What is PCB Shielding Cans ?
PCB shielding cans, also known as board level shields or PCB EMI shields, are used for isolating circuits by creating a Faraday cage directly on the board that encloses the circuit to be shielded. There are many different types of board level shields but they can be thought of in two broad categories: one-piece and two-piece board level EMI shields. The term PCB shielding can typically refers to a one-piece shield that is soldered directly to the PCB, providing effective circuit board shielding.
What is EMI Shielding Cans ?
An EMI Shielding Can (also called a Shield Can or EMI Can) is a small, hollow, metal enclosure that is placed directly over sensitive components on a printed circuit board (PCB) to protect them from electromagnetic interference (EMI). It's a classic, reliable, and reworkable solution to a fundamental challenge in modern electronic design.
When are Shielding Cans the Best Choice?
Rework is Anticipated: During product development, prototyping, or for equipment that may need field service.
EMI Levels are High: In high-power or high-frequency circuits (e.g., RF power amplifiers, switching regulators).
Mechanical Robustness is Needed: In industrial, automotive, or aerospace applications where the device may be subjected to harsh handling.
Performance is Paramount: When you cannot risk the potential variability of a conformal coating.
Thermal and Shielding are Both Needed: When you need a simple, integrated solution for both problems.
PCB Shielding Can vs. EMI Shielding Can: Understanding the Difference
In summary, while both PCB Shielding Cans and EMI Shielding Cans serve the purpose of mitigating electromagnetic interference, they differ in scope and application. PCB Shielding Cans target localized shielding within a PCB, whereas EMI Shielding Cans encompass broader protection for entire devices or systems. The choice between the two depends on the specific shielding requirements of the electronic components or devices being used. The terms "PCB shielding can" and "EMI shielding can" are used interchangeably in the electronics industry.
shielding cans Advantages
Superior Shielding: Provides the strongest protection against electromagnetic interference.
Easy Access: Removable cover allows for simple testing, debugging, and repairs.
Mechanical Protection: Shields components from physical damage and contamination.
Heat Dissipation: Metal body acts as a heat spreader.
Design Flexibility: Can be custom-fit to shield any specific circuit section.
Applications of Shielding Cans
Wireless & RF Circuits:
- Wi-Fi, Bluetooth, and Cellular modules (4G/5G)
- GPS Receivers
- Radio Transmitters/Receivers
Consumer Electronics:
- Smartphones and Tablets (less common now, but used in older or specific models)
- Smart TVs and Set-Top Boxes
- Gaming Consoles
- High-Fidelity Audio Equipment
Computing & Data Storage:
- Motherboards (shielding processors, memory, and chipset components)
- Network Interface Cards
- Solid-State Drives (SSDs) and Hard Drive controllers
Automotive Electronics:
- Engine Control Units (ECUs)
- Infotainment and Navigation Systems
- Advanced Driver-Assistance Systems (ADAS sensors and radar)
Industrial & Medical:
- Industrial Control Systems (PLCs)
- Medical Diagnostic Equipment (e.g., patient monitors, imaging systems)
- Precision Measurement Instruments
Specifications/Data
| Conductive aluminum foil | ||
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| Materials | Conductive Fabric+Conductive Adhesive+Release Paper | |
| Thickness | 0.5mm (Customizable) | |
| Surface Resistance | ≤0.05Ω/inch² | |
| Adhesion Strength | ≥0.7kg/inch | |
| Holding Time | >12H | |
| Vertical Resistance | ≤0.03Ω/sq inch | |
| Working Temperature | 10-80℃ | |
| Shielding Efficiency | 70-85dB (10MHZ-3GHZ) | |
| Conductive copper foil | ||
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| Materials | Copper/Nickel Foil+Conductive Adhesive+Release Paper | |
| Surface Resistance | ≤0.05Ω/inch² | |
| Tack | ≥1.5kgf/inch | |
| Shielding Efficiency | 70-85dB (10MHZ-3GHZ) | |
| Holding Time | >48H | |
| Thermal Conductivity | 380W/(m*k) | |
| Working Temperature | Short Time-20~120℃ Long Time-10~80℃ |
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