Mersen STXT43S2004XA - The Surge-Trap® Type 1 XT Series offers Advanced Technology. The XT features TPMOV® technology inside making it the safest product available. With line or load side installation flexibility, this unit is a great fit from the service entrance all the way down to each distribution and/or branch panel. 230/400 Volts 3P Wye system type 200 kA surge rating with alarm .
Mersen

STXT43S2004XA

Alternate Item Number: 782001429355

UPC: 782001429355

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Overview

The Mersen Surge-Trap® Type 1 XT Series (SKU: STXT43S2004XA) represents the pinnacle of surge protection technology, engineered to safeguard critical electrical infrastructure against transient overvoltages. At its core, this advanced Surge Protective Device (SPD) incorporates Mersen’s proprietary TPMOV® (Thermal Protected Metal Oxide Varistor) technology, a breakthrough in surge suppression that delivers unparalleled safety and reliability. Unlike conventional varistor-based solutions, TPMOV® technology integrates thermal protection directly into the varistor module, preventing catastrophic failure and ensuring continuous operation even under extreme surge conditions. This makes the XT Series the safest Type 1 SPD available on the market today. Designed for versatility, the Surge-Trap® XT Series offers unmatched installation flexibility, accommodating both line-side and load-side configurations. This dual-capability design simplifies integration into virtually any electrical system, from the service entrance to downstream distribution panels and branch circuits. The unit is optimized for 230/400V three-phase wye systems, making it an ideal solution for industrial facilities, commercial buildings, data centers, healthcare campuses, and utility substations where power quality is non-negotiable. Its robust 200 kA surge rating ensures protection against the most severe transient events, including lightning strikes and switching surges, while the integrated alarm system provides real-time status monitoring, enabling proactive maintenance and minimizing downtime. Professionals in the electrical engineering and facilities management sectors consistently choose Mersen for surge protection solutions due to the company’s decades-long reputation for innovation and reliability. Mersen, a global leader in electrical protection and thermal management, has been at the forefront of SPD technology since the inception of the Surge-Trap® brand. The Type 1 XT Series is no exception, featuring a compact, modular design that simplifies installation in tight enclosures or crowded electrical rooms. Its high efficiency and low let-through voltage ensure that sensitive equipment—such as PLCs, variable frequency drives (VFDs), servers, and medical imaging devices—remains protected without compromising performance. Selecting the right SPD for an application requires careful consideration of system voltage, configuration, and environmental conditions. The Surge-Trap® XT Series addresses these needs with a robust design that meets or exceeds industry standards, including UL 1449 4th Edition and IEC 61643-11. The 3P Wye configuration is particularly well-suited for systems requiring neutral-to-ground bonding, such as those found in commercial and light industrial settings. Additionally, the unit’s alarm contacts can be wired to building management systems (BMS) or SCADA platforms, enabling remote monitoring and alerting for maintenance teams. For engineers and contractors tasked with designing or retrofitting electrical systems, the Surge-Trap® XT Series offers a future-proof solution that scales with evolving power demands. Whether installed at the service entrance to protect an entire facility or deployed at branch panels to safeguard specific loads, this SPD delivers consistent, high-performance protection. Its combination of advanced technology, installation flexibility, and Mersen’s trusted brand reputation makes it a preferred choice for professionals who demand the highest standards in electrical safety and reliability. Invest in the Surge-Trap® XT Series (STXT43S2004XA) to ensure your electrical systems remain resilient against the unpredictable nature of power surges.
  • Advanced TPMOV® technology for unmatched surge protection and safety
  • 200 kA surge rating for extreme transient event defense
  • Line or load side installation flexibility for versatile deployment
  • Integrated alarm system for real-time status monitoring
  • Compact, modular design optimized for industrial and commercial applications

Specifications

Application
Service Entrance AC Distribution Power supplies Drive Protection Large Control Panels Telecommunications IT / Data centers
Brand Name
Mersen
Color
Blue
Connection
Box
Connection Type
Screw Terminal
Frequency
50/60 Hz
Material
Poly
Mounting
Screw
Mounting Type
Line or Load Side
Poles
3P
Series
XT Series
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Special Features
UL 1449 Third Edition Listed (Sept 2009) Type 1 SPD – All UL required OCP & safety coordination included inside 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) NEMA 4X polycarbonate enclosure – UL 746C(f1) & UL 94-5VA TPMOV&reg, Technology Inside All MOV suppression elements monitored Filtering - AC sinewave tracking filter with EMI/RFI filtering up to -50dB from 10khz to 100mhz Phase-loss monitoring (toggles LED and dry contacts) Ten-year Warranty
Standard
UL 1449 Third Edition, cUL, UL 1283 R/C UL File: VZCA.E210793 RoHS Compliant IEC 61643 CE Burn-In tested prior to shipment UL 96A lighting protection master label
Sub Brand
Surge-Trap®
Type
Surge-Trap Type 1 & 2
Type Of Indicators
LED
Voltage Rating
230/400 VAC
Voltage Rating
400 VAC
Package Dimensions (L x W x H)
10 IN x 10 IN x 5.5 IN
Package Dimensions (L x W x H)
25.4 cm x 25.4 cm x 13.97 cm
Package Weight (Imperial)
5.250 L
Package Weight (Metric)
2.381 kg
Ethernet SHDSL Extender

