Authorized Mersen Distributor
Mersen STXP240D10A - 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., 240V, L-G, L-L, 3-Phase Delta, LED and Remote Audible Alarm 100 kA per phase
More images
Installation images

Mersen STXP240D10A The Surge-Trap® Type 1 STXP Series offers advanced performance and features over the…

Alternate Item Number: STXP240D10A

UPC: 782001470562


Documents & Media
BrochureInstallation InstructionsLine Drawing3D CAD Model (STEP)Specification SheetWarranty

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen Surge-Trap® Type 1 STXP240D10A is a high-capacity surge protection device designed for 240V, 3-phase Delta systems. Rated at 100 kA per phase, it exceeds UL1449 Fourth Edition requirements for superior surge handling. Built with TPMOV® technology inside, this unit offers the safest surge protection available and eliminates the need for additional overcurrent protection. The STXP240D10A supports flexible installation options, including mounting feet and flush-mount capability, making it adaptable to service entrances, distribution panels, and machine-specific control panels. Phase LED status indicators provide real-time monitoring, while a remote audible alarm option enhances system awareness. This unit is rated for both line and load side panel installation, offering redundant surge protection. The STXP Series offers advanced performance and features over the STXR series including higher surge capacity. The STXP240D10A is the perfect fit from service entrance all the way down to an important machine specific control panel.
  • 240V, 3-phase Delta system compatibility
  • 100 kA per phase surge capacity
  • TPMOV® technology for maximum safety
  • Phase LED status indicators and remote audible alarm
  • Flexible mounting options: panel, side, or flush-mount

Specifications

Application
Service entrance at low to medium risk exposure level Commercial and Industrial Distribution Panels Control Panels
Brand Name
Mersen
Connection
Pre-wired with 3 ft 12 AWG conductors
Connection
Pre-wired
Connection Type
L-G, L-L
Connection Type
Line or Load Side of Panel
Current Rating
100 kA per phase
Current Rating
100 kA
Frequency
50-60 Hz
Frequency Rating
50/60 HZ
Frequency Rating, Maximum
60 Hz
Frequency Rating, Minimum
50 Hz
Insulation
Polycarbonate
Material
Polycarbonate
Mounting
Panel or Wall Mount
Mounting Type
Panel, Side, or Flush Mount
Mounting Type
panel mounting, side mounting, flush-mount
Mounting Type
Panel mounted, side mounted, flush mount
Mounting Type
Panel, Side, Flush-Mount
Operating Temperature, Maximum
185 F
Operating Temperature, Maximum
85 C
Operating Temperature, Minimum
-40 F
Operating Temperature, Minimum
-40 C
Phase
3-
Poles
3-Phase Delta
Series
STXP
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
7.49 x 3.13 x 2.72;190.246 x 79.502 x 69.088 in;mm
Special Features
Designed with the industry leading Mersen TPMOV® Technology (internally fused) Enhanced 100kA surge capacity for longer life and higher single impulse withstand LED status indicator (ON = Good, OFF = Replace) LED phase loss indicators (ON = Operational,OFF = Maintenance Required) NEMA 4X enclosure for outdoor or indoor use Mounting hub and mounting feet for installation flexibility Pre-wired with 3' leads for easy installation Optional flush-mount kit for in-wall installation 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, N-G) 10-year warranty
Special Features
Designed with industry leading Mersen TPMOV technology Fits 3/4" knockouts with 36" cable leads for easy installation Up to 10 Modes of Protection 10-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 4th 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
Type
NEMA UL CSA TYPE 1
Type of Indicators
LED and Remote Audible Alarm
UL SPD Type
Type 1
Voltage Rating
240 V
Package Dimensions (L x W x H)
10.12 IN x 7.06 IN x 3.44 IN
Package Dimensions (L x W x H)
25.7048 cm x 17.9324 cm x 8.7376 cm
Package Weight (Imperial)
2.840 L
Package Weight (Metric)
1.288 kg
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
The TX6A™ 10Gig Cat 6A UTP Patch Cord is a 1-Meter, Blue cord constructed of 24 AWG, unshielded, twisted pair stranded, LSZH (60332-1) cable with high-performance modular plugs. Its MaTriX Tape Technology limits alien crosstalk, ensuring 10 Gb/s transmission. The tangle-free latch prevents snags and ensures a fast release, streamlining moves, adds, and changes. Enabled with RapidID, the product has pre-installed barcodes for simple port mapping using RapidID software.

