The **M2AS1-4113-R/Q** refers to a high-performance **Electromechanical Relay**, typically associated with automotive and industrial power switching applications. This specific part number is often found within the catalogs of manufacturers like **American Zettler** or specialized automotive relay suppliers. --- ### 1. Technical Specifications Below are the typical electronic characteristics of this relay series: | Parameter | Specification (Typical) | | :--- | :--- | | **Contact Form** | SPDT (1 Form C) or SPST (1 Form A) | | **Rated Load** | 30A to 40A at 14VDC | | **Coil Voltage** | 12VDC (Standard) | | **Coil Power** | ~1.6W | | **Contact Material** | Silver Tin Oxide (AgSnO2) | | **Operating Temperature** | -40°C to +125°C | | **Termination** | PCB Mount (Solder Pins) | --- ### 2. Breakdown of the Part Number While nomenclature varies slightly by manufacturer, the code usually breaks down as follows: - **M2AS**: The Series designation (Miniature ISO-standard layout). - **1**: Number of poles (Single Pole). - **4113**: Specific internal configuration regarding coil sensitivity and contact gap. - **R**: Indicates a **Resistor** is suppressed across the coil (used to protect sensitive electronics from "Back EMF" voltage spikes when the relay turns off). - **Q**: Sealed version (Wash-tight) to prevent flux or moisture ingress. --- ### 3. Key Electronic Components & Internal Construction #### A. The Coil (Electromagnet) The "heart" of the relay. When 12V is applied, it creates a magnetic field. Because this part contains the **"R" suffix**, a resistor is wired in parallel with the coil. - **Function:** Absorbs the inductive flyback voltage. - **Benefit:** Prevents damage to the transistor or ECU driving the relay. #### B. The Contacts Made of **Silver Tin Oxide (AgSnO2)**. This material is chosen for: - High resistance to "welding" (sticking). - Excellent conductivity over thousands of cycles. - Ability to handle high inrush currents from motors or lamps. #### C. The Armature & Spring A mechanical assembly that moves when the coil is energized. The "1 Form C" configuration means it has a **Common (COM)**, a **Normally Closed (NC)**, and a **Normally Open (NO)** pin. --- ### 4. Typical Applications * **Automotive Systems:** Power windows, fuel pumps, cooling fans, and horn circuits. * **Industrial Controls:** DC motor switching and power distribution blocks. * **HVAC:** Control boards for blowers and compressors. ---