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Transient Discriminating Surge Diverter, 50 kA TT System


  • TD Technology with thermal disconnect protection
  • Compact design fits into DIN distribution panel boards and motor control centers
  • 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


Part Number TDS350TT150 TDS350TT277 TDS350TT560
Nominal System Voltage (Un) 120 - 150 VAC 240 - 277 VAC 480 - 560 VAC
Max Continuous Operating Voltage (Uc) 170/295 VAC 320/536 VAC 610/1055 VAC
Stand-off Voltage 240/415 VAC 480/813 VAC 790/1370 VAC
Voltage Protection Rating (VPR) 600.0 V @ 3 kA
1,000.0 V @ 25 kA
1,000.0 V @ 3 kA
1,600.0 V @ 20 kA
1,800.0 V @ 3 kA
2,400.0 V @ 20 kA
Nominal Discharge Current (In) 25 kA 8/20 μs 20 kA 8/20 μs
Max Discharge Current (Imax) 50.0 kA 8/20 μs
12.5 kA 10/350 μs N-PE
Back-Up Overcurrent Protection 125 A
Short Circuit Current Rating (SCCR) 200 kA
Frequency 0 – 100 Hz
Protection Modes L-L
Response Time 5 ns Max
Technology TD technology with thermal disconnect
Connection, Solid #2 Max
Connection, Stranded #4 Max
Mounting 35 mm top hat DIN rail
Enclosure Material UL® 94V-0 Thermoplastic
Enclosure Rating IP 20
Remote Contacts Yes
Status Indication Mechanical flag
Temperature -40 to 176 °F
Module Width 4 M
Depth (D) 2.68"
Height (H) 3.54"
Width (W) 2.76"
Unit Weight 1.1 lb
Certification Details UL® 1449 Edition 4 Type 4CA, 20 kA Mode
Complies With ANSI®/IEEE® C62.41.2-2002 Cat A, Cat B, Cat C
ANSI®/IEEE® C62.41.2-2002 Scenario II, Exposure 2, 50 kA 8/20 μs
IEC® 61643-1 Class II
Replacement Module TDS150M150

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IEC is a registered trademark of the International Electrotechnical Commission.
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NEMA is a registered service mark of National Electrical Manufacturers Association.
UL, UR, cUL, cUR, cULus and cURus are registered certification marks of UL LLC.


0.99 MB English
Wind Power Solutions
1.94 MB English



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

Instruction Sheets

TDS Series
1.15 MB English



3D Models