The **ME22XAX-R** is an electromechanical power relay manufactured by Magnecraft (now part of Schneider Electric). It belongs to the **725 Series** of power relays, designed specifically for high-current switching applications and mounting on DIN rails or panels. --- ### 1. Key Technical Specifications The following table outlines the core electronic and mechanical parameters of the ME22XAX-R: | Feature | Specification | | :--- | :--- | | **Contact Configuration** | DPST-NO (Double Pole Single Throw, Normally Open) | | **Contact Rating (Current)** | 25 Amperes | | **Coil Voltage** | 120 VAC (50/60 Hz) | | **Switching Voltage (Max)** | 300 VAC / 28 VDC | | **Mounting Type** | DIN Rail / Surface Mount | | **Terminals** | Screw Terminals | | **Indicator** | Mechanical Flag / Optional LED | --- ### 2. Breakdown of Components #### A. The Coil (Input Side) The "R" in the part number often signifies a specific coil configuration or the presence of a protection/indicator circuit. In this model, the coil is rated for **120V Alternating Current**. When energized, it creates a magnetic field that pulls the armature toward the core. #### B. The Contacts (Output Side) * **DPST-NO:** This means the relay has two separate circuits (Double Pole) that it controls simultaneously. Both are "Normally Open," meaning the circuit is broken until the relay is powered. * **High Capacity:** Unlike signal relays, these contacts are reinforced to handle up to 25A, making them suitable for motor starters and heaters. #### C. Physical Housing The unit is encased in a transparent or semi-transparent polycarbonate cover. This allows technicians to visually inspect the state of the contacts and check for signs of carbon buildup or "pitting" without disassembling the unit. --- ### 3. Common Applications Due to its high amperage rating and 120V coil, the ME22XAX-R is commonly found in: * **HVAC Systems:** Controlling blowers or compressors. * **Industrial Automation:** Actuating heavy solenoids or small motors. * **Lighting Control:** Switching large banks of discharge lamps or LEDs. * **Power Management:** Serving as an interface between a low-power PLC output and a high-power load. --- ### 4. Circuit Diagram Representation ```text 120VAC COIL CONTACTS (25A) +----( L1 )----+ |--/ --| (Pole 1) | | | | +----( N )----+ |--/ --| (Pole 2) ```