Mersen H331138 Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 2-Pole Visual Indicator…
Alternate Item Number: US142I
UPC: 782001311025
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Overview
- Finger-safe IP20 protection under IEC standards
- 800 VAC / 1000 VDC voltage rating
- Accommodates 14x51mm fuse links
- 2-pole configuration with pressure plate mounting
- Includes visual blown fuse indicator
Specifications
AC Voltage Rating | 800 V |
Amperage Rating | 50 A |
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 14x51mm |
Connection | Pressure Plate |
DC Voltage Rating | 1000 V |
Material | Polyamide |
Maximum Operating Temperature | 60 C |
Minimum Operating Temperature | -25 C |
Mounting | DIN rail acc. EN 60715 |
Number Of Poles | 2 |
Operating Temperature, Maximum | 140 F |
Operating Temperature, Minimum | -13 F |
Phase | 2 |
Size | 3.01 x 2.09 x 4.36;76.5 x 53 x 110.8 in;mm |
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 |
Package Dimensions (L x W x H) | 3.01 in x 2.09 in x 4.36 in |
Package Dimensions (L x W x H) | 76.5 mm x 53 mm x 110.8 mm |
Package Weight (Imperial) | 0.661 lb |
Package Weight (Metric) | 0.300 kg |
K331140
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 2-Pole Visual Indicator Microswitch Pressure Plate IP20
9T58K0000G24
Unclassified Transformrs. Small Core & Cl Tran. 9t58 Ip C&C Kit Xfrmr. Fuse Kits For EncapsulTED Xfmrs. 0000G24
LEYBA
The Littelfuse 600 V in-line watertight fuse holders are the ideal answer for all high humidity and corrosive environments where fuses are required. Available in both breakaway and non-breakaway, single and double pole versions, these fuse holders allow maximum flexibility for any application.
IP20
Terminal Covers (2 Covers Per Kit). Field installed primary and secondary IEC Touch Proof Cover Kit.
Frequently Asked Questions
What is the degree of protection for these fuse holders?
The modular fuse-holders have a degree of protection of IP20.
What are the UL ratings for AC and DC voltage and current?
The UL ratings are 800 VAC at 50 A and 1000 VDC at 50 A, both with a 50 kA rating.
What is the maximum tightening torque for connections?
The maximum tightening torque for connections is 3.5 Nm (30 lbs-in).
What wire sizes can be connected to the fuse holders?
For rigid wire, use 1.5-35mm² (16-3AWG). For stranded wire, use 1.5-25mm² (16-4AWG).
What is the operating temperature range for the fuse holders?
The operating temperature range is from -25°C to 60°C.
What is the storage temperature range for the fuse holders?
The storage temperature range is from -25°C to 80°C.
What type of fuse links are these holders designed for?
These fuse holders are designed for cylindrical fuse links of size 14x51.
Can these fuse holders be locked?
Yes, the fuse holders are lockable.
What is the Short Circuit Current Rating (SCCR) for these fuse holders?
The SCCR for these fuse holders is 100 kA.
What are the available pole configurations for the US14 series?
The US14 series is available in 1, 1+N, 2, 3, 3+N, and 4 poles.
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.