Common Mode Power-Line Chokes

Wurth Electronics offers their WE-CMB, WE-CMBNC, WE-CMB HC, WE-CMBH, WE-CMB HV, WE-CMB NiZn, and WE-ExB series of common mode chokes

Image of Wurth Electronics' Common Mode Power Line ChokesWurth Electronics offers base nanocrystalline, high-current, base nickel-zinc, extreme bandwidth, horizontal, and high-voltage common mode power-line chokes. 

WE-CMB Series Common Mode Choke: The WE-CMB series achieves high suppression of asymmetric interferences, even at low frequency ranges. Do not underestimate the parasitic effects when using common mode chokes. This was the most important point to reduce these dues when developing the WE-CMB series. The perfect core / winding-ratio enables very-high currents at comparable areas, anyhow the inductance is sufficient. The adjusted wire gauge realizes low heating.

WE-CMBNC Series Common Mode Choke on Base Nanocrystalline: The WE-CMBNC product family is made with nanocrystalline cores and features broadband attenuation. Compared with the conventional cores made of MnZn core materials, nanocrystalline cores have 20 times more permeability. Mains-borne interference can, thus, be reduced down into the low kHz frequency range, where conventional NiZn and MnZn cores have very little attenuate effect. Even in high-frequency ranges, high levels of attenuation can be achieved due to the low winding capacitance. Compared with conventional cores, the Curie temperature is about three times higher, so push-pull interference cannot result in saturation of the mains choke.

WE-CMB HC Series Common Mode Choke High-Current: The WE-CMB HC series can also achieve high suppression of asymmetric interferences even at low frequency ranges. This series also features higher current ratings.

WE-CMB NiZn Series Common Mode Choke on Base Nickel-Zinc: The WE-CMB NiZn series has a core material of nickel-zinc and can achieve high suppression rates of asymmetric interferences at high and medium frequencies.

WE-ExB Series Common Mode Choke with Extreme Bandwidth: Wurth Electronics WE-ExB series offers double-core chokes made of MnZn and NiZn. Its insertion loss has a range of effect over a broader frequency range than does a single NiZn or MnZn core. Compared with previously available current-compensated line chokes, it offers a 70% greater insertion loss in the low frequency range (150 kHz to 4 MHz) and a 30% greater insertion loss in the high-frequency range (4 MHz to 30 MHz). This current-compensated common mode choke is particularly suited for network applications with a broad interference spectrum in EMC, network, or common-mode filters, especially in power electronics and motor interference suppression.

WE-CMBH Series Common Mode Choke Horizontal: Wurth Electronics offers a common mode power-line choke in a horizontal version. With a profile height of only 22 mm, the power-line choke is ideal for slim housings. Due to the low capacitance winding technology, suppression over a wide band is now possible. This makes the WE-CMBH series an excellent choice for interference suppression in the frequency range from 150 kHz to 30 MHz. This series can be used to filter common mode noise in AC/DC, as well as high-power DC/DC, power supplies. In addition, the CMBH series is equipped with a rugged mechanical stability due to no solder or glue connections of the core or leads to the plastic base. The available inductance values range from 1.0 mH to 7.0 mH, with current handling capabilities of up to 10 A.

WE-CMB HV Series Common Mode Choke High-Voltage: The WE-CMB HV series are current-compensated common mode chokes for mains applications up to 760 VAC. This series is pitch-compatible with the existing WE-CMB and WE-CMB NC series. Due to the plastic case and thicker separator, the WE-CMB HVs have up to three times the rated voltage, twice the insulation voltage, and up to three times greater clearance and creepage distances than the WE-CMB series.

