrial "wash-down" environments. * **Space Saving:** The right-angle design allows for lower profile enclosures where vertical space is limited. * **EMI Protection:** The shielded housing helps protect signal integrity against electromagnetic interference from nearby industrial motors or power lines.