Common mode Chokes
Inductive Components - EMC Components and Ferrite Cores
What are Common Mode Chokes?
In the transmission system, noise is classified in two ways: one is differential mode noise and the other is common mode noise. A common mode signal (noise) is an unwanted signal as it “carries” no information. A common mode choke is designed to clean common mode noise (signal) generated from either a signal line or power line circuit.
How do Common Mode Chokes Work?
Common mode chokes are used to suppress common mode noise. When a common mode noise enters a circuit with a common mode choke installed, the flux generated by the D+ signal and that by the D-signal enhance each other, generating high impedance and preventing common mode noise from passing.
How to Choose the Right Mode Chokes Work?
Firstly, understand the “problem frequency” and then check whether the key features (like operating temperature, quality requirements), key parameters and dimension (like rated voltage , rated current and Inductance /Impedance”) can meet requirements or not.
Benefits of Laird Performance Materials’ Common Mode Chokes
Constructed from ultra-thin mixtures of iron, nickel and zinc oxides, Laird Steward ferrite common mode chokes are characterized by their size, light weight, low cost, and high reliability. They provide superb EMI reduction while remaining open to normal circuit operation.
Other benefits include:
- High-precision winding construction with spacer or precise multi-layer construction, improve isolation in offending circuits and ensures consistent reliability
- Through-hole and surface-mount installation available upon customer request
- Designs available with ferrite, iron and alloy composite, or ultra-thin nanocrystalline upon request
- Various operating temperatures and current match capabilities over a broad range of inductance values
- Custom designs possible
Common mode Chokes Series
CC1812 Series
Open bottom case construction with samll size, accurate current matching capability over a broad range of inductance value.
CC2824 Series
Open bottom case construction with samll size, accurate current matching capability over a broad range of inductance value .High Current capabilty up to 1.2 A.
CF0504 Series
Multilayer type and small size with a wide frequency range, can be applied on high-speed differential signal interfaces such as HDMI, USB3.0 and DisplayPort.
CF0805 Series
Small Size Multilayer type with a wide frequency range and can be applied on high-speed differential signal interfaces such as HDMI, USB3.0 and DisplayPort.
CH0805 Series
Wire Wound Type Broadband common mode filter for Gbps-level high-speed differential signal interfaces (cut off frequency up to 6GHz) such as HDMI, USB3.0.
CM0805 Series
Wire Wound type with excellent common mode filter characteristics. Impedance for common mode noise can clear 600 Ohm [100MHz], and has good EMC suppression.
CM1206 Series
Wire Wound type with excellent common mode filter characteristics. Impedance for common mode noise can clear 600 Ohm (100MHz), and has good EMC suppression.
CM1210A Series
Wire Wound SMT construction allows performing at high temperature range. High reliability , performance and meet Automotive application requirements.
CM1210B Series
Wire Wound SMT construction allows performing at high temperature range. High reliability , performance and meet Automotive application requirements.
CM1210C Series
Wire Wound SMT construction allows performing at high temperature range. High reliability , performance and meet Automotive application requirements.
CM1812 Series
Open bottom case construction with small size, broadband noise filtering from 100 KHz to 100 MHz with excellent EMI suppression result.
CM1812A Series
Wire Wound SMT construction allows performing at high temperature range. High reliability , performance and meet Automotive application requirements.
CM1812B Series
Wire Wound SMT construction allows performing at high temperature range. High reliability , performance and meet Automotive application requirements.
CM2021 Series
Wire Wound SMT structure allow high rated current. Low DCR with small package.Stable performance under load bias. Excellent impedance vs frequency features
CM2545 Series
Wire Wound SMT and through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM2722 Series
Wire Wound through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM2824 Series
Open bottom case construction with small size, broadband noise filtering from 100 KHz to 100 MHz with excellent EMI suppression result.
CM3032 Series
Wire Wound through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM3421 Series
Wire Wound SMT structure allow high rated current. Low DCR with small package. Stable performance under load bias. Excellent impedance vs frequency features
CM3440 Series
Wire Wound SMT and Through Hole structure allow high rated current and stable performance. Low DCR with small package. Excellent impedance vs frequency features
CM3822 Series
Wire Wound through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM4440 Series
Wire Wound Through Hole structure allow high rated current and stable performance. Low DCR and Excellent impedance vs frequency features.
CM4545 Series
Wire Wound SMT and through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM4732 Series
Wire Wound through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM5022 Series
Wire Wound through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM5441 Series
Wire Wound SMT and Through hole structure allow rated current up to 60A. Low DCR and high performance. Excellent impedance vs frequency features
CM5740 Series
Wire Wound SMT and Through Hole structure allow high rated current and stable performance. Low DCR and Excellent impedance vs frequency features
CM6032 Series
Wire Wound through hole structure with Excellent impedance characteristics at high frequency , making it great for suppressing common mode noise.
CM6050 Series
Broadband frequency power line common mode choke withstand severe and harsh operating environments, with substantial normal mode noise suppression capability.
CM8663 Series
Wire Wound Through Hole structure allow extra high rated current and stable performance. Low DCR and Excellent impedance vs frequency features.
CMA0805
Laird™ CMA0805 series automotive common mode chokes are low profile and compact design which improve performance and reliability, and reduce total EMC cost.
CMX1211 Series
High current rating up to 50A, stable performance and high Suppression of asymmetric interference at both low and high frequency.
CMX1616 Series
High current rating up to 62A, stable performance and high Suppression of asymmetric interference at both low and high frequency.