The part number **CA2-B0-14-440-121-D** refers to a high-quality **Hydraulic-Magnetic Circuit Breaker** manufactured by **Carling Technologies** (specifically from their C-Series line). Below is a detailed breakdown of its specifications and electrical characteristics. --- ### 1. Part Number Breakdown The alphanumeric code follows Carling's specific nomenclature to define the mechanical and electrical properties: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | `CA` | C-Series Circuit Breaker (Compact, high amperage) | | **Actuator** | `2` | Two-pole configuration (Handles two lines) | | **Polls/Mounting**| `B0` | Series Trip (Current sensing) with screw terminals | | **Delay** | `14` | Medium Delay (Time delay for inductive loads) | | **Rating** | `440` | **4.0 Amperes** current rating | | **Voltage** | `121` | 277VAC (Max) or 80VDC (Max) | | **Terminals** | `D` | 10-32 Screw Terminals with bus connectors | --- ### 2. Key Electrical Specifications The CA-Series is designed for precision and reliability in harsh environments. * **Current Rating:** 4.0 Amps. * **Voltage Rating:** Supports up to 277V AC or 80V DC. * **Interrupting Capacity:** Typically up to 5,000 Amps (AIC). * **Trip Mechanism:** **Hydraulic-Magnetic.** Unlike thermal breakers, these are not affected by ambient temperature. They trip based purely on the magnetic field generated by the current. * **Delay Curve 14:** This provides a "Medium Delay," which allows for brief nuisance surges (like a motor starting up) without tripping immediately, but provides fast protection against short circuits. --- ### 3. Physical & Mechanical Features * **Form Factor:** Compact design suitable for panel mounting. * **Number of Poles:** 2 (The unit will disconnect two separate lines simultaneously if a fault is detected on either). * **Actuator Type:** Handle/Toggle switch (White with "On/Off" markings). * **Terminal Type:** Standard 10-32 screw terminals, ensuring a secure vibration-resistant connection. --- ### 4. Typical Applications Because of the Hydraulic-Magnetic technology and the medium time delay, this specific breaker is commonly used in: * **Telecommunications:** Power distribution units (PDUs). * **Marine Electronics:** Main panels and motor circuits. * **Industrial Automation:** Protection for sensitive control circuits. * **Renewable Energy:** Inverters and battery management systems. ---