The **W2PE-1BA-R/UL** is a specific model of a **Miniature Circuit Breaker (MCB)** or **Circuit Protector** manufactured by **IDEC Corporation**. It is designed to protect electronic equipment from overcurrent and short circuits. --- ### ## Technical Specifications Below are the primary electronic and physical characteristics of the W2PE-1BA-R/UL: | Property | Description | | :--- | :--- | | **Manufacturer** | IDEC Corporation | | **Product Series** | W Series (Miniature Circuit Protectors) | | **Poles** | 1-Pole (Single pole) | | **Terminal Style** | Tab Terminal (Push-on type) | | **Protection Method** | Hydraulic-Magnetic (provides consistent tripping regardless of ambient temperature) | | **Approval** | UL/c-UL Recognized (per UL1077 standards) | | **Current Rating** | Typically ranges from 0.05A to 20A (Specific to order) | | **Voltage Rating** | 250V AC / 50V DC (Maximum) | --- ### ### Key Internal Components The "Electronic" nature of this device is primarily mechanical and electromagnetic. Here is how the parts function: 1. **Solenoid Coil:** The core "sensor" of the device. When current flows through the coil, it creates a magnetic field. 2. **Hydraulic Tube & Dashpot:** Inside the solenoid is a tube containing a spring-loaded core and silicone fluid. Under moderate overcurrent, the core moves through the fluid (creating a time delay). 3. **Armature:** Once the core moves far enough or a high-current short circuit occurs, the magnetic field pulls the armature. 4. **Trip Mechanism:** The armature releases the latch, forcing the electrical contacts to snap open. 5. **Arc Chute:** A series of metal plates used to extinguish the electrical arc generated when the contacts separate under load. --- ### ### Part Number Breakdown (W2PE-1BA-R/UL) Understanding the suffix codes helps identify the specific configuration: * **W2P:** The series designation (Slim/Miniature type). * **E:** Environmental/Mounting style. * **1:** Indicates a **1-Pole** configuration. * **BA:** Refers to the **Delay Curve** (Medium delay, commonly used for general electronic equipment). * **R:** Indicates **Flush Silhouette** or specific terminal orientation. * **UL:** Compliance with UL (Underwriters Laboratories) standards for safety. --- ### ### Common Applications * **Industrial Control Panels:** Protecting PLC outputs. * **Telecommunications:** Guarding sensitive rack-mounted gear. * **Medical Equipment:** Providing precise trip points for safety. * **Power Supplies:** Secondary side overcurrent protection.