| Circuit Options | Current | Capacitance Values | Frequencies |
|---|---|---|---|
| C, Pi | 10.0 to 20.0A | 100 to 4,000 pF | 1 MHz to 1 GHz |
Features and Benefits
As devices in the aerospace, defense and industrial industries become more compact while electromagnetic compatibility (EMC) compliance standards become more stringent, designers need high-density solutions that provide reliable EMI attenuation across broad frequency ranges.
Compact, durable board-mounted EMI filters can help reduce the size of devices, improve system performance and extend product life cycles. Rugged designs optimized for harsh conditions improve flexibility and simplify design work across a wide range of applications. Compliance with EMC standards helps eliminate the risk of regulatory penalties or market exclusion.
Surface-Mount EMI Filters from Molex provide high performance and exceptional reliability, enabling use with a variety of applications by supporting frequencies up to 1 GHz, current up to 20.0A and up to 200V DC. The SMT design eliminates the need for bulky through-hole filters, while support for automated reflow soldering assembly processes reduces costs and improves manufacturing consistency. Rugged and durable, these EMI filters provide reliable and consistent attenuation across a wide temperature range of -55 to +125°C, enabling use in aerospace, defense and industrial applications subject to harsh conditions.
Applications by Industry
Cockpit controls
First- and business-class seats
Hydraulic and control systems
Military vehicles
Power supplies
Radar systems
Computer and peripheral equipment
Digital and switching equipment
Internet protocol digital subscriber line access multiplexer (IP DSLAM) systems
Microwave, data and signal lines
This is not a definitive list of applications for this product. It represents some of the more common uses.
Frequently Asked Questions
What are Surface-Mount EMI Filters?
Surface-Mount EMI Filters are compact, board-level components designed to suppress EMI at both high and low frequencies. They are optimized for applications requiring precise EMI mitigation in high-current, high-efficiency designs, such as telecommunications, aerospace and power electronics. Their small footprint and SMT compatibility make them ideal for high-density circuits, ensuring compliance with stringent EMC regulations while maintaining signal integrity.
How do I determine the correct attenuation value for my application?
To select the appropriate attenuation value for an EMI filter, identify the noise frequencies affecting your system, evaluate the filter’s insertion loss to ensure sufficient suppression, and confirm impedance matching to help prevent signal degradation and maintain system performance.
What circuit configurations are available for Molex Surface-Mount EMI Filters?
Molex offers two circuit configurations to address diverse RF design needs: feed-through (FT, also known as C style) for basic EMI suppression in compact layouts, and Pi (π) for enhanced attenuation across a broader frequency range, providing flexibility for varying application requirements.
How do Molex Surface-Mount EMI Filters perform in high-frequency applications?
Molex filters deliver high insertion loss (up to 70 dB) over a broad frequency range, ensuring robust EMI suppression for RF-sensitive designs. Their low parasitic inductance and capacitance minimize unwanted resonance, making them suitable for high-speed communication systems and other essential applications. Reliable performance is maintained even in high-power-density systems and under challenging environmental conditions.
Why are Molex Surface-Mount EMI Filters ideal for high-density RF applications?
Molex filters combine a compact SMT design with high current (up to 20.0A) and voltage ratings (up to 200V DC), optimizing board space without sacrificing performance. Their compatibility with automated SMT reflow-solder assembly ensures consistent production quality, while their ability to operate in extreme environments (-55 to +125°C) enhances reliability in high-density, high-performance RF systems.
