Submittal Sheet

Customer Service +1.800.304.6563
[e-mail]
Robertshaw® and Uni-Line® are trademarks of Robertshaw,
its subsidiaries and/or affiliated companies. All other brands
mentioned may be the trademarks of their respective
owners.
For Technical Service
Telephone [phone]
[e-mail]
www.robertshaw.com
©2018 Robertshaw
6/18 – 150-2679
Specicaons
SURGE
PROTECTIVE
DEVICES
SURGE-TRAP
®
SERIES
Distributed by Uni-Line®
Part Numbers STXH240S05 STXR480Y05 STXR480Y05A
Description Surge Protective Device Surge Protective Device Surge Protective Device with
Optional audible alarm and remote dry contacts
Electrical rating 120/240V AC, 50/60Hz 277/480V AC, 50/60Hz 277/480V AC, 50/60Hz
Phase Single 3 Phase WYE 3 Phase WYE
Modes of Protection 3 10 10
Surge Capacity 50 kA 50 kA 50 kA
Nominal Discharge Current
Rating (In)
20 kA 20 kA 20 kA
Short Circuit Current Rating
(SCCR)
200 kA 200 kA 200 kA
Max. Continuous Operating
Voltage (MCOV)*
L-L 300, L-N 150 L-L 640, L-N 320, L-G 470, N-G 150 L-L 640, L-N 320, L-G 470, N-G 150
Voltage Protection Rating
(VPR)*
L-L 1000, L-N 600 L-L 2000, L-N 1200, L-G 1800, N-G 700 L-L 2000, L-N 1200, L-G 1800, N-G 700
Flammability UL94-5VA UL94-5VA UL94-5VA
End-of-Life LED Indicator Yes Yes Yes
Wiring Pre-wired 18” 10 AWG Pre-wired 3’ (1m) 10 AWG Pre-wired 3’ (1m) 10 AWG
Mounting Type 1⁄2” – 14 threaded hub. Includes
sealing locking washer,
1⁄2” knockouts with 18” leads
3⁄4” – 14 threaded hub includes locking washer,
3⁄4” knockouts with 3’ leads, Optional mounting
bracket for surface mount applications
3⁄4” – 14 threaded hub includes locking washer,
3⁄4” knockouts with 3’ leads, Optional mounting
bracket for surface mount applications
Operating Temperature -40°F to 185°F
(-40°C to 85°C)
-40°F to 185°F
(-40°C to 85°C)
-40°F to 185°F
(-40°C to 85°C)
*Note: L-N = Line to Neutral, L-L = Line to Line, L-G = Line to Ground, N-G = Neutral to Ground
Surge Protecon Terms to Know
• Surge – The uctuaon in power that may cause damage to
electrical equipment including HVAC equipment and appliances.
• Metal Oxide Varistor (MOV) – The most common SPD technology.
• Thermally Protected Metal Oxide Varistor (TPMOV) – Mersen’s
patented SPD technology; rated the best performing, most reliable
surge suppression technology on the market.
• Maximum Connuous Operang Voltage (MCOV) – The maximum
steady state voltage the SPD can withstand without becoming a re
or safety hazard. Also known as surge capacity or surge rang.
• UL1449 4th Edion – Meets Underwriter’s Laboratory highest
standard of tesng for SPDs.
• Nominal Discharge Current (IN) – UL’s test program term to measure
peak current that can pass through a SPD and remains funconal
aer 15 surges. The highest nominal discharge current rang by UL
is 20kA.
• Short Circuit Current Rang (SCCR) – The amount of “available”
current the SPD can be subjected to and also safely disconnect from
the power source under short circuit condions.
• Voltage Protecon Rang (VPR) – The voltage allowed through the
SPD aer protecng a surge event. Similar to a golf score, the lower
the rang, the beer.
• Type 1 Surge Protecon – Protect sensive electronics from the
damaging eects of electrical surges; installed before the main device
in the load center.
• Type 2 Surge Protecon – Protect sensive electronics from the
damaging eects of electrical surges. Intended for the installaon of
AC power and cable at the point of entrance to the building.