Filters
Products (4)
BNX002-01 - 10A Block-Type EMI Filter, 50V | Murata
The Murata BNX002-01 is a 10 A SMD/block-type EMI suppression filter (EMIFIL) rated at 50 V DC, integrating a through-type capacitor and monolithic chip capacitors inside a single 4-lead block to deliver 5th-order low-pass attenuation from 1 MHz to 1 GHz. It targets DC power-line noise suppression on high-current rails where discrete LC networks would consume too much PCB area. An EMI filter (Electromagnetic Interference filter), also called an EMIFIL, is a passive LC network that shunts conducted noise to ground and blocks high-frequency components from propagating along a power or signal line. EMI filters sit within the broader hierarchy of passive filters -> EMI suppression components -> EMC compliance devices. The BNX series from Murata is widely recognized as a benchmark for high-current DC-line filtering in industrial and automotive-grade equipment. Key features include 10 A continuous current handling, 50 V DC rated voltage, an insertion-loss profile exceeding 40 dB across the 1 MHz to 1 GHz conducted-noise bands, and a 4-lead through-hole block with a maximum height of 13.0 mm. The internal feedthrough capacitor architecture minimizes equivalent series inductance (ESL), enabling broadband attenuation in a footprint far smaller than discrete Pi- or T-filter implementations. Technically, the BNX002-01 stacks a feedthrough capacitor with multiple monolithic ceramic capacitors in a single metal-housed block. The grounded outer case acts as the common-mode shunt, while the internal LC ladder forms a 5th-order low-pass response. This topology achieves high differential-mode attenuation without the leakage current or saturation concerns of common-mode chokes used at high currents. Typical applications include DC power-line noise filtering in factory-automation (FA) controllers, office-automation (OA) equipment base supplies, industrial PLCs, automotive ECU power rails, and any high-current 24 V/48 V bus where the design must meet conducted-emission standards such as CISPR 11/22 or FCC Part 15. Its 10 A rating suits servo amplifiers, motor-driver pre-regulators, and PoE power stages. When designing with the BNX002-01, place it as close as possible to the DC input terminal or the connector pin and bond its metal case to chassis/power ground through multiple vias. The internal capacitors can be damaged if input polarity is reversed, so always confirm the input terminal marking before applying power, and keep the case isolated from signal ground to avoid ground loops. This page synthesizes distributor pricing, drop-in alternatives within the Murata BNX family, and practical PCB-layout guidance not found on a single Murata datasheet page.
EMI8143MUTAG - 6-Line Common Mode Filter w/ ESD | onsemi
The onsemi EMI8143MUTAG is an integrated 6-line common-mode filter (LC EMI filter) with built-in TVS-style ESD protection diodes, designed in a compact UDFN-style surface-mount package intended for HDMI, USB, and other high-speed multi-line interfaces. The device channels three differential signal pairs (6 lines) and combines a common-mode choke for EMI noise suppression with steering diodes that shunt ESD transients to ground, targeting the TMDS lines in HDMI ports and similar high-speed links. The integrated approach reduces board area compared to discrete CMC plus TVS arrays. A common mode filter (CMC, also known as a common mode choke) is a passive component placed in series with a differential signal pair to attenuate common-mode noise while passing differential-mode signals. CMCs are a category within EMI/RFI filters, sitting in the broader power-management and circuit-protection taxonomy of signal-conditioning components. By integrating ESD protection into the same package, parts like the EMI8143 eliminate a separate protection diode array, simplifying layout and reducing parasitic inductance between the filter and the protection element. The EMI8143 targets 100 mA per-line current handling and adds typically 6 ohm DCR, with a typical 15 dB common-mode attenuation specification. The integrated ESD diodes are designed to clamp fast transients on the signal lines and protect downstream HDMI transmitters/receivers. Because HDMI TMDS lines operate at up to 6 Gbps (HDMI 2.0) and the CMC must not distort the differential signal, designers should review the differential-mode insertion loss and Sdd21/Scc21 plots in the manufacturer datasheet to confirm margin at the operating data rate. Typical applications include HDMI ports on the device side (source/sink), DisplayPort interfaces, USB 3.0 high-speed lines, Mobile High-Definition Link (MHL), and other consumer-electronics interfaces where both EMI compliance and ESD robustness are required by HDMI CTS and USB-IF compliance programs. The compact footprint also benefits portable and wearable HDMI dongles, set-top boxes, and TV main boards. When designing with the EMI8143, place the filter as close as possible to the external HDMI connector so that the ESD diodes provide maximum protection to upstream components. Ground the TVS common pin to a low-impedance chassis or digital ground, and follow onsemi's recommended PCB layout to maintain the differential-mode signal integrity through the choke.
