To meet the fundamental requirements of performance, longer service life and greater safety under real world conditions, ERICO has developed Transient Discriminating (TD) technology. This quantum leap in technology adds a level of “intelligence to the Surge Protection Device enabling it to discriminate between sustained abnormal over-voltage conditions and true transient or surge events. Not only does this ensure safe operation under practical application, but it also prolongs the life of the protector since permanent disconnects are not required as a means of achieving internal over-voltage protection.

The Core of TD technology:The secret to ERICOs Transient Discriminating Technology is its active frequency discrimination circuit. This patented device can discriminate between a temporary over-voltage (TOV) condition and a very fast transient, which is associated with lightning or switching-induced surges. When the transient frequencies are detected, the patented QuickSwitchTM within TD activates to allow the robust protection to limit the incoming transient. The frequency discriminating circuit that controls the Quick-SwitchTM ensures that the SPD device is immune to the effects of a sustained 50 or 60Hz TOV. This allows the device to keep operating, providing safe and reliable transient protection, even after an abnormal over-voltage condition has occurred.


  • 20 kA 8/20 μs surge rating provides robust surge protection.
  • Three modes of protection: L-N, L-PE and N-PE.
  • Indication flags and voltage-free contacts provide remote status monitoring.
  • Separate plug and base design facilitates replacement of a failed surge module.



Part Number TDS1301TR240
Article Number 702422
Nominal System Voltage (Un) 220 – 240 VAC
Max Continuous Operating Voltage (Uc) 275 VAC
Stand-off Voltage 440 VAC
Voltage Protection Rating (VPR) 1,500.0 V @ 3 kA L-N
800.0 V @ 3 kA L+N-PE
Nominal Discharge Current (In), Per Mode 8 kA 8/20 μs
Max Discharge Current (Imax) 20 kA 8/20 μs L-N
20 kA 8/20 μs L-PE
Back-Up Overcurrent Protection 63 A
Short Circuit Current Rating (SCCR) 200 kA
Frequency 0 – 100 Hz
Protection Modes L-N
Response Time 5 ns Max
Technology TD technology with thermal disconnect
Connection, PE Solid 35 mm² Max
Connection, PE Stranded 25 mm² Max
Connection, Solid 6 mm² Max
Connection, Stranded 6 mm² 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 80 °C
Module Width 1 M
Depth (D) 68 mm
Height (H) 90 mm
Width (W) 18 mm
Unit Weight 0.12 kg
Certification Details UL® 1449 Edition 3 Type 2, 3 kA Mode
Complies With ANSI®/IEEE® C62.41.2-2002 Cat A, Cat B
IEC® 61643-1 Class III
Replacement Module TDS130M240
Certifications cURus
Standard Packaging Quantity 1 pc
UPC 78285662174
EAN-13 8711893097122

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