Mersen US101IHEL - The Innovative and comprehensive UltraSafe range of Mersen fuse-holders. Modular fuse-holders are finger-safe under IEC standards to an IP20 grade of protection, including fuse changing (with the flick of a finger). Modular fuse-holders are available in 1, 2, 3 or 4 poles, with or without visual blown fuse indicators, in UL + IEC version. Multi-pole units can also be field assembled by ordering pin-ties assembly kit. , UltraSafe range is made of tough and durable thermoplastic or thermoset material. For 10x38 PV fuses with indicator
Mersen

US101IHEL

Alternate Item Number: 3605340490381

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Minimum Qty: 12

Multiplier: 12

*Contact for lower quantities*

Overview

The Mersen UltraSafe US101IHEL modular fuse-holder is a finger-safe, IP20-rated solution designed for 10x38 PV fuses in industrial and photovoltaic applications. Engineered with durable thermoplastic or thermoset materials, this fuse-holder delivers reliable electrical protection in demanding environments. Compatible with UL and IEC standards, it supports 1 to 4 poles with optional visual blown fuse indicators for enhanced maintenance efficiency. Multi-pole units can be field-assembled using a pin-ties assembly kit, providing flexibility for custom configurations. The IP20 rating ensures finger-safe operation during fuse changes, meeting stringent safety requirements. Ideal for solar installations, UPS systems, motor drives, and other high-voltage circuits up to 750V AC/DC, the US101IHEL combines robust construction with user-friendly design. Its modular architecture allows for scalable solutions, while the flame-retardant materials ensure compliance with UL94V2 mini and glow wire flammability index up to 960°C. The fuse-holder is designed for DIN rail mounting and direct board mounting, offering versatile installation options. With a maximum current rating of 50A (for 14x51mm fuses) and 125A (for 22x58mm fuses), this product is optimized for high-speed fuse protection in critical applications.
  • Finger-safe IP20-rated fuse-holder for 10x38 PV fuses
  • Available in 1, 2, 3, or 4 poles with optional blown fuse indicators
  • Modular design allows field assembly of multi-pole units with pin-ties kit
  • UL and IEC compliant, compatible with 750V AC/DC circuits
  • Durable thermoplastic/thermoset material with flame-retardant properties (UL94V2 mini, 960°C glow wire index)

Specifications

Application
Photovoltaic
Brand Name
Ferraz Shawmut
Connection
Pressure Plate
IP Rating
IP20
Material
thermoplastic or thermoset
Mounting
DIN-rail
Phase
1
Poles
1-4 poles
Series
UltraSafe
Size
10x38
Special Features
Finger safe Degree of protection: IP20 Optional visual blown fuse indicator 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 to standard 4248-14, File E52283 CSA Certified C22.2, Class 6225, File 32169 IEC Compliant to 60269-2-1, 60947-3
Type
UltraSafe
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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.