The term **70CWC** primarily refers to the **KEMET 70 Series (specifically the 70CWC variant)**, which belongs to a class of high-performance **Feed-Through Filters** and **Capacitors** used for EMI/RFI suppression. These components are critical in electronic circuits where high-frequency noise needs to be eliminated while allowing high-current power to pass through. --- ### 1. Key Technical Specifications The 70CWC series is generally characterized by its "L-Circuit" or "C-Circuit" configuration, designed to handle significant current loads. | Feature | Description | | :--- | :--- | | **Component Type** | Feed-Through Capacitor / EMI Filter | | **Current Rating** | Typically 10A to 100A (depending on sub-model) | | **Voltage Rating** | Ranges from 50VDC to 500VDC / 125VAC | | **Mounting Style** | Threaded / Bulkhead Mount | | **Dielectric Material** | Typically Ceramic (X7R or similar) | | **Termination** | Silver plated or Solder-in | --- ### 2. Functional Anatomy The "70CWC" designation defines the physical and electrical housing of the part: 1. **The Ceramic Dielectric:** Inside the metal housing is a ceramic sleeve that acts as the capacitor. It shunts high-frequency noise to the ground. 2. **The Central Conductor:** A thick metal rod passes through the center, allowing high DC or low-frequency AC current to flow with minimal resistance. 3. **The Housing (Case):** The outer metal shell acts as the ground connection. In the 70CWC, this is usually a hex-head threaded body for easy installation into a chassis or shielded box. --- ### 3. Common Applications These parts are not found in consumer smartphones; they are industrial-grade components used in: * **Military Communications:** Shielding radios from engine or power supply noise. * **Medical Equipment:** Preventing interference in sensitive imaging or monitoring devices. * **Aerospace:** Ensuring flight controls are not affected by cockpit electronics. * **Industrial Power Supplies:** Filtering the output of high-current switching regulators. --- ### 4. Part Number Breakdown (Typical) While KEMET/Cornell Dubilier numbering varies, the 70CWC code generally follows this logic: ```markdown 70 - Series (Thread size/Housing style) C - Capacitance Code (e.g., 0.01µF to 1.0µF) W - Working Voltage Rating C - Circuit Configuration (Standard C-type filter) ``` ---