Mersen STXR347V1P50 - The Surge-Trap® Type 1 XR Series meets requirements for UL1449 Third Edition and is ideal for the replacement of surge arrestors. The XR Series SPD feature TPMOV® technology inside making them the safest product available. With a small, compact design and line or load installation flexibility the XR series is the perfect fi from service entrance all the way down to a specific control panel. 347 Volts single phase system type .
Mersen

STXR347V1P50

Alternate Item Number: 782001428693

UPC: 782001428693


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Overview

The Mersen Surge-Trap® STXR347V1P50 is a Type 1 Surge Protective Device (SPD) designed for industrial and commercial applications, meeting ANSI/UL 1449 5th Edition standards. This unit is an ideal replacement for outdated surge arrestors and features Mersen's proprietary TPMOV® technology, ensuring enhanced safety and reliability by providing integrated thermal protection and preventing thermal runaway. The STXR series does not require additional overcurrent protection. Engineered for versatility, the STXR347V1P50 boasts a compact design with flexible installation options, suitable for both line and load side mounting. This makes it perfect for protecting branch panels, commercial and industrial distribution panels, and individual control panels. The device is equipped with a bright LED status indicator, visible through a clear cover, indicating functional status (Green = Functional, OUT = Replace). Key specifications include a 50kA Surge Current Rating (Imax) per phase and per mode, a 20kA Nominal Discharge Current (In) (8x20 μs), and a 200kA Short Circuit Current Rating (SCCR). It operates on system voltages from 120VAC to 600VAC and has a response time of less than 1 nanosecond. The unit mounts easily into 3/4" knockouts with pre-wired 36" (1m) 10AWG leads. The NEMA 4X non-metallic enclosure offers protection for indoor or outdoor use, with an operating and storage temperature range of -40ºF (-40ºC) to +185ºF (85ºC). The STXR347V1P50 comes with a 5-year manufacturer's warranty and is RoHS Compliant. It also meets CSA C22.2 Type 1 SPD and UL96A Lightning Protection standards.
  • Meets ANSI/UL 1449 5th Edition, Type 1 SPD standards
  • Features Mersen's TPMOV® technology for enhanced safety
  • 50kA Surge Current Rating (Imax) per phase & per mode
  • 200kA Short Circuit Current Rating (SCCR)
  • Compact design with flexible line or load installation

Specifications

Application
AC Distribution Power supplies Drive Protection Fire Alarms Control Panels Telecommunications Residential IT / Data centers
Brand Name
Mersen
Color
Blue
Connection Type
Screw Terminal
Frequency
60 Hz
Material
Poly
Mounting
Din Rail / Panel / Bracket
Mounting Type
Line or Load Side
Nema Rating
Type 4X
Poles
1P+G
Series
XR Series
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
Compact
Special Features
UL 1449 Third Edition Listed,Type 1 SPD Can be installed line-side or load-side of main disconnect 20kA Nominal discharge current 200kA SCCR (most models) UL 96A Lightning Protection Master Label compliant (@20kA, In) Large block 50kA TPMOV&reg, Pre-wired with 3’ (1m) of #10 AWG conductor Standard NEMA 4X polycarbonate enclosure Tri-mount installation kit Included (pipe nipple, bracket, DIN-rail) Two-year warranty
Standard
UL 1449 Third Edition File VZCA.E210793 IEC 61643 CE ANSI/IEEE C62.41 Burn-In tested prior to shipment UL 96A lighting protection master label (Most Models)
Sub Brand
Surge-Trap®
Type
Surge-Trap Type 1 & 2
Type Of Indicators
LED
Voltage Rating
347 VAC
Package Dimensions (L x W x H)
11 IN x 6.25 IN x 4.5 IN
Package Dimensions (L x W x H)
27.94 cm x 15.875 cm x 11.43 cm
Package Weight (Imperial)
1.680 L
Package Weight (Metric)
0.762 kg
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
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CESUM3-C15

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Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.