Mersen F227958 - Mersen UltraSafe US14 and US22 modular fuseholders offer the highest levels of safety and features for IEC Cylindrical 14x51mm fuses and 22x58mm. Like all UltraSafe fuseholders, they qualify as "finger safe" to an IP20 grade of protection under IEC standards. These fuseholders come standard with a mechanical indicator that indicates fuse presence. If a fuse with a mechanical striker is used, the fuseholders mechanical indicator will also indicate a blown fuse. Microswitches can be supplied with the fuseholders if desired to allow for remote blown fuse indication. These fuseholders also feature padlocking capabilities. 750 Volts 125 Amps pin tie kit series.
Mersen

F227958

Alternate Item Number: 782001311452

UPC: 782001311452

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Minimum Qty: 10

Multiplier: 10

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Overview

The Mersen UltraSafe US14 and US22 modular fuseholders (SKU: F227958) provide superior safety and functionality for IEC cylindrical 14x51mm and 22x58mm fuses. Designed to meet stringent IEC standards, these fuseholders achieve an IP20 grade of protection, ensuring finger-safe operation, even during fuse changes. The US14 range is rated for 50A, while the US22 range supports up to 125A, both operating at 750VAC/DC with a 200kA SCCR. Key features include a standard mechanical indicator that confirms fuse presence. When paired with a fuse equipped with a mechanical striker, this indicator also signals a blown fuse, enhancing operational visibility. For advanced monitoring, optional microswitches can be integrated to provide remote blown fuse indication, crucial for automated systems and critical infrastructure like inverters, UPS systems, and motor drives. These fuseholders offer robust construction from tough and durable thermoplastic or thermoset materials, with flame retardant properties meeting glow wire flammability index to 960°C. They are designed for easy DIN-rail mounting using a unique latching system, allowing for field repositioning and multi-pole assembly using available pin-tie kits. Padlocking capabilities are integrated for added security, preventing unauthorized access. Compliance with UL4248, UL Recognized Component (IZLT2, File E52283), CSA Certified (C22.2, class 6225, File 32169), and IEC (60269-1, 60947-3) standards underscores their reliability and suitability for a wide range of industrial applications requiring no-load disconnect and IP20 protection.
  • IP20 Finger-Safe Protection for IEC 14x51mm and 22x58mm fuses
  • Rated 750VAC/DC, 125A (US22) / 50A (US14), 200kA SCCR
  • Standard mechanical fuse presence indicator; signals blown fuse with striker fuses
  • Optional microswitches for remote blown fuse indication
  • Padlocking capability for enhanced security and DIN-rail mounting

Specifications

Application
All circuits up to 750V requiring semiconductor fuses for protection of small inverters, UPS systems, motor drives, etc…
Brand Name
Ferraz Shawmut
Class
Accessory
Current Rating
125 A
IP Rating
IP20
Series
UltraSafe US14/US22 Pin Tie Kit Series
Size
14x51mm / 22x58mm
Special Features
Finger-safe Optional blown fuse indicator lights Optional microswitches DIN-rail mount Compact footprint Quick, easy fuse change-outs
Standard
UL Recognized Component to standard 4248-1, File E52283 CSA Certified C22.2, Class 6225, File 32169 IEC Compliant to 60269-2-1, 60947-3
Type
UltraSafe
Voltage Rating
750 VAC
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 22x58 1-Pole Pressure Plate IP20

E331158

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 22x58 1-Pole Pressure Plate IP20
Unclassified Transformrs. Small Core & Cl Tran. 9t58 Ip C&C Kit Xfrmr. Fuse Kits For EncapsulTED Xfmrs. 0000G24

9T58K0000G24

Unclassified Transformrs. Small Core & Cl Tran. 9t58 Ip C&C Kit Xfrmr. Fuse Kits For EncapsulTED Xfmrs. 0000G24
Fuse cover T00 160A

65000020

Fuse cover T00 160A
10x38mm CYLINDRICAL FUSEHOLDER 10 83A. The CYH Series fuse holders are designed to hold cylindrical 10x38, 14x51 and 22x58 mm fuses. The CYH series features a compact IP20 touch-safe design for maximum space savings and safety. Features/Benefits: Compact design IP20 Finger-Safe Design. 35 mm DIN Rail Mountable. Made of a polymer high performance with a fusion temperature more than 300 °C. This provides a safety margin against a possible overheating of the fuse.

CYH10383

10x38mm CYLINDRICAL FUSEHOLDER 10 83A. The CYH Series fuse holders are designed to hold cylindrical 10x38, 14x51 and 22x58 mm fuses. The CYH series features a compact IP20 touch-safe design for maximum space savings and safety. Features/Benefits: Compact design IP20 Finger-Safe Design. 35 mm DIN Rail Mountable. Made of a polymer high performance with a fusion temperature more than 300 °C. This provides a safety margin against a possible overheating of the fuse.
Terminal Covers (2 Covers Per Kit). Field installed primary and secondary IEC Touch Proof Cover Kit.

IP20

Terminal Covers (2 Covers Per Kit). Field installed primary and secondary IEC Touch Proof Cover Kit.
Fuse Holder, 600V Threaded

18880300002

Fuse Holder, 600V Threaded
Control Transformer Accessories - Secondary Fuse Kit 3

SFK3

Control Transformer Accessories - Secondary Fuse Kit 3

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.