Mersen STXRMBK - The most popular range in the STX series offering, the Surge-Trap® Type 1 STXR meets requirements for UL1449 Fourth Edition and is ideal for the replacement of older surge arrestors. The STXR Series SPD feature TPMOV® technology inside making them the safest product available. With a small, compact design and line or load installation flexibility the STXR series is the perfect fit for branch panel and/or individual equipment protection., V, ,
Mersen

STXRMBK

Alternate Item Number: STXRMBK

UPC: 782001470760


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Overview

The Mersen Surge-Trap® STXRMBK is a UL1449 5th Edition Type 1 Surge Protective Device (SPD) designed for ANSI/UL Type 1 or 2 installations in commercial and industrial environments. This compact, panel-mount SPD features Mersen’s proprietary TPMOV® technology, delivering industry-leading surge protection with up to 10 modes of protection (L-N, L-L, L-G optional, N-G optional). The STXRMBK supports voltages from 120V to 600VAC, with a nominal discharge current rating of 10-20kA and a surge capacity of 50kA per phase per mode. Its NEMA 4X-rated enclosure ensures reliable performance in both indoor and outdoor applications, while the 3/4" knockout compatibility with 36" leads simplifies installation. Optional accessories include a mounting bracket for surface mounting, an audible alarm (suffix "A"), and Form C dry contacts (suffix "AN") for remote monitoring. The STXRMBK does not require additional overcurrent protection and is ideal for branch panel protection, control panels, and individual equipment safeguarding. Backed by a 5-year manufacturer’s warranty, this SPD is a direct replacement for obsolete surge arrestors and meets CSA C22.2, ANSI/IEEE C62.41.1, C62.41.2, C62.45, and UL96A standards. For installations requiring N-G protection, add suffix "N" to the part number. The STXRMBK is distributed by Gross Automation and manufactured in the US.
  • UL1449 5th Edition Type 1 SPD, File E210793 compliant
  • TPMOV® technology for advanced surge protection
  • 10-20kA nominal discharge current rating
  • NEMA 4X enclosure for indoor/outdoor use
  • Supports up to 10 modes of protection (L-N, L-L, L-G, N-G optional)
  • Compact design with 3/4" knockout and 36" leads for easy installation
  • Optional audible alarm and Form C dry contacts for remote monitoring
  • 5-year manufacturer’s warranty
  • No additional overcurrent protection required
  • CSA C22.2 and ANSI/IEEE compliant

Specifications

Application
Branch panel and/or individual equipment protection Commercial and Industrial Distribution Panels Control Panels
Brand Name
Mersen
Connection Type
Line or Load Installation
Frequency
50-60 Hz
Frequency Rating
50/60 HZ
Frequency Rating, Maximum
60 Hz
Frequency Rating, Minimum
50 Hz
Insulation
Aluminum
Material
Aluminum
Mounting
Bracket
Mounting Type
Branch Panel or Individual Equipment
Operating Temperature, Maximum
185 F
Operating Temperature, Maximum
85 C
Operating Temperature, Minimum
-40 F
Operating Temperature, Minimum
-40 C
Series
STXR
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
2.95 x 2 x 0.95;74.93 x 50.8 x 24.13 in;mm
Size
Compact
Special Features
Designed with the industry leading Mersen TPMOV® Technology LED status indicator (ON = Good, OFF = Replace) NEMA 4X enclosure for outdoor or indoor use Fits 3/4" knockouts with 3' leads for easy installation Optional mounting bracket for surface mount applications Optional audible alarm and remote dry contacts For use in ANSI/UL Type 1 or 2 SPD installations Up to 10 modes of Protection (L-N, L-L, L-G optional, N-G optional) 5-year warranty
Special Features
Designed with industry leading Mersen TPMOV technology Optional mounting bracket for surface mount applications NEMA 4X enclosure for outdoor or indoor use Fits 3/4" knockouts with 3' leads for easy installation Up to 10 modes of Protection (L-N, L-L, L-G optional, N-G optional) Bright LED status indicator, visible from side profile through clear cover 5-year manufacturer’s warranty
Standard
ANSI/UL 1449 5th Edition, Type 1 SPD, File E210793 CSA C22.2, Type 1 SPD ANSI/IEEE C62.41.1, C62.41.2, C62.45 UL96A Lightning Protection RoHS Compliant
Standard
ANSI/UL 1449 5th Edition, Type 1 SPD, File E210793 CSA C22.2, Type 1 SPD UL96A Lightning Protection RoHS Compliant
Type
NEMA UL CSA TYPE 1
UL SPD Type
Type 1
Package Weight (Imperial)
0.200 L
Package Weight (Metric)
0.091 kg
The Surge-Trap® Type 1 STXP Series offers advanced performance and features over the STXR series including higher surge capacity and phase LED status indicators. The STXP meets requirements for UL1449 Fourth Edition and has been designed for additional mounting flexibility including mounting feet and flush-mount capability. The STXP features TPMOV® technology inside making it the safest product available. Installation can be done on the line or load side of a panel. The STXP is the perfect fit from service entrance all the way down to an important machine specific control panel., V, 0, ,

STXPFMK

The Surge-Trap® Type 1 STXP Series offers advanced performance and features over the STXR series including higher surge capacity and phase LED status indicators. The STXP meets requirements for UL1449 Fourth Edition and has been designed for additional mounting flexibility including mounting feet and flush-mount capability. The STXP features TPMOV® technology inside making it the safest product available. Installation can be done on the line or load side of a panel. The STXP is the perfect fit from service entrance all the way down to an important machine specific control panel., V, 0, ,

How to Install the STXR Series Surge Protective Device

This guide provides step-by-step instructions for installing the STXR Series Surge Protective Device (SPD) to protect your equipment from transient overvoltages.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors, Watertight fittings (if applicable)

  1. Turn off power

    Ensure all power supplying the equipment is turned off and confirm that the equipment and all sources are de-energized.

  2. Determine mounting location

    Identify a mounting location for the SPD that is as close to the equipment as possible, ensuring that the LED status indicator will be visible.

  3. Mount the SPD

    Secure the SPD to the mounting surface using appropriate mounting screws, ensuring it is level and firmly attached.

  4. Make electrical connections

    Connect the SPD leads according to the wiring diagram provided, ensuring leads are trimmed to the shortest length possible and avoiding sharp bends.

  5. Energize the system

    Turn the power back on and check the green LED status indicator to confirm proper operation. If the LED is off, troubleshoot the connections.

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.