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Transient Discriminating Surge Diverters

Surges and voltage transients are a major cause of expensive electronic equipment failure and business disruption. Damage may result in the loss of capital outlays, such as computers and communications equipment, as well as consequential loss of revenue and profits due to unscheduled system down-time. nVent ERICO offers multiple series of surge suppressors that provide economical and reliable protection from voltage transients on power distribution systems. Transient Discriminating (TD) technology helps ensure reliable and continued operation during sustained and abnormal over-voltage events. Internal thermal disconnect devices help ensure safe behavior at end-of-life. A visual indicator flag provides user-feedback in the event of such operation.


  • TD Technology with thermal disconnect protection
  • CE, UL® 1449 Edition 4 Listed
  • Available in various operating voltages to suit most common power distribution systems

nVent, nVent CADDY, nVent ERICO, nVent ERIFLEX, and nVent LENTON are owned by nVent or its global affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without prior notice.

UL, UR, cUL, cUR, cULus and cURus are registered certification marks of UL LLC.


0.99 MB English
823 KB English
Wind Power Solutions
1.94 MB English



cUR FOKY8.E325047
CSA C22.2 No. 8
cUR VZCA8.E325047
CSA C22.2 No. 8, CSA Electrical Notice No. 516
444 KB Français
UR FOKY2.E325047
ANSI/UL 1283
UR VZCA2.E325047
ANSI/UL 1449


TDXM Modular Series
86 KB English
TDXM Modular Series
86 KB English

Instruction Sheets

TDS Series
1.15 MB English
Transient Surge Filter
1.42 MB English