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Mersen ST2771PG - Surge-Trap® Surge Protective Device is a no-fuse surge suppressor. The Surge-Trap is a UL 1449 Third Edition compliant modular style surge protective device that is DIN-rail mountable featuring a fail-safe self-protected design, visual indicator and a small foot print. A remote indicator option provides status to critical control circuit. The Surge-Trap provides advanced overvoltage protection utilizing Mersen's patented TPMOV® technology without additional protection devices. 277 Volts single phase system type .
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Mersen ST2771PG Surge-Trap® Surge Protective Device is a no-fuse surge suppressor. The Surge-Trap is a…

Alternate Item Number: ST2771PG

UPC: 782001361419


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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® ST2771PG is a UL 1449 5th Edition compliant, no-fuse surge protective device (SPD) designed for 277V single-phase systems. Engineered with Mersen’s patented TPMOV® technology, this DIN-rail mountable SPD eliminates the need for additional overcurrent protection, reducing installation complexity and cost. The ST2771PG features a fail-safe, self-protected design with a visual status indicator (green = functional, red = replace) and optional remote monitoring via Form C dry contacts for critical control circuits. With a surge current rating (Imax) of 50kA, nominal discharge current (In) of 10–20kA, and a short-circuit current rating (SCCR) of 200kA, this SPD is built to handle high-energy transients in demanding industrial environments. The reversible chassis allows cable entry from top or bottom, simplifying retrofits and new installations. Replaceable modules with mechanical coding prevent replacement errors, and the compact footprint maximizes panel space efficiency. Certified to ANSI/UL 1449 5th Edition, ANSI/IEEE C62.41.1/2/45, and RoHS compliant, the ST2771PG is ideal for industrial control panels, water treatment systems, smart grid applications, and traffic management infrastructure. Operating from -40°C to +85°C, the device meets IP20 finger-safe standards and UL94 V0 flammability requirements. Backed by a 5-year warranty, the ST2771PG delivers reliable, maintenance-free surge protection for low-voltage systems.
  • No-fuse, fail-safe design with Mersen TPMOV® technology eliminates need for backup overcurrent protection
  • UL 1449 5th Edition compliant, 277V single-phase system compatibility
  • 50kA surge current rating (Imax), 200kA short-circuit current rating (SCCR)
  • Visual (green/red) and optional remote Form C dry contact status indicators
  • DIN-rail mountable, reversible chassis for top/bottom cable entry, replaceable modules with mechanical coding

Specifications

Application
AC/DC distribution Power supplies Industrial automation Telecommunications Motor controls and starter systems Programmable logic controller (PLC) applications Power transfer equipment HVAC applications AC drives UPS systems Security systems IT / Data centers Medical equipment
Application
Industrial Control Panels Water treatment AC Drives Smart grid & LV Metering Security Systems Traffic / ITS applications. Intended for use on a wide range of low voltage applications inside appropriate enclosures
Brand Name
Mersen
Connection
Box
Frequency Rating
50/60 HZ
Material
TPMOV
Material
PET (Polyethelene Terphthalate)
Mounting
DIN Rail
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
1
Response Time
<25
Series
ST Series
Short Circuit Rating
200 kA
Short-Circuit Rating
200 kA
Size
3.58 x 0.7 x 2.7;90.932 x 17.78 x 68.58 in;mm
Special Features
Designed with industry leading Mersen TPMOV technology Easy installation Cost-effective protection Remote Indicator (optional) 2-year warranty
Special Features
Easy installation or retrofit Din-rail mountable Fail-safe /self-protected design Remote indicator (optional) with 3 pin NO/NC contact IP20 finger-safe design Visual indicator Small foot print No additional overcurrent protection devices needed
Standard
ANSI/UL 1449 5th Edition, Type 1 Component Assembly, File E210793 ANSI/IEEE C62.41.1, C62.41.2, C62.45 RoHS Compliant
Standard
UL 1449 Third Edition, File No E210793 Type 1 Component Assembly IEC 61643-1 ANSI/IEEE C62.41 CE RoHS compliant
Sub Brand
Surge-Trap®
Type
DIN-RAIL UL CSA TYPE 1
Type of Indicators
Visual Indicator
UL SPD Type
Type 1 Component Assembly
Voltage Rating
277 VAC
Package Dimensions (L x W x H)
3.58 IN x 0.7 IN x 2.7 IN
Package Dimensions (L x W x H)
9.0932 cm x 17.78 mm x 6.858 cm
Package Weight (Imperial)
0.250 L
Package Weight (Metric)
0.113 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.
Symmetrical DIN rail 2m 35x15x1,5 steel z-b

50000043

Symmetrical DIN rail 2m 35x15x1,5 steel z-b
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
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.

Frequently Asked Questions

What type of technology is used in Mersen Surge-Trap devices?

Mersen Surge-Trap devices utilize Thermally Protected MOV (TPMOV®) technology for improved surge protection and safety.

What is the operating temperature range for Mersen Surge-Trap devices?

The operating and storage temperature range for Mersen Surge-Trap devices is –31ºF (–35ºC) to +185ºF (85ºC).

What is the response time of Mersen Surge-Trap devices?

The response time for Mersen Surge-Trap devices is less than 1 nanosecond per phase.

What is the Short Circuit Current Rating (SCCR) for the STZ series?

The Short Circuit Current Rating (SCCR) for the STZ series is 200kA, permitting direct connection to most electrical services.

What is the warranty period for the Surge-Trap STZ Series?

The Surge-Trap STZ Series comes with a 15-year product warranty.

What is the surge current rating for the Surge-Trap STXT Series?

The Surge-Trap STXT Series has surge current ratings of 100kA and 200kA per phase.

What is the warranty for the Surge-Trap STXT Series?

The Surge-Trap STXT Series has a 10-year manufacturer's warranty.

What is the surge current rating for the Surge-Trap STXP Series?

The Surge-Trap STXP Series has a surge current rating of 100kA per phase.

What is the warranty for the Surge-Trap STXP Series?

The Surge-Trap STXP Series comes with a 10-year manufacturer's warranty.

What is the surge current rating for the Surge-Trap STXR Series?

The Surge-Trap STXR Series has a surge current rating of 50kA per phase and per mode.

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.