Passive Filters

Passive filters are a subtype of passive components that play key roles in the design and function of many electronic circuits. Passive filters help block unwanted frequencies, ensuring the delivery of appropriate frequency characteristics to the main circuit.


We work with respected manufacturers like TDK, Schaffner, TE Connectivity and EPCOS, and stock a range of passive filters under our RS PRO brand for even better value.


Types of passive filters and their common uses



  • Band Pass Filters act as signal gatekeepers, allowing specific frequencies (the ‘passband’) through while blocking signals outside a stated range.


    • They’re often used to clean up signal interference in radio transmission and communications circuits




  • Power Line Filters help prevent degradation in circuit performance when an electronic device is connected to an external power line, minimising conducted frequencies like radio (RFI) or electromagnetic (EMI) interference.


    • They’re found in single phase, three phase or DC (direct current) power applications across a huge range of devices and systems, helping reduce undesired circuit behaviour




  • SAW Filters use transducers to convert electrical input signals to an acoustic wave and back again, and are widely used in mobile phone/tablet touchscreen technologies.


    • Broad operating temperature ranges also make them useful in heavy industrial environments like chemical, optical or thermal processing plants




  • Signal Filters clean up electrical signals through noise reduction processes, often built around multilayer ceramic capacitors, inductors, dielectric resonators and crystals.


    • They’re important components in audio, video, communications and broadband circuitry, and have a number of frequency filter response types including high-pass, low-pass, band-stop, and cut-off



  • Sinusoidal Filters are low-pass components intended to block or impede high-frequency PWM signals, converting them to a smooth wave voltage.




    • Useful for protection against premature circuit damage and component stress, voltage spikes, cable stripping, current loss and overheating


Calibrate new and existing equipment
Get a quote online, quick and easy
Return online within 30 days
Related Products
Chassis mounting RFI filters providing good attenuation in ...
Description:
Chassis mounting RFI filters providing good attenuation in both differential and common mode over the frequency range 600 KHz to 100MHzDurable hermetically sealed construction. Ideal for industrial microprocessor-controlled machine systems and other sensitive electronic equipmentConnection is via 250 (1/4 in) ...
Premium range of EMI filters from Schaffner. The ...
Description:
Premium range of EMI filters from Schaffner. The FN2080 two-stage filters are designed for easy and fast chassis mounting. All filters provide a high conducted attenuation performance, based on chokes with high saturation resistance and excellent thermal behaviour.Can be used ...
The FN402 PCB filter is a single-phase filter ...
Description:
The FN402 PCB filter is a single-phase filter designed for easy and fast PCB-mounting. A selection on amperage ratings and medical types are designed to offer you the desired standard product.Can be used in a wide range of applications such ...
Schaffner single stage filter FN350 is a compact ...
Description:
Schaffner single stage filter FN350 is a compact filter solution for single phase motor drive applications, featuring industrial grade safety terminal blocks for fast and easy installation. High component values for common and differential mode attenuation in in the lower ...