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Transient Discriminating MOVTEC


  • Transient Discriminating (TD) Technology provides increased service life
  • Built-in features include TD Technology, thermal protection and short circuit current fusing
  • LED status indication and voltage-free contacts provide remote status monitoring
  • 100 kA 8/20 μs maximum surge rating provides protection suitable for smaller main-distribution panels and an extended operational life


Part Number TDSMT120 TDSMT277 TDSMT480
Nominal System Voltage (Un) 110 - 120 V 230 - 277 V 480 V
Nominal Discharge Current (In), Per Mode 80 kA 8/20 μs
Max Continuous Operating Voltage (Uc) 170 VAC 400 VAC
Stand-off Voltage 240 V 480 V
Frequency 50 – 60 Hz
Connection, Stranded #6 Max
Impulse Current (Iimp) 20 kA 10/350 μs
Max Discharge Current (Imax)
Max Discharge Current (Imax), Per Mode 100 kA 8/20 μs
Voltage Protection Level (Up)
Voltage Protection Rating (VPR) 400.0 V @ 3 kA
760.0 V @ 20 kA
700.0 V @ 3 kA
980.0 V @ 20 kA
1,050.0 V @ 3 kA
1,300.0 V @ 20 kA
Aggregate Surge Rating 200 kA 8/20 μs
Back-Up Overcurrent Protection 100 A
Max Operating Current 25 mA
Protection Modes Single
Status Indication 5 segment LED bar graph per phase
Technology TD technology with thermal disconnect
Temperature -31 to 131 °F
Enclosure Material UL® 94V-0 Thermoplastic
Enclosure Rating IP 20
Depth (D) 5.51"
Height (H) 5.91"
Width (W) 1.77"
Unit Weight 1.32 lb
Certification Details UL® 1449 Edition 3 Recognized Component Type 2
Complies With ANSI®/IEEE® C62.41.2-2002 Cat A, Cat B, Cat C
ANSI®/IEEE® C62.41.2-2002 Scenario II, Exposure 3, 100 kA 8/20 μs, 10 kA 10/350 μs

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ANSI is a registered trademark of American National Standards Institute.
IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
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UL, UR, cUL, cUR, cULus and cURus are registered certification marks of UL LLC.


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




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