EMI Noise Suppression
Inductors & Chokes
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AlfaMag offers many types of inductors and chokes for EMI noise suppression of ISDN S and U Interface, data and signal line filtering. Packages include compact and miniature SMD common mode chokes, octal common mode chokes for quad port E1 T1, SMD devices for 2,3,4,6 or 8 data lines. In addition, we offer both common mode and differential mode chokes for filtering AC lines.
Data Line Chokes
AlfaMag offers a wide range of inductors and chokes for EMI noise suppression of ISDN S and U Interface, data and signal line filtering, compact and miniature SMD common mode chokes, octal common mode chokes for quad port E1/T1, SMD devices for 2, 3, 4, 6 or 8 data lines.
- CCJ Series Common Mode Chokes
- CD and CQ Series Common Mode Interface Chokes for Data and Signal Lines
- CFJ Series Compact SMD Common Mode Chokes
- CMJ Series SMD Miniature Common Mode Chokes
- COJ Series CM Octal Chokes for Quad Port T1 E1
- CUJ Series Miniature Chip Style SMD Common Mode Filter Chokes
Common Mode Chokes
Alfamag has several common mode choke standard lines and can custom design a common mode choke to fit your requirements. Common mode chokes provide an efficient means of filtering supply lines having in-phase signals of equal amplitude, thus allowing equipment to meet stringent electrical radiation specifications. Differential mode signals can be attenuated substantially when used together with input and output capacitors.
Features
- Separated windings for minimum capacitance
- Meets requirements of EN138100, VDE 0565, part2: 1997-03 and UL1283
- Competitive pricing due to high volume production
- Fully RoHS compliant
- CA Series Common Mode Toroidal Chokes
- CFJ Series Compact SMD Common Mode Chokes
- CLJ-2 series Miniature SMD Common Mode Double Chokes
- CMJ Series SMD Miniature Common Mode Chokes
- CUJ Series Miniature Chip Style SMD Common Mode Filter Chokes
Contact our qualified experts today when you're ready to place an order, or dial 1-800-413-6693 to receive a detailed quote for your high frequency magnetic components.

