Mersen S331170 - Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 22x58 3-Pole Visual Indicator Pressure Plate IP20
Mersen

S331170

Alternate Item Number: US223I

UPC: 782001311445

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Minimum Qty: 2

Multiplier: 2

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Overview

The Mersen UltraSafe™ S331170 is a 3-pole modular fuse holder designed for 22x58mm fuse links, offering robust protection and enhanced safety for industrial applications. This unit provides an IP20 grade of protection, ensuring finger-safe operation even during fuse changes, which can be performed with a simple flick of the finger. It is rated for 800VAC with a 50kA SCCR and 1000VDC with a 100kA SCCR, accommodating fuses up to 125A. The US223I model features a visual blown fuse indicator for each pole, allowing for quick identification of a tripped fuse. Constructed from durable thermoplastic or thermoset material, it meets stringent safety standards including UL4248, CSA Certified C22.2, and IEC 60269-1 & 60947-3 compliance. The holder is designed for DIN-rail mounting with a unique latching system for easy repositioning and can be field-assembled into multi-pole units using available pin-tie kits. Optional microswitches can be integrated for remote indication of fuse status. Recommended for use with Mersen A70QS and URD 22x58mm fuses, this holder is ideal for protecting circuits in inverters, UPS systems, motor drives, and low voltage distribution systems where IP20 requirements are critical. Its compact footprint and modular design facilitate efficient panel building. The product is proudly distributed by Gross Automation.
  • 3-Pole modular fuse holder for 22x58mm fuses
  • 800VAC / 1000VDC rated with 50kA/100kA SCCR
  • IP20 finger-safe protection, including fuse changing
  • Visual blown fuse indicator for each pole
  • DIN-rail mountable with optional microswitch integration

Specifications

AC Voltage Rating
800 V
Amperage Rating
125 Amps
Application
All circuits up to 750VAC for protection of motors, transformers, low voltage distribution, control circuits Non-load operation
Brand Name
Mersen
Class
IEC Cylindrical 22x58mm
Connection
Pressure Plate
DC Voltage Rating
1000 V
IP Rating
IP20
Material
Thermoplastic / Thermoset
Material
Polyamide
Maximum Operating Temperature
60 C
Minimum Operating Temperature
-25 C
Mounting
DIN rail acc. EN 60715
Number of poles
3
Operating Temperature, Maximum
140 F
Operating Temperature, Minimum
-13 F
Phase
3
Poles
3
Series
UltraSafe™
Size
3.01 x 4.13 x 5.02;76.5 x 105 x 127.5 in;mm
Size
22x58
Special Features
Finger safe Degree of protection: IP20 Optional visual blown fuse indicator & microswitch DIN rail mounting Modular design Lockable Multi-pole assembly kit available Sealable in closed and open position Plastic material UL94V2 mini Flame retardant materials with glow wire flammability index to 960°C
Standard
UL Recognized Component, UL4248, guide IZLT2, file E52283 CSA Certified C22.2, class 6225, file 32169 IEC 60269-2 and IEC 60947-3 RoHS Compliant Plastic material: NF 16101 & 16102 Requirement 2 Compliant
Sub Brand
UltraSafe™
Type
UL/CSA Fuse Holders
Voltage Rating
750 VAC
Voltage Rating
800 VAC / 1000 VDC
Package Dimensions (L x W x H)
3.01 in x 4.13 in x 5.02 in
Package Dimensions (L x W x H)
76.5 mm x 105 mm x 127.5 mm
Package Weight (Imperial)
0.959 lb
Package Weight (Metric)
0.435 kg
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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.