TPS4C1125D2 voltage correction: Siemens identifies this TPS4-11 as an externally mounted Type 2 surge protective device for a 208Y/120-volt, three-phase four-wire system. It is not the 480-volt/20kA unit suggested by the inherited description.
TPS4C1125D2 specifications
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Catalog number: TPS4C1125D2
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System: 208Y/120VAC, 3-phase, 4-wire
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SPD category: Type 2, external enclosure
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Surge-current rating: 250kA
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Monitoring option: Dry-alarm contacts
SPD ratings are not interchangeable
Nominal discharge current, maximum surge-current capacity, voltage code, wiring mode, and enclosure type describe different characteristics. A “20kA” test-current value should not replace the catalog's 250kA surge-current rating in the product identity.
Engineering checkpoint
Match the nameplate to the exact service voltage, grounding scheme, available fault current, conductor length, upstream overcurrent protection, and alarm circuit. Surge equipment should be selected and installed by a qualified professional following the Siemens instructions.