Würth Elektronik High-Voltage Common Mode Chokes
Würth Elektronik High Voltage Common Mode Chokes combine the WE-CMA HV and WE-CMB HV to help engineers reduce conducted EMI in demanding automotive and power-electronics designs. These chokes provide a practical filtering solution for systems that must manage high voltages, switching noise, insulation demands, and EMC compliance pressure. The devices include high-permeability MnZn core material and enhanced insulation structure with plastic case and winding spacer, enabling robust common-mode filtering in compact high-voltage systems. The WE-CMA HV chokes are designed for automotive high-voltage systems, including DC/DC converters, onboard chargers, motor inverters, and automotive power filters. The WE-CMBHV chokes are designed for power-line and general-power-electronics filtering, including input/output filters, motor interference suppression, and common-mode noise filtering in high-voltage AC applications.
Features
- WE-CMB HV:
- Designed for power line and power electronics EMI filtering
- Supports applications up to 760VAC
- Up to 22A rated current
- Up to 38dB attenuation
- 5kHz to 5MHz suppression frequency range
- High-permeability MnZn core material
- Enhanced insulation structure using a plastic case and winding spacer
- ≥7mm air and creepage distances
- Designed according to EN 60938-2
- Insulation materials with UL 94 V-0 flammability rating
- -40°C to 125°C operating temperature range
- Available in two sizes (XL and XXL)
- WE-CMA HV:
- Designed for automotive high-voltage applications
- Supports applications up to 1000VAC/1250VDC
- Up to 22A rated current
- High-permeability MnZn core material for effective common-mode noise suppression
- Enhanced insulation structure using a plastic case and winding spacer
- -40°C to 125°C operating temperature range
- Available in two sizes (XL and XXL)
Applications
- DC/DC converters for hybrid and electric vehicles
- Onboard chargers
- Motor inverters
- Automotive power filters
- Power line input and output filters
- Radio interference suppression in motors
- Industrial and high-voltage power electronics systems
Related Products
Würth Elektronik WE-CMB Common Mode Power Line Inductors (Chokes)
Compact design delivers high suppression of asymmetric interferences, even at low frequency ranges.
Additional Resource
| Part Number | Datasheet | Maximum DC Current | Inductance | Maximum DC Resistance | Core Material | Length | Width |
|---|---|---|---|---|---|---|---|
| 784830007215 |  |
21.5 A | 700 uH | 3.8 mOhms | Zinc | 42.5 mm | 23 mm |
| 784830010185 | |
18.5 A | 1 mH | 5.5 mOhms | Zinc | 41.5 mm | 23 mm |
| 784830017132 | |
13.2 A | 1.7 mH | 10 mOhms | Zinc | 40 mm | 23 mm |
| 784830025103 | |
10.3 A | 2.5 mH | 18 mOhms | Zinc | 39.5 mm | 23 mm |
| 784831010205 | |
20.5 A | 1 mH | 5.5 mOhms | Zinc | 46.5 mm | 28 mm |
| 784831016164 | |
16.4 A | 1.6 mH | 8.5 mOhms | Zinc | 46.5 mm | 28 mm |
| 784831020133 | |
13.3 A | 2 mH | 13 mOhms | Zinc | 45.5 mm | 28 mm |
| 784831034090 | |
21.5 A | 3.4 mH | 3.8 mOhms | Zinc | 44.5 mm | 28 mm |