UTP6AL1MBU

The TX6A™ 10Gig Cat 6A UTP Patch Cord is a 1-Meter, Blue cord constructed of 24 AWG, unshielded, twisted pair stranded, LSZH (60332-1) cable with high-performance modular plugs. Its MaTriX Tape Technology limits alien crosstalk, ensuring 10 Gb/s transmission. The tangle-free latch prevents snags and ensures a fast release, streamlining moves, adds, and changes. Enabled with RapidID, the product has pre-installed barcodes for simple port mapping using RapidID software.
5-port Ethernet Switch

SDI-550

5-port Ethernet Switch
The Mini-Com Flush Mount Modular Patch Panel accepts up to 24 Mini-Com Modules for unshielded applications in 1 RU, and mounts to 19 inch and 23 inch racks and cabinets. The panel mounts flush with the rack and can be identified with adhesive labels and is black.

CPP24FMWBLY

The Mini-Com Flush Mount Modular Patch Panel accepts up to 24 Mini-Com Modules for unshielded applications in 1 RU, and mounts to 19 inch and 23 inch racks and cabinets. The panel mounts flush with the rack and can be identified with adhesive labels and is black.
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
24U 21.34W 31.5D CABINET BLK

REFK1904231BK1

24U 21.34W 31.5D CABINET BLK
6U PERF PANEL

PPFS19010BK

6U PERF PANEL
DIN rail is a universal mounting option for electrical and industrial control products such as circuit breakers electrical supplies terminal blocks and more. The rail system is used to stabilize a wide variety of devices and products. Ordering pre-cut DIN rail helps increase productivity and decrease jobsite clutter. On-site Flexibility Streamline custom cuts DIN rail to any length so it is ready to use when it arrives on the jobsite. Additionally DIN rail can be easily removed if relocation is necessary. Features of Custom DIN Rail from Streamline - All cut DIN rail from Streamline is galvanized steel made to eliminate rusting. Streamline ensures that all custom DIN rail orders are: De-burred Custom Length Any quantity 1-1000+ Quick turnaround (typically 2 weeks or less from receipt of order) This mechanical support structure is a must for all electrical parts solutions big or small. DIN rail allows for mounting hardware easily and quickly. These durable and versatile rails make the perfect solution for all mounting applications. Save space time and money with these cost-effective mounting solutions. Order your custom cut DIN rail today!

CUSTOMDIN

DIN rail is a universal mounting option for electrical and industrial control products such as circuit breakers electrical supplies terminal blocks and more. The rail system is used to stabilize a wide variety of devices and products. Ordering pre-cut DIN rail helps increase productivity and decrease jobsite clutter. On-site Flexibility Streamline custom cuts DIN rail to any length so it is ready to use when it arrives on the jobsite. Additionally DIN rail can be easily removed if relocation is necessary. Features of Custom DIN Rail from Streamline - All cut DIN rail from Streamline is galvanized steel made to eliminate rusting. Streamline ensures that all custom DIN rail orders are: De-burred Custom Length Any quantity 1-1000+ Quick turnaround (typically 2 weeks or less from receipt of order) This mechanical support structure is a must for all electrical parts solutions big or small. DIN rail allows for mounting hardware easily and quickly. These durable and versatile rails make the perfect solution for all mounting applications. Save space time and money with these cost-effective mounting solutions. Order your custom cut DIN rail today!
Fiber cable ODC to SC duplex - 670mm

Fiber cable ODC SC Duplex 670mm

Fiber cable ODC to SC duplex - 670mm
Cable Manager, fits 19-inch open rack, Black, Steel

ECK19H

Cable Manager, fits 19-inch open rack, Black, Steel
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.

How to Install the STXP240D10A Surge Protective Device

This guide provides step-by-step instructions for installing and configuring the STXP240D10A Surge Protective Device 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 used outdoors)

  1. Confirm system compatibility

    Verify that the system voltage and configuration match the SPD voltage and configuration before proceeding with the installation.

  2. Power down the system

    Turn off all power supplying the equipment and confirm that all sources are de-energized to prevent electrical shock.

  3. Determine mounting location

    Choose a mounting location for the SPD that is as close to the equipment as possible, ensuring that the LED status indicator is visible and keeping leads straight and short.

  4. Mount the SPD

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

  5. Make electrical connections

    Connect the SPD according to the wiring diagram provided, ensuring to trim leads to the shortest length possible and avoid sharp bends.

  6. Energize the system

    Turn the power back on and confirm the proper operation of the green LED status indicator, ensuring that it is lit to indicate good functionality.

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.