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
RF filters which provide high attenuation in both ...
RF filters which provide high attenuation in both differential and common mode Their extended low frequency performance makes them particularly suitable for industrial frequency converters, motor drives and switch mode power supply applications Constructed using a combination of X2 and ...
Single-phase filter Broadband noise suppression in common and ...
Single-phase filter Broadband noise suppression in common and differential mode Easy assembly through faston connectors Fast chassis mounting Single Stage: Very compact design Single-Stage Advanced: Improved differential mode noise attenuation Two-Stage: Extreme differential and common mode noise attenuation ...
High insertion loss over a wide frequency range ...
High insertion loss over a wide frequency range High asymmetrical interference suppression Ideal for supply-side suppression of frequency converters Screened by sheet steel enclosure Din rail mount25mm2 spring tension clamps Dual earth connection with standard tab connector 6.3x0.8mm.
FN2020 filters are designed for easy and fast ...
FN2020 filters are designed for easy and fast chassis mounting and are also avaialble as B versions, the Medical option and A version the Safety option All FN2020 filters provide a general purpose attenuation performance, based on chokes with high ...