Polarization Cell Replacement Decoupling Device (DCD)

Product

The Cathtect USA DCD is a solid-state polarization cell replacement engineered for the most demanding cathodic protection and AC mitigation environments.  Designed to isolate DC while providing a continuous, low-impedance path for AC fault, lightning, and steady-state currents, the DCD delivers the highest level of performance in Cathtect’s decoupler family.  Its advanced multi-stage filtering architecture provides sharper attenuation of unwanted frequencies, reduced harmonic interference, and more stable system behavior under fluctuating AC conditions.  Built for critical infrastructure, high-risk environments, and regulatory-driven installations, the DCD offers a maintenance-free alternative to electrochemical polarization cells – delivering superior AC mitigation, cleaner signal paths, and reliable DC isolation across the full operating range.  As the modern standard in decoupling, the DCD redefines what a polarization cell replacement can be.  While legacy solid-state decouplers rely on basic filtering and older design philosophies, the DCD introduces lower RMS voltage drop, enhanced filtering precision, and more consistent mitigation stability.  It is the modern alternative for operators who expect more from their decoupling systems – more precision, more transparency, and more performance.

Product Highlights

• High-performance AC mitigation with ultra-low impedance
• Advanced multi-stage filtering for cleaner signals and reduced harmonic interference
• Consistently lower RMS voltage drop (50–80% lower than competing devices)
• High-energy surge handling with 100 kA (10/350 µs) direct-strike capability
• Defined DC clamping thresholds for precise system design
• Stable performance under fluctuating AC loads
• Maintenance-free solid-state construction
• Available in Ex e hazardous-rated and NEMA 6/6P non-hazardous enclosures
• Unit-level QA documentation including batch test results and threshold verification

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