HR2220V801R-10 - 800Ω 100MHz 8A Ferrite Bead 2220 | Laird
The Laird HR2220V801R-10 is a high-bias retention surface-mount ferrite chip bead designed for power-line EMI suppression in densely packed DC power distribution networks. The device exhibits an impedance of 800 Ω at 100 MHz with a 1 power-line channel configuration, supports up to 8 A continuous current, and presents a maximum DC resistance of 10 mΩ per line, packaged in the industry-standard 2220 (5650 Metric) case. Ferrite beads are passive EMC components that use lossy ferrite material to dissipate high-frequency noise as heat. They behave as frequency-dependent resistors: at low frequencies they appear nearly transparent, while at high frequencies (typically above a few tens of MHz) their impedance rises sharply, attenuating common-mode and differential-mode noise on power rails. The 'high-bias retention' construction maintains the rated impedance even when the bead is subjected to strong DC bias current, making it ideal for high-current power rails where conventional ferrite beads would saturate and lose attenuation. Key electrical specifications include 800 Ω nominal impedance at 100 MHz test frequency, 8 A continuous current rating, 10 mΩ maximum DC resistance, and operating temperature from -55 °C to +125 °C. The 2220 EIA footprint (5.6 mm × 5.0 mm) enables compact PCB implementation, while the monolithic multilayer construction provides mechanical robustness and consistent electrical performance. This part is engineered for power-rail filtering in telecom equipment, industrial control modules, and automotive electronic control units where high-bias immunity is critical. The 8 A current rating comfortably supports processor cores, FPGA banks, and high-current POL converter outputs without saturation. Designers frequently pair this bead with bulk-decoupling capacitors to form a π-filter that combines high-frequency attenuation with low-frequency energy storage. When designing with the HR2220V801R-10, ensure the working current remains below 80% of 8 A under worst-case temperature to avoid saturation-induced impedance loss. Place the bead as close to the connector entry or switching node as practical, with the ground return path kept short to maximize common-mode choke effectiveness.
MPZ1608S601ATA00 - 600Ω 100MHz 1A Power Ferrite Bead 0603 | TDK
The TDK MPZ1608S601ATA00 is a 600 Ω @ 100 MHz surface-mount chip ferrite bead designed for power-line noise suppression, packaged in an industry-standard 0603 (1608 metric) case. Rated for 1 A continuous current with a maximum DC resistance of 150 mΩ, this bead provides high impedance in the MHz-to-GHz range while maintaining low loss at DC, making it ideal for decoupling high-current digital rails without significant voltage drop. A ferrite bead is a passive electromagnetic interference (EMI) suppression component that combines a ferrite material with conductor windings. In the frequency domain, ferrite beads exhibit high AC impedance to attenuate high-frequency noise while passing DC current with minimal loss. As a category, ferrite beads sit within the broader hierarchy of EMI suppression components, alongside common-mode chokes, EMI filters, and LC filters, and are sub-categorized as either signal-line or power-line variants. Power-line ferrite beads such as the MPZ1608 series are optimized for higher current handling and lower DC resistance compared to signal-line parts. Key specifications include 600 Ω ±25% impedance at 100 MHz, a 1 A rated current, 150 mΩ maximum DC resistance, and an operating temperature range of -55 °C to +125 °C. The 0603 footprint (1.6 mm × 0.8 mm × 0.8 mm) supports dense PCB layouts, while the surface-mount termination enables standard reflow soldering. According to the TDK catalog, the MPZ series targets countermeasures against everything from general signals to high-speed signal lines, offering various frequency characteristics across five different ferrite materials. Technically, the MPZ1608S601ATA00 uses TDK's high-frequency ferrite material that exhibits peak impedance in the 100 MHz region with gradual roll-off, suppressing conducted EMI on power rails feeding microcontrollers, FPGAs, and switching regulators. Its low DCR minimizes the voltage drop across the bead, preserving regulation accuracy on high-current supplies. Typical applications include DC power line filtering in portable devices, USB and HDMI interface filtering, smartphone RF module decoupling, and noise suppression on switching regulator outputs. In automotive infotainment and industrial control, similar parts (automotive-grade MPZ1608S601ATD25) are used. When designing with this bead, place it as close as possible to the IC power pin or connector to maximize noise suppression effectiveness. Ensure the rated current (1 A) is not exceeded under worst-case load, as saturation will reduce impedance and noise attenuation. This page synthesizes distributor pricing from LCSC, DigiKey, Mouser, TTI, and Newark, alongside verified drop-in alternatives and practical PCB layout notes not aggregated on any single distributor page.