EMI Filters & Protection shielding materials offer a wide range of products from leading industry brands such as TDK, Schaffner, TE Connectivity, Wurth Elektronik and Laird Technologies as well as our RS PRO brand for even better value.
EMI filters and EMI shielding protection products can be attached to devices or circuits to reduce high-frequency electromagnetic noise transmitted through conduction that may cause interference with other devices. This means that EMI filters can remove any unwanted current conducted through cables and wires but at the same time still permitting other wanted currents to flow. Some countries also have legal requirements that determine the approved type and amount of EMI that devices may generate, so that they do not interfere with other equipment. These regulations can therefore drive the decision to use a filter to keep harmful EMI out of a device.
EMI (electromagnetic interference) is present in all areas of electronics and disrupts electronic operations and electronic devices from emissions. EMI can have a big effect on electronic operations and communications in various industries as EMI travels in waves and can cause devices and equipment to malfunction. In order to reduce the effects of EMI, you can use EMI filters and shielding protection devices that can help remove electromagnetic radiation waves. These filters can also prevent EMI from escaping and interfering with other sensitive equipment close by. High reliable EMI filters and protection shielding products are designed to consistently meet requirements and are essential to many industries and businesses.
Effective EMI filtering is necessary for almost every modern electronic device, including devices that generate their own EMI, as well as devices that are sensitive to EMI within their environment. Popular devices include:
Ferrite beads are passive components that suppress high-frequency noise in electronic circuits. They consist of a ferrite core material that exhibits high permeability at high frequencies. When a high-frequency current flows through a wire passing through the bead, the ferrite core generates a magnetic field that opposes the current flow, effectively attenuating the high-frequency noise.
Ferrite rings and sleeves function similarly to ferrite beads, but they are designed to be installed over cables or wires. The ferrite material in the ring or sleeve forms a magnetic circuit around the conductor, suppressing high-frequency noise that travels along the cable.
Common mode chokes are specialised inductors designed to suppress common-mode noise, a type of EMI that affects both conductors of a differential pair equally. They consist of two windings wound on a common core, such that the magnetic fields generated by the two windings cancel each other out for differential-mode signals but add up for common-mode noise. This allows common-mode chokes to effectively suppress common-mode noise without affecting the desired differential-mode signal.
Feedthrough capacitors are used to filter high-frequency noise on cables passing through enclosures or shielded compartments. They consist of a capacitor connected between the cable's inner conductor and the enclosure or shield. The capacitor provides a low-impedance path for high-frequency noise to ground, effectively bypassing the noise around the enclosure and preventing it from entering or exiting.
Power line filters are designed to suppress conducted EMI on AC and DC power lines. They typically consist of a combination of capacitors and inductors that filter out high-frequency noise. Power line filters are commonly used in a wide range of electronic devices to protect them from EMI generated by external sources, such as power grids and nearby electronic equipment.
RC network capacitors are simple filters consisting of a resistor and a capacitor connected in series. They are often used to filter out high-frequency noise on signal lines. The capacitor provides a low-impedance path for high-frequency noise to ground, while the resistor limits the current flow and prevents the capacitor from shorting out the signal.
Shielding sheets and strips are made of conductive materials, such as copper or aluminium, and are used to create barriers against electromagnetic fields. They can be used to enclose entire devices or individual components to prevent EMI from entering or escaping. Shielding is particularly important for sensitive electronic devices that are susceptible to interference.
Signal filters are designed to selectively pass or attenuate specific frequencies in a signal. They can be used to remove unwanted noise or interference from a signal or to isolate specific frequency bands for further processing.
Sine wave filters are specialised filters designed to remove harmonics and other distortions from a sine wave signal. They are commonly used in applications where a clean sine wave is required, such as audio systems and power supplies.
The significance of EMI filtering reverberates across diverse industrial sectors, where the repercussions of electromagnetic interference can be severe. Let's explore some key applications:
Selecting the ideal EMI filter requires careful consideration of several factors:
RS stands as your trusted source for EMI filters in Australia. As a leading distributor, we offer an extensive range of high-quality EMI filters from renowned brands like TDK, EPCOS, and Murata. Our team of experts is ready to provide technical support, assisting you in selecting the perfect filter for your specific application.
Ordering EMI filters from RS is a straightforward process. Browse our extensive online catalogue, select the products you need, and place your order. We offer fast and reliable delivery across Australia. For delivery details, please refer to our Delivery Page.
Refine search results with advanced filtering options, select how you want to view products, and more.
