TDX100M277TT 100 kA



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  • Transient Discriminating (TD) Technology provides increased service life
  • Modular design allows easy replacement of surge modules
  • Built-in 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
  • Status indication flag per mode, voltage presence LEDs, audible alarm and voltage-free contacts providing remote status monitoring
  • 100 kA 8/20 μs maximum surge rating provides protection suitable for main-distribution panels and an extended operational life


Part Number TDX100M277/480TT
Nominal System Voltage (Un) 277/480 V
Distribution System 3Ph 4W+G {suitable for TT system)
Max Continuous Operating Voltage (Uc) 320/550 VAC
Stand-off Voltage 480/831 VAC
Frequency 50 – 60 Hz
Protection Modes L-N
Short Circuit Current Rating (SCCR) 200 kA
Nominal Discharge Current (In), IEC 40 kA 8/20 μs
Nominal Discharge Current (In), UL 20 kA 8/20 μs
Max Discharge Current (Imax), Per Phase 100 kA 8/20 μs
Impulse Current (Iimp), Per Mode 12.5 kA 10/350 μs
25.0 kA 10/350 μs N-PE
Voltage Protection Rating (VPR), L-N 1,200 V @ 3 kA
1,800 V @ 20 kA
Status Indication LED
Mechanical flag
Audible alarm
Surge Counter No
Technology TD technology with thermal disconnect
Over-current replaceable cartridge fusing
EMI/RFI filter
Remote Contacts Yes
Lead Length 762 mm
Lead Size 5.26 mm²
Ground Lead Length 914 mm
Temperature -40 to 80 °C
Enclosure Material Metal
Enclosure Rating IP 65
Mounting 3/4” straight nipple
Depth (D) 78 mm
Height (H) 240 mm
Width (W) 84 mm
Unit Weight 1.41 kg
Certification Details UL® 1449 Edition 4 Type 1/2, 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 3, 100 kA 8/20 μs, 10 kA 10/350 μs
IEC® 61643-1 Class I, Class II
Replacement Module TDS150M277
Certifications CE, ERICO TDX
Standard Packaging Quantity 1 pc
UPC 78285659382
EAN-13 8711893097030



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