TDX SPD Compact Series Surge Protection


TDX SPD Compact Series Surge Protection

The TDX Compact Series of Surge Protection Devices are designed for critical protection applications. The 50kA to 200kA (depending on model) of surge protection meets the IEEE®C62.41.2 Scenario II single shot surge rating requirements for exposed service entrance locations – Exposure 3.

The NEMA®-4 weather tight housing allows the TDX to be installed on indoor or outdoor service panels. The preconfigured connecting leads simplify installation. The unique narrow construction allows the SPD to fit between adjacent panel boards. A flush mounting kit is also available for installing the SPD in drywall applications.

Listed as a Type 1 SPD to UL®1449 3rd Edition, the TDX Compact Series can be installed within a Type 1 or 2 location in accordance with the NEC®2008.


  • Transient Discriminating (TD) Technology provides increased service life
  • Built-in safety features include TD Technology, thermal protection and short circuit current fusing
  • Compact NEMA-4 enclosure design can be flush mounted or installed in a small space
  • LED status indication and voltage-free contacts provide remote status monitoring
  • 50kA 8/20µs, 100kA 8/20µs or  200kA 8/20µs (depending on model) maximum surge rating provides protection suitable for smaller main distribution panels and an extended operational life
  • Available in various operating voltages to suit most common power distribution systems
  • CE, UL® 1449 Edition 3 Listed
  • ERICO Surge Products are covered by an extended warranty; see the attached document for more information


  • Designed for equipment panel and motor protection applications
  • Ideal for retrofit to indoor or outdoor branch panels or distribution boards

            Compact size fits narrow installations.

More Information

Part Number
TDX50C120 50kA/Phase, 120V, 1Ph, 2W+G
TDX50C120/208 50kA/Phase, 120/208V, 3Ph, 4W+G
TDX50C120/240 50kA/Phase, 120/240V, 1Ph, 3W+G
TDX50C120/240D 50kA/Phase, 120/240V, 3Ph DELTA, 4W+G*
TDX50C240 50kA/Phase, 240V, 1Ph, 2W+G*
TDX50C277/480 50kA/Phase, 277/480V, 3Ph, 4W+G
TDX50C347/600 50kA/Phase, 347/600V, 3Ph, 4W+G


Part Number
TDX100C120 100kA/Phase, 120V, 1Ph, 2W+G
TDX100C120/208 100kA/Phase, 120/208V, 3Ph, 4W+G
TDX100C120/240 100kA/Phase, 120/240V, 1Ph, 3W+G
TDX100C240 100kA/Phase, 240V, 1Ph, 2W+G*
TDX100C277/480 100kA/Phase, 277/480V, 3Ph, 4W+G
TDX100C347/600 100kA/Phase, 347/600V, 3Ph, 4W+G*
TDX200C120/208 200kA/Phase, 120/208V, 3Ph, 4W+G
TDX200C120/240 200kA/Phase, 120/240V, 1Ph, 3W+G
TDX200C277/480 200kA/Phase, 277/480V, 3Ph, 4W+G
IEC 61643-1
UL® 1449 Ed 3 Listed Type 1/2*Product listed to UL1449 Ed 3 through Intertek (ETL).
ANSI is a registered trademark of the American National Standards Institute. cULus is a registered certification mark of UL LLC. ETL is a registered trademark of Intertek Testing Services NA, Inc. IEEE is a registered trademark of the Institute of Electrical and Electronics Engineers, Incorporated. NEC is a registered trademark of, and National Electric Code (NEC) standard is a copyright of the National Fire Protection Association, Inc. NEMA is a registered service mark of the National Electrical Manufacturers Association. UL is a registered trademark of UL LLC.


Coordinated Facility Protection Catalog

Surge 10 Year Warranty