Surges and voltage transients are a major cause of equipment failure and system disruption. The TDS50 series surge protective devices, part of the ERITECH line of facility electrical protection products from ERICO, are designed to provide economical and reliable protection from voltage transients on solar PV systems.

They are conveniently packaged for easy installation on 35 mm DIN rail. Internal thermal disconnect devices help ensure safe behavior at end-of-life. A visual indicator flag provides user feedback in the event of such operation. As standard, the TDS50 provides a set of voltage-free contacts for remote signaling that maintenance is required. The convenient plug-in module and separate base design facilitates replacement of a failed surge module without needing to undo installation wiring.


Part Number TDS503BR1000DC
Nominal System Voltage (Un) 1,000 VDC
Max Continuous Operating Voltage (Uc) 1,000 VDC
Voltage Protection Rating (VPR) 4,000.0 V @ 3 kA – to PE
4,000.0 V @ 3 kA + to PE
Nominal Discharge Current (In) 20 kA 8/20 μs
Max Discharge Current (Imax) 50 kA 8/20 μs
Frequency 0 – 100 Hz
Protection Modes -ve to PE
+ve to PE
Technology Gas Discharge Tube (GDT)
Metal Oxide Varistor (MOV)
Connection, Solid 35 mm² Max
Connection, Stranded 25 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 3 M
Depth (D) 68 mm
Height (H) 90 mm
Width (W) 53 mm
Unit Weight 0.36 kg
Certification Details UL® 1449 Edition 3 for PV Applications
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
Replacement Module TDS150M277
Certifications cURus
Standard Packaging Quantity 1 pc
UPC 78285666498
EAN-13 8711893066340