United StatesChange

Universal Transient Barrier, Intrinsic Safe


  • Separate plug and base design allows hot swappable module replacement
  • Multi-stage protection and fine over-voltage protection helps ensure lowest residual surge voltages reach sensitive equipment
  • Common-mode and differential-mode protection protects against both possible surge conditions
  • Surge rating to 20 kA 8/20 μs is ideal for exposed wiring
  • For use in intrinsically safe areas


Part Number UTB15EX UTB30EX
Nominal System Voltage (Un) 3 - 10 VAC
5 - 15 VDC
10 - 21 VAC
15 - 30 VDC
Max Continuous Operating Voltage (Uc) 12 VAC
17 VDC
23 VAC
33 VDC
Rated Load Current (IL) 400 mA 80 mA
Frequency 1 MHz 2 MHz
Loop Resistance 1 Ω
Max Discharge Current (Imax), Per Mode 20 kA 8/20 μs
Protection Modes Common
Technology Gas Discharge Tube (GDT)
Silicon Avalanche Diode (SAD)
Voltage Protection Level (Up), L-L 25 V @ 3 kA 44 V @ 3 kA
Connection, Stranded #18 – #10
Mounting 35 mm top hat DIN rail
Temperature -22 to 149 °F
Enclosure Material UL® 94V-0 Thermoplastic
Enclosure Rating IP 20
Depth (D) 2.68"
Height (H) 3.54"
Width (W) 0.7"
Unit Weight 0.22 lb
Certification Details UL® 497B
UL® 913
Complies With ANSI®/IEEE® C62.41.2-2002 Cat A, Cat B, Cat C
Replacement Module UTB15MEX UTB30MEX

nVent, nVent CADDY, nVent ERICO, nVent ERIFLEX, and nVent LENTON are owned by nVent or its global affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without prior notice.

ANSI is a registered trademark of American National Standards Institute.
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.




UR QVGQ2.E220382