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Product Description

The SSD uses proven, solid-state construction combined with innovative production and packaging techniques, to offer exceptional performance while lowering the cost of applying protection products to the industry. With a range of ratings for AC fault current and lightning, and the ability to pass steady-state AC current, the device outperforms other technologies such as metal oxide varistors, gapped arresters, and polarization cells. Now proven over many years, the SSD is the most commonly used Dairyland decoupler in the world providing effective DC decoupling and AC continuity/grounding to end-users around the world.

UL Canada & United States
Certification Image
AC Fault Current (Amperes-RMS) 50/60Hz
1.2kA at 30 cycles
2.0kA at 30 cycles
3.7kA at 30 cycles
5.0kA at 30 cycles

Review the Technical Literature for full fault current tables.

AC Steady-State Current
45A (standard)
(amperes - rms) 50/60Hz
Environmental Rating
IP68 - submersible (to 2m depth)
Threshold Voltage
-2/+2V (standard)
-3/+1V (optional)
Lightning Impulse Current
100kA crest (8 x 20 µs waveform) (standard)

Class N 50kA crest* (10 x 350 µs waveform)
*optional unless required by international standards

Class N (ISG class N withstand lightning current per IEC 62561-3:2017)

Hazardous (Classified) Areas
ANSI/ISA: Class I, Division 2, Groups A, B, C, D
ATEX: Zone 2, Group IIC
IECEx: Zone 2, Group IIC
EAC: Zone 2, Group IIC
UKEx: Zone 2, Group IIC

The SSD 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 and CSA C22.2 No.213-17
  • Safety Requirements for Electrical Equipment per:
    • UL 61010-1, 3rd & CSA C22.2 No. 61010-1
    • Overvoltage Protection from Impulse (Lightning) Current: 100kA (8 x 20µs)
    • Enclosure Rating: IP68 (Submersible to 2 meters depth)
    • Temperature Range: -45°C to +65°C  (-49°F to +149°F)

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: -45°C to +65°C
  • Enclosure Rating: IP68

EAC: Russia, Kazakhstan, etc. by KAZEXPOAUDIT

  • Zone 2, Gas Group IIC, Increased Safety “e”
  • GOST 31610.0-2019 (EN IEC 60079-0:2018)
  • GOST IEC 60079-7:2015+A1:2018
  • Temperature Range: -45°C to +65°C

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