EMCL Coupling Clamps / ABCL Decoupling Clamps

Schlöder GmbH

Schlöder EMCL coupling clamps and ABCL decoupling clamps are essential accessories for conducted RF immunity testing per IEC 61000-4-6, enabling clamp injection without direct cable connection. The EMCL clamps couple RF disturbance onto cables up to 20 mm (EMCL-20) or 35 mm (EMCL-35) diameter, while the ABCL clamps decouple auxiliary equipment from the test signal. Compact, robust, and easy to integrate into any CDG 7000 or CDN-based test setup.

Key Features

  • For IEC 61000-4-6 conducted immunity testing
  • EMCL: EM coupling clamp, cable diameter up to 20 mm or 35 mm
  • ABCL: decoupling clamp, cable diameter up to 20 mm or 35 mm
  • Low insertion loss: 10 V test level achievable with approx. 15 W RF amplifier power
  • Supplied with calibration set and individual calibration data
  • Simple clamp-on design, no cable modification needed
  • Frequency range extendable to 10 kHz with EMCL-NW_10 matching network
  • Compatible with CDG 7000 series and other Schlöder CDNs

Typical Applications

  • CE/EMC compliance testing
  • Testing cables/harnesses too large for standard CDNs
  • Auxiliary equipment decoupling during immunity tests
  • Industrial & automotive cable immunity testing
Overview & Applications
BrandSchlöder GmbH
StandardsIEC 61000-4-6
Frequency Range100 kHz – 1000 MHz (extendable to 10 kHz with NW_10)
Max Cable Diameter35 mm
CalibrationSupplied with calibration set and traceable calibration data
ModelDescription
CDN ABCL-20Decoupling clamp for immunity, acc. IEC 61000-4-6, 100 kHz – 1000 MHz, cable diameter max. 20mm.
CDN ABCL-35Decoupling clamp for immunity, acc. IEC 61000-4-6, 100 kHz – 1000 MHz, cable diameter max. 35mm.
CDN EMCL-20EM clamp acc. to /EC/EN 61000-4-6 incl. calibration kit and factory calibration, traceable, cable diameter max. 20 mm
CDN EMCL-35EM clamp acc. to /EC/EN 61000-4-6 incl. calibration kit and factory calibration, traceable, cable diameter max. 35 mm
OptionDescription
CDN-EMCL-NW_10Matching network 10kHz – 150kHz, for using EMCL 20 and BCI-P1 from 10kHz to 150kHz/1 MHz
KAL SET EMCLCalibration set for EMCL, acc. IEC 61000-4-6

Schlöder EMCL EM coupling clamps and ABCL decoupling clamps provide a practical solution for conducted RF immunity testing on cables and harnesses where a direct CDN connection is not possible. Compliant with IEC 61000-4-6, the EMCL clamps couple the RF disturbance signal onto cables without requiring any modification to the cable or its connectors — the clamp simply closes around the cable bundle. Two cable diameter versions are available for each clamp type: up to 20 mm (EMCL-20 / CDN ABCL-20) and up to 35 mm (EMCL-35 / CDN ABCL-35). The low insertion loss of the EMCL design means the standard 10 V test level can be achieved with approximately 15 W of RF amplifier power. Each unit is supplied with a calibration set and individual calibration data traceable to national standards. For applications requiring coverage below 100 kHz, the optional EMCL-NW_10 matching network extends the frequency range down to 10 kHz, allowing use with the BCI-P1 probe for combined low- and high-frequency conducted immunity testing.

Clamp-on RF coupling

Couple RF disturbances onto cables up to 35 mm diameter without any cable modification.

Low insertion loss

10 V test level achievable with only ~15 W amplifier power — efficient and cost-effective.

Traceable calibration

Supplied with calibration set and individual calibration data traceable to national standards.

Extendable to 10 kHz

Optional EMCL-NW_10 matching network extends frequency coverage down to 10 kHz.

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