Mersen STP240HN05 - The Mersen STP240HN05 is a pluggable Surge-Trap SPD (SKU: STP240HN05) featuring TPMOV® technology for no-fuse, failsafe surge suppression. Designed for industrial control panels, it mounts directly to a DIN rail with a compact footprint. The device includes a visual indicator and remote indicator output for status monitoring. Built with a high short-circuit current rating, it eliminates the need for additional overcurrent protection. Ideal for protecting sensitive control circuitry in 24V DC systems.
Mersen

STP240HN05

Alternate Item Number: STP240HN05

UPC: 782001510190


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Overview

The Mersen STP240HN05 pluggable Surge-Trap SPD delivers failsafe surge suppression for 24V DC industrial control panels using TPMOV technology. This DIN-rail mountable device eliminates the need for external overcurrent protection with a high short-circuit current rating, reducing system complexity and cost. Its compact footprint integrates seamlessly into control panels while providing visual and remote indicator outputs for real-time status monitoring. Designed for sensitive control circuitry, the STP240HN05 ensures reliable protection against transient voltage spikes without requiring fuse coordination. The pluggable design enables quick replacement during maintenance, minimizing downtime. Ideal for automation, motor control, and instrumentation applications where 24V DC systems require robust surge protection. The device meets industrial standards for reliability and durability in harsh environments.
  • TPMOV technology for no-fuse, failsafe surge suppression
  • DIN-rail mountable with compact footprint
  • Visual and remote indicator outputs for status monitoring
  • High short-circuit current rating eliminates need for external overcurrent protection
  • Pluggable design enables quick replacement during maintenance

Specifications

Application
Industrial Control Panels Water treatment Smart grid & LV Metering Traffic / ITS applications. Intended for use on a wide range of low voltage applications inside appropriate enclosures
Connection
Box
Connection Type
DIN-rail
Frequency Rating
50/60 HZ
Material
PET (Polyethelene Terphthalate)
Mounting
DIN Rail
Mounting Type
DIN-Rail
Operating Temperature, Maximum
185 F
Operating Temperature, Maximum
85 C
Operating Temperature, Minimum
-40 F
Operating Temperature, Minimum
-40 C
Phase
3
Response Time
<25
Series
STP
Series
Surge-Trap
Size
4.19 x 2.76 x 2.81;106.426 x 70.104 x 71.374 in;mm
Special Features
Mersen TPMOV Technology – does not require additional overcurrent protection Easy installation or retrofit Reversible chassis allows cable entry from top or bottom Replaceable modules with mechanical coding to avoid replacement errors Surge capacity upgradable to 75kA 5-year warranty
Special Features
Designed with industry leading Mersen TPMOV technology Easy installation or retrofit Reversible chassis allows cable entry from top or bottom Replaceable modules with mechanical coding to avoid replacement errors 5-year warranty
Standard
ANSI/UL 1449 5th Edition, Open Type 1 SPD Listed, File E210793 ANSI/IEEE C62.41.1, C62.41.2, C62.45 RoHS Compliant
Standard
ANSI/UL 1449 5th Edition Open Type 1 SPD, File E210793 CSA C221331certified Type 4-1, File 80032802 ANSI/IEEE C62.41.1, C62.41.2, C62.45 RoHS Compliant
Type
DIN-RAIL UL CSA TYPE 1
UL SPD Type
Type 1
Voltage Rating
24 VDC
Package Dimensions (L x W x H)
4.19 in x 2.76 in x 2.81 in
Package Dimensions (L x W x H)
106.426 mm x 70.104 mm x 71.374 mm
Package Weight (Imperial)
1.550 lb
Package Weight (Metric)
0.703 kg
Power supply for DIN-rail

PS-60

Power supply for DIN-rail
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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.
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How to Install the STP480D05M Surge Protective Device

This guide provides step-by-step instructions for installing the STP480D05M Surge Protective Device on a DIN rail, ensuring proper electrical connections and safety measures.

Estimated time: 45m

Tools needed:

Screwdriver, Wire strippers, Multimeter

Supplies needed:

Mounting screws, Terminal connectors

  1. Confirm system voltage

    Verify that the system voltage and configuration match the specifications of the STP480D05M Surge Protective Device.

  2. Turn off power

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

  3. Mount the SPD

    Mount the STP480D05M onto a 35mm DIN rail by hooking the line side over the rail and pushing the load side until the spring-loaded mounting clip clicks into place.

  4. Make electrical connections

    Connect the electrical wiring to the SPD, ensuring that the interconnecting wires are kept as short as possible and that the bending radius is greater than 100mm (4 inches).

  5. Verify connections

    Use a multimeter to check that all connections are secure and that there are no shorts or open circuits.

  6. Power on the system

    Once all connections are verified, restore power to the system and monitor for any irregularities.

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.