TDS350 – TDS Surge Diverter


TDS350 - TDS Surge Diverter

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.

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. As standard, the TDS surge diverter provides a set of voltage-free contacts for remote signaling that maintenance is due.

The convenient plug-in module and separate base design facilitates replacement of a failed surge module without needing to undo installation wiring.


  • TD Technology with thermal disconnect protection
  • Compact design fits into DIN distribution panel boards and motor control centers
  • 35 mm DIN rail mount – DIN 43 880 profile matches common circuit breakers
  • Indication flags and voltage-free contacts provide remote status monitoring
  • Separate plug and base design facilitates replacement of a failed surge module
  • 50kA 8/20µs maximum surge rating provides protection suitable for sub-distribution panels and a long operational life
  • Available in various operating voltages to suit most common power distribution systems
  • ERICO Surge Products are covered by an extended warranty; see the attached document for more information
  • CE, UL® 1449 Edition 3 Listed
  • USA Approval
  • Canadian Approval


The TDS series of surge suppressors provides economical protection to sub-distribution panel boards and control cabinets in locations classified for devices tested to IEC61643-1 test class II (or VDE classification C).

More Information

Part No. Part No. for Europe Description
TDS350TNC150 702414 Uc 170/295V, In 25kA, Imax 50kA 8/20µs, Remote
TDS350TNC277 702417 Uc 320/536V, In 20kA, Imax 50kA 8/20µs, Remote
TDS350TT150 702416 Uc 170/295V, In 25kA, 50kA 8/20µs, 12.5kA 10/350µs N-PE, Remote
TDS350TT277 702418 Uc 320/536V, In 20kA, 50kA 8/20µs, 12.5kA 10/350µs N-PE, Remote
TDS50120/240 702419 Uc 240/480V, In 25kA, Imax 50kA 8/20µs, Remote

IEC 61643-1
UL® 1449 Ed 3 Recognized Component Type 2

Surge Rated to Meet:
ANSI®/IEEE® C62.41.2 Cat A, Cat B, Cat C
ANSI®/IEEE® C62.41.2 Scenario II, Exposure 2, 50kA 8/20µs
IEC 61643-1 Class II
UL® 1449 Ed3 In 20kA mode

ANSI is a registered trademark of the American National Standards Institute. cULus is a registered certification mark of UL LLC.  IEEE is a registered trademark of the Institute of Electrical and Electronics Engineers, Incorporated. NEMA is a registered trademark of the National Electrical Manufacturers Association. UL is a registered trademark of UL LLC.


TDS data sheet

Surge 5 Year Warranty