The **8345-B02A-R0** is a specific part number for a high-performance **Magnetic-Hydraulic Circuit Breaker** manufactured by **E-T-A**. It is designed for precise overcurrent protection in demanding environments. --- ### 1. Key Technical Specifications Below are the primary electrical and mechanical specifications for this series: | Property | Specification | | :--- | :--- | | **Manufacturer** | E-T-A (Elektrotechnische Apparate GmbH) | | **Product Series** | 8345 (Magnetic-Hydraulic) | | **Number of Poles** | 2-Pole (Indicated by 'B02') | | **Actuator Style** | Toggle or Rocker (model dependent) | | **Current Ratings** | 0.05A to 125A (typical range) | | **Voltage Rating** | Up to 80V DC or 240/415V AC | | **Mounting Type** | Rail or Flange Mount | --- ### 2. Breakdown of the Part Number The alphanumeric code provides specific details about the component's construction: * **8345**: The base series for magnetic-hydraulic circuit breakers. * **B**: Mounting/Terminal style (often refers to flange mounting or specific stud terminals). * **0**: Standard hardware/Standard handle. * **2**: Number of poles (2 protected poles). * **A**: Characteristic curve (Standard delay or instantaneous). * **R0**: Specific revision code or packaging identifier used by the manufacturer. --- ### 3. Core Electronic Features Unlike standard thermal breakers, the 8345 series uses a **Magnetic-Hydraulic** mechanism which offers several advantages: 1. **Temperature Independence**: The trip point is not affected by ambient temperature changes, making it ideal for high-heat environments like server racks or engine rooms. 2. **Delay Curves**: It utilizes a silicone-filled cylinder with a spring-loaded core. Under overload, the core moves through the fluid to provide a time delay; under short-circuit, the magnetic force is strong enough to trip the breaker instantaneously. 3. **High Interrupting Capacity**: Capable of handling significant fault currents (often up to 10,000A) without damage to the device. --- ### 4. Common Applications * **Telecommunications**: Power distribution units (PDUs) and base stations. * **Industrial Automation**: Control panels requiring precise protection. * **Marine & Transportation**: Electrical systems in yachts or specialized vehicles. * **Medical Equipment**: High-reliability power supplies. ---