DDW-120

Ethernet SHDSL Extender
Fiber cable ODC to SC duplex - 670mm

Fiber cable ODC SC Duplex 670mm

Fiber cable ODC to SC duplex - 670mm
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
DIN Rail ? DIN 35

ARH 1656

DIN Rail ? DIN 35
24U 21.34W 31.5D CABINET BLK

REFK1904231BK1

24U 21.34W 31.5D CABINET BLK
Super-Safeway® Multiple Outlet Box, Extended Depth, 2-Sided, F2 (1/2") Cord Grip Body, with Flip Lids for (2) Duplex Not Included

3085

Super-Safeway® Multiple Outlet Box, Extended Depth, 2-Sided, F2 (1/2") Cord Grip Body, with Flip Lids for (2) Duplex Not Included
Cable Manager, fits 19-inch open rack, Black, Steel

ECK19H

Cable Manager, fits 19-inch open rack, Black, Steel
DataCom Enclosure Pkg, Bulletin DPVD (PROLINE® Voice and Data Package - PROLINE Voice and Data Package), Size/Dims: 2000x700x800mm, Material: Steel, Finish: Lt Gray

PDCP2078

DataCom Enclosure Pkg, Bulletin DPVD (PROLINE® Voice and Data Package - PROLINE Voice and Data Package), Size/Dims: 2000x700x800mm, Material: Steel, Finish: Lt Gray
6U PERF PANEL

PPFS19010BK

6U PERF PANEL
This TX6A 10Gig Cat 6A STP Patch Cord is a 12-Meter, Int'l Grey cord constructed of 26 AWG, shielded, twisted pair, stranded, CM/LSZH cable and with high-performance modular plugs. Its tangle-free latch prevents snags and ensures a fast release, streamlining moves, adds, and changes. The slender strain relief boot provides easy access in high-density applications. Enabled with RapidID, the product has pre-installed barcodes for simple port mapping using RapidID software.

STP6X12MIG

This TX6A 10Gig Cat 6A STP Patch Cord is a 12-Meter, Int'l Grey cord constructed of 26 AWG, shielded, twisted pair, stranded, CM/LSZH cable and with high-performance modular plugs. Its tangle-free latch prevents snags and ensures a fast release, streamlining moves, adds, and changes. The slender strain relief boot provides easy access in high-density applications. Enabled with RapidID, the product has pre-installed barcodes for simple port mapping using RapidID software.
OM1 2 fiber, 16mm jacket, patchcord, Riser (OFNR) rated, LC duplex to SC duplex, Std IL

F62ERLNSNSNM002

OM1 2 fiber, 16mm jacket, patchcord, Riser (OFNR) rated, LC duplex to SC duplex, Std IL
Membrane plate cable entry system offers a good strain relief while maintaining IP/NEMA ingress sealing rating. The CESUM3-C15 is a Rectangular Un-Terminated Cable Entry System, 4.1" (103 mm) Long, with 8 Openings 0.12" (3.0 mm) to 0.31" (8 mm), 3 Openings 0.20" (5.1 mm) to 0.35" (9.0 mm), 4 Openings 0.3" (7.5 mm) to 0.47" (12.0 mm). Color is Black. Standard Package Quantity is 1 PC.

CESUM3-C15

Membrane plate cable entry system offers a good strain relief while maintaining IP/NEMA ingress sealing rating. The CESUM3-C15 is a Rectangular Un-Terminated Cable Entry System, 4.1" (103 mm) Long, with 8 Openings 0.12" (3.0 mm) to 0.31" (8 mm), 3 Openings 0.20" (5.1 mm) to 0.35" (9.0 mm), 4 Openings 0.3" (7.5 mm) to 0.47" (12.0 mm). Color is Black. Standard Package Quantity is 1 PC.

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.