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nVent ERICO Protection Device​, F-Series


nVent ERICO is a world leader in grounding, bonding, surge and lightning protection in the railway industry, offering an extensive line of wayside surge protection. The EPD F-Series provides transient protection from surges induced or conducted onto low-voltage signal circuits for trackside signaling equipment. This series of surge-protection devices is ideal for microprocessor-based train-control and indication circuits, train inspection systems, communications systems, highway crossing controls and other operationally sensitive systems. Wayside rail-industry electronic-equipment environments are prone to dangerous and damaging voltage surges and transients. The EPD F-Series proven hybrid technology diverts surge currents to minimize the likelihood of system damage, reducing system down time and repair costs. nVent ERICO's design safeguards the devices against shorts, provides status indication at a glance and ensures uninterrupted signal operation when the device reaches end of life. Visual inspection is a key design feature. The device cover is color-coded and marked with the operating voltage and part number, which allows easy identification for proper application. nVent ERICO is committed to providing engineered high quality and technologically advanced solutions to the unique applications of the railway industry and has served the worldwide market for over 100 years. Railway systems around the world depend on nVent ERICO solutions to keep their systems running safely and efficiently.


  • Protects sensitive electronic equipment
  • Reduced operating and maintenance costs
  • Visual indicator
  • Open-circuit end-of-life mode
  • Proven hybrid technology comprised of gap-type and varistor-type components
  • Epoxy coating ensures stability under adverse environmental conditions
  • Two operating voltages
  • 50kA 8/20µs maximum surge rating
  • AREMA® binding post terminals
  • Exceeds AREMA® recommendations for arrestor applications
  • 5-year limited warranty


Part Number EPD2050F
Nominal System Voltage (Un) 50 VDC
35 VAC
Max Continuous Operating Voltage (Uc) 90 VDC
65 VAC
Voltage Protection Level (Up) 250 V @ 3 kA
Nominal Discharge Current (In) 30 kA 8/20 μs
Max Discharge Current (Imax) 50 kA 8/20 μs
Leakage Current @ Un 1 nA Max
Frequency 5 MHz Max
Protection Modes Single, L-L or L-PE
Technology Metal Oxide Varistor (MOV)
Gas Discharge Tube (GDT)
Connection Type AREMA® Stud-Type Terminals – 2 Post Terminal Block
Status Indication Mechanical flag
Enclosure Material UL® 94V-0 Thermoplastic
Enclosure Rating IP 20
Humidity 0 – 95 % RH
Temperature -40 to 176 °F
Length 1 (L1) 2 3/8"
Length 2 (L2) 3"
Length 3 (L3) 1.3"
Width 1 (W1) 0.95"
Width 2 (W2) 0.63"
Height 1 (H1) 2"
Height 2 (H2) 2.2"
Unit Weight 0.15 lb
Complies With ANSI®/IEEE® C62.41.2-2002 Cat A, Cat B, Cat C
AREMA® requirements
Color Transparent Blue
Standard Packaging Quantity 1 pc
UPC 78285686360
Frequency @ 3 dB / 120 Ω.

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ANSI is a registered trademark of American National Standards Institute.
AREMA is a registered trademark of American Railway Engineering and Maintenance-of-Way Association, Inc.
IEEE is a registered trademark of The Institute of Electrical and Electronics Engineers, Inc.
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.