WE-CMB Series: Common Mode Choke Characteristics Applications
  • Broadband screening because of low-capacitance winding technique
  • Very compact design
  • Highest possible current with small sizes
  • High interference compression asymmetric interference rates also at low-frequency range
  • Custom designs on request
  • Operating temperature: -40°C to 125°C
  • Power electronics
  • Power-line input and output filter
  • For filtering of devices without a stable ground connection
  • Radio interference suppression in motors
  • Suppression of common mode noise
WE-CMBNC Series: Common Mode Choke on Base Nanocrystalline Characteristics
Applications
  • Very-high permeability nanocrystalline core material
  • Improved isolation through plastic case and winding spacer
  • High and stable inductance values at high temperatures
  • High current rating
  • Broadband suppression
  • Small size
  • Frequency range: 1 kHz to 300 MHz
  • Operating temperature: -40°C to 125°C
  • Power electronics
  • Power-line input and output filter
  • Radio interference suppression in motors
  • Suppression for common mode noise
WE-CMB HC Series: Common Mode Choke High-Current Characteristics
Applications
  • Broadband screening because of low-capacitance winding technique
  • Very-compact design
  • Highest possible current with small sizes
  • Custom designs on request
  • Operating temperature: -40°C to 125°C
  • Power electronics
  • Power-line input and output filter
  • For filtering of devices without a stable ground connection
  • Radio interference suppression in motors
WE-CMB NiZn Series: Common Mode Choke on Base Nickel-Zinc Characteristics Applications
  • Compact size
  • High interference stability against RF interference and burst signals
  • Noise suppression up to 300 MHz
  • Operating temperature: -40°C to 125°C
  • Custom designs on request
  • Power electronics
  • Power-line input and output filter
  • Optimized for burst signals
WE-ExB Series: Common Mode Choke with Extreme Bandwidth Characteristics Applications
  • MnZn and NiZn core material
  • Suppression of noise in a broad frequency range (100 KHz to 100 MHz)
  • Combined noise and burst filter
  • Increases electromagnetic immunity 
  • Operating temperature range: -40°C up to 125°C
  • EMC filters
  • Mains line filters
  • Power electronics
  • Interference suppression in motors
  • Common mode filters
WE-CMBH Series: Common Mode Choke Horizontal Characteristics Applications
  • Horizontal design for compact housings
  • Suppression, even at low frequency
  • Broadband screening because of low-capacitance winding technique 
  • Highest possible current with small sizes
  • Customer-specific designs on request
  • Operating temperature: -40°C to 125°C
  • Power electronics
  • Power input and output filters
  • Radio interference suppression in motors
  • Suppression for common mode noise
WE-CMB HV Series: Common Mode Choke High-Voltage Characteristics Applications
  • Application up to 760 VAC
  • High permeability MnZn core material
  • Improved insulation through plastic case and winding spacer
  • Insulation materials UL 94 V-0 design according to EN 6093802
  • Air and creepage distances ≥ 7 mm
  • Same land pattern like the CMB series size XL and CMBNC series XXL
  • Up to 22 A rated current
  • Up to 38 dB attenuation
  • Suppression frequency range: 5 kHz to 5 MHz
  • Operating temperature: -40°C to 125°C
  • Power electronics
  • Power-line input and output filter
  • Radio interference suppression in motors
  • Suppression for common mode noise

WE-CMB Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
744821120 datasheet linkCMC 20MH 500MA 2LN TH744821120CMC 20MH 500MA 2LN TH20mH @ 10kHz500mA4012 - Immediate
744821120 product page link
744821110 datasheet linkCMC 10MH 700MA 2LN TH744821110CMC 10MH 700MA 2LN TH10mH @ 10kHz700mA2525 - Immediate
744821110 product page link
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WE-CMBNC Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
7448030509 datasheet linkCOMMON MODE CHOKE 9MH 5A 2LN TH7448030509COMMON MODE CHOKE 9MH 5A 2LN TH9mH @ 10kHz5A271 - Immediate
7448030509 product page link
7448010911 datasheet linkCMC 11MH 900MA 2LN TH7448010911CMC 11MH 900MA 2LN TH11mH @ 10kHz900mA369 - Immediate
7448010911 product page link
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WE-CMB HC Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
74482210002 datasheet linkCMC 175UH 10A 2LN TH74482210002CMC 175UH 10A 2LN TH175µH @ 100kHz10A388 - Immediate
74482210002 product page link
7448225007 datasheet linkCMC 700UH 5A 2LN TH7448225007CMC 700UH 5A 2LN TH700µH @ 100kHz5A661 - Immediate
7448225007 product page link
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WE-CMBH Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
744834101 datasheet linkCOMMON MODE CHOKE 1MH 10A 2LN TH744834101COMMON MODE CHOKE 1MH 10A 2LN TH1mH @ 10kHz10A184 - Immediate
744834101 product page link
744834405 datasheet linkCOMMON MODE CHOKE 5MH 4A 2LN TH744834405COMMON MODE CHOKE 5MH 4A 2LN TH5mH @ 10kHz4A204 - Immediate
744834405 product page link
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WE-CMBHV Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
744830007215 datasheet linkCMC 700UH 21.5A 2LN 3.8 MOHM744830007215CMC 700UH 21.5A 2LN 3.8 MOHM700µH @ 10kHz21.5A12 - Immediate
744830007215 product page link
744830010185 datasheet linkCMC 1MH 18.5A 2LN 5.5 MOHM744830010185CMC 1MH 18.5A 2LN 5.5 MOHM1mH @ 10kHz18.5A11 - Immediate
744830010185 product page link
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WE-CMB NiZn Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
744841247 datasheet linkCOMMON MODE CHOKE 47UH 2A 2LN TH744841247COMMON MODE CHOKE 47UH 2A 2LN TH47µH @ 10kHz2A861 - Immediate
744841247 product page link
744841414 datasheet linkCOMMON MODE CHOKE 14UH 4A 2LN TH744841414COMMON MODE CHOKE 14UH 4A 2LN TH14µH @ 10kHz4A583 - Immediate
744841414 product page link
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WE-ExB Series

ImageManufacturer Part NumberDescriptionInductance @ FrequencyCurrent Rating (Max)Available Quantity
744844102 datasheet linkCMC 1MH 4.5A 2LN TH744844102CMC 1MH 4.5A 2LN TH1mH @ 10kHz4.5A157 - Immediate
744844102 product page link
744844101 datasheet linkCMC 100UH 14A 2LN TH744844101CMC 100UH 14A 2LN TH100µH @ 10kHz14A127 - Immediate
744844101 product page link
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Published: 2016-11-14