Sophisticated Solid-State Decoupling


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Product Description

Building on Dairyland’s proven history of industry-leading product lines, the PCRX represents the next technological leap forward in decoupling technology. Using sophisticated design techniques that represent the work of numerous leading experts around the world, the PCRX’s new camouflage technology renders it virtually invisible to interrupted survey testing.

Like our other decouplers, the PCRX is a solid-state, maintenance-free device designed to simultaneously provide DC decoupling and AC continuity/grounding when used with cathodically protected structures. Commonly used to decouple electric equipment from grounding systems, for AC mitigation projects, or other isolation and grounding applications, the PCRX is the most sophisticated decoupler in the world.

AC Fault Current (AMPERES-RMS) 50/60Hz
5.0kA at 30 cycles
10kA at 30 cycles
15kA at 30 cycles

Review the Technical Literature for full fault current tables.

NEMA 4X (standard)
Ambient Temperature Range:
-40C to +50C (-40 to +122F)
Threshold Voltage
100kA crest (8 x 20 µs waveform)
ANSI/ISA: Class I, Division 2, Groups A, B, C, D
ATEX: Zone 2, Group IIC
IECEx: Zone 2, Group IIC
UKEx: Zone 2, Group IIC


The PCRX has been tested by Nationally Recognized Testing Laboratories (NRTLs) for compliance to independent standards in its operation, ratings, and construction. This includes compliance to standards for:

Class I, Div. 2, Groups A, B, C, D and Zone 2, Group IIC.

Class & Division System: UL (United States) and C-UL (Canada)

  • Effective Ground Fault Current Path per:
    • NFPA 70 (US National Electric Code – NEC): Article 250.4(A)(5)
    • CSA C22.1 (Canadian Electric Code, Part I): 10-100 & 10-500
  • Isolation of Objectionable DC Ground Currents per:
    • NFPA 70: Article 250.6(E) CSA C22.1: 10-100 & 10-500
  • Hazardous Location Use: Class 1, Division 2, Groups A, B,C,D by UL & C-UL per:
    • UL 121201, 9th Ed. and CSA C22.2 No.213-17
  • Safety Requirements for Electrical Equipment per:
    • UL 61010-1, 3rd Ed. & CSA C22.2 No. 61010-1
    • Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
    • Enclosure Rating: NEMA 4X • Temperature Range: -40°C to +50°C (-40°F to +122°F)
    • Max Altitude: 2000 meters
    • Ambient Pressure of 80 kPa (0.8 bar) to 110 kPa (1.1 bar)
    • Relative Humidity: 0-100% noncondensing
    • Outdoor use
    • Pollution Degree 2

Zone System: ATEX / IECEx / UKEx (Europe / International / UK). ATEX per directive 2014/34/EU (Equipment for use in Potentially Explosive Atmospheres):

  • Zone 2, Group IIC, Increased Safety “ec”
  • EN IEC 60079-0: 2018
  • EN IEC 60079-7: 2015+A1:2018
  • IEC 60079-0: 2017
  • IEC 60079-7: 2017
  • Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
  • Temperature Range: -40°C to +50°C
  • Enclosure Rating: IP66

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