Mersen X227927 - 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 50 Amps pin tie kit series.
Mersen

X227927

Alternate Item Number: 782001311148

UPC: 782001311148

Contact for Pricing

Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

Overview

Mersen UltraSafe US14 and US22 modular fuseholders (SKU: X227927) deliver unmatched safety and functionality for IEC cylindrical 14x51mm and 22x58mm fuses in industrial electrical systems. These fuseholders are rated for 750V AC/DC and 50A (US14) or 125A (US22) with a Short Circuit Current Rating (SCCR) of 200kA, ensuring robust protection in high-performance applications. Designed to meet IP20 finger-safe standards per IEC 60947-3, the US14/US22 series provides operator safety during fuse replacement via a one-finger operation. Each unit includes a mechanical indicator to confirm fuse presence, and when paired with a striker fuse, it automatically signals a blown fuse. Optional microswitches enable remote blown fuse indication for enhanced monitoring in control systems. The modular design supports 1, 2, 3, or 4 poles, with configurations available with or without visual blown-fuse indicators. Multi-pole assemblies can be field-configured using pin-tie kits for flexible system integration. DIN-rail mounting with a unique latching system allows repositioning without tools, while padlocking capabilities ensure secure access control. Constructed from UL94V-2 flame-retardant thermoplastic with a glow-wire flammability index of 960°C, these fuseholders are built for durability in harsh environments. Ideal for protecting semiconductor fuses in small inverters, UPS systems, motor drives, and other high-voltage circuits up to 750V, the US14/US22 series is UL Recognized (File E52283), CSA Certified (Class 6225), and IEC 60269-1 compliant. Compatible fuse types include A70QS, A70P, URC, and URD for US14; A70QS and URD for US22. Distributed by Gross Automation for seamless procurement and technical support.
  • IP20 finger-safe protection per IEC 60947-3 for safe fuse replacement
  • 750V AC/DC rating with 50A (US14) or 125A (US22) current capacity and 200kA SCCR
  • Mechanical indicator for fuse presence; striker fuse compatibility for blown fuse signaling
  • Optional microswitches for remote blown fuse indication and padlocking for security
  • Modular 1-4 pole designs with DIN-rail mounting and field-assemblable pin-tie kits

Specifications

Amperage Rating
50 A
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
50 A
Family Code
151
Family Description
UltraSafe Holders
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 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch 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
Modular fuse holder 1P 600V with LED

57050011

Modular fuse holder 1P 600V with LED
10x38mm CYLINDRICAL FUSEHOLDER 81A ID. 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.

CYH10381ID

10x38mm CYLINDRICAL FUSEHOLDER 81A ID. 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.
Control Transformer Accessories - Secondary Fuse Kit 3

SFK3

Control Transformer Accessories - Secondary Fuse Kit 3
Fuse Holder GPM-B 600V CC

18813000026

Fuse Holder GPM-B 600V CC

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.