Solid State Decoupling device (SSD)
Solid State Decoupling device (SSD) - Image 2
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Solid State Decoupling device (SSD)

 

Compact hazardous-area decoupling with advanced AC filtering for modern CP systems.

The Cathtect USA SSD is a compact, hazardous-rated solid-state decoupler engineered to provide safe DC isolation while allowing AC fault, lightning, and steady-state currents to pass to ground.  Built for installations where space, cost, and hazardous-area compliance matter, it delivers the same advanced filtering architecture found across Cathtect’s decoupler family – ensuring low impedance, stable AC mitigation, and predictable performance under fluctuating conditions.  Its Ex e-rated enclosure, maintenance-free construction, and streamlined footprint make it ideal for insulating joints, grounding interfaces, and AC mitigation points in hazardous environments.  As a modern alternative to legacy decouplers that haven’t evolved with today’s AC interference challenges, our hazardous SSD brings advanced filtering and solid-state reliability to a compact, cost-effective form factor designed for real-world CP systems.

 

Product Highlights

  • Safe DC isolation with AC fault and lightning diversion
  • Advanced AC filtering for lower RMS voltage drop and stable mitigation
  • Low AC impedance (~3 mΩ typical, 0.04 Ω guaranteed) with unit-level QA
  • Robust current handling including 45 A continuous and 60 A for 15 minutes
  • Direct-strike surge capability (100 kA, 10/350 µs)
  • Defined DC clamping ranges for precise system design
  • Compact, hazardous-rated Ex e enclosure
  • Maintenance-free solid-state architecture
  • Field-ready documentation including batch test results and QA verification

*Please use the Filter option below to narrow specifications, or browse the table list of standard SSD decoupler units we offer.

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Description

Overview

Cathtect USA’s hazardous SSD is chosen by operators who want flagship-level filtering in a compact, hazardous-rated design.

The SSD represents Cathtect’s focused, modern approach to decoupling: a compact, hazardous-rated solution that delivers advanced filtering and dependable AC mitigation without the size or cost of a full DCD unit.  Its solid-state architecture provides DC isolation during normal operation and instantly conducts during AC faults or lightning events, ensuring a safe, low-impedance path to ground.

The SSD’s filtering design reduces RMS voltage drop across low, medium, and high AC currents—helping lower AC corrosion risk, improve pipeline safety, and stabilize mitigation performance.  Defined DC clamping ranges simplify specification and ensure compatibility with standard CP system designs.

Every SSD is batch-tested and shipped with transparent performance documentation, reinforcing reliability and traceability in hazardous-area applications where space and cost efficiency are priorities.

*Please use the Filter option to narrow specifications, or browse the table list of standard SSD decoupler units we offer.

Specifications


Specifications:

Electrical Performance

  • AC fault current ratings (30 cycles): 1.2 kA, 3.7 kA, 5 kA, 7 kA, 10 kA
  • DC clamping voltage ranges: +2V, +1V, –2V, –3V, –4V, –6V
  • AC steady-state current: 45 A @ 50/60 Hz
  • Low AC impedance: ~3 mΩ typical, 0.04 Ω guaranteed
  • Lightning impulse rating: 100 kA (10/350 µs)
  • High steady-state DC current drain

Mechanical & Environmental

  • Ex e enclosure suitable for Hazardous Areas Zone 1 & 2
  • IP68 submersible design (up to 2 meters)
  • Terminal polarity clearly marked
  • Unlimited switching cycles
  • Weight: 5.8 lbs (3.7 kA, +1/–3V model)

Video


Video:

To order, please request a quote using the add to quote button above or get in touch with us directly using our contact form or giving us a call. 

Option AC Fault Amp DC Threshold Voltage
SSD 1.2kA, +2,-2V
 1.2kA 45 +2,-2V
SSD 1.2kA, +1,-3V
 1.2kA 45 +1,-3V
SSD 1.2kA, +1,-4V
 1.2kA 45 +1,-4V
SSD 1.2kA, +1,-6V
 1.2kA 45 +1,-6V
SSD 2kA, +2, -2V 2kA 45 +2,-2V
SSD 2kA, +1,-3V 2kA 45 +1,-3V
SSD 2kA, +1,-4V 2kA 45 +1,-4V
SSD 2kA, +1,-6V 2kA 45 +1,-6V
SSD 3.7kA, +2,-2V 3.7kA 45 +2,-2V
SSD 3.7kA, +1,-3V 3.7kA 45 +1,-3V
SSD 3.7kA, +1,-4V 3.7kA 45 +1,-4V
SSD 3.7kA, +1,-6V 3.7kA 45 +1,-6V
SSD 5kA, +2,-2V 5kA 45 +2,-2V
SSD 5kA, +1, -3V 5kA 45 +1,-3V
SSD 5kA, +1,-4V 5kA 45 +1,-4V
SSD 5kA, +1,-6V 5kA 45 +1,-6V
SSD 7kA, +2,-2V 7kA 45 +2,-2V
SSD 7kA, +1, -3V 7kA 45 +1,-3V
SSD 7kA, +1,-4V 7kA 45 +1,-4V
SSD 7kA, +1,-6V 7kA 45 +1,-6V
SSD 10kA, +2,-2V 10kA 45 +2,-2V
SSD 10kA, +1, -3V 10kA 45 +1,-3V
SSD 10kA, +1,-4V 10kA 45 +1,-4V
SSD 10kA, +1,-6V 10kA 45 +1,-6V

 

 

Additional information

AC Fault Options

10kA @ 500 mSec. (30 Cycles), 7kA @ 500 mSec. (30 Cycles), 1.2kA @ 500 mSec. (30 Cycles), 2kA @ 500 mSec. (30 Cycles), 3.7kA @ 500 mSec. (30 Cycles), 5kA @ 500 mSec. (30 Cycles)
DC Threshold Options (SSD)

+1/-3, +1/-4, +1/-6, +2/-2
Enclosure Options

Standard IP 68 Exe, Other

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