Mersen U70506 - Fuse Block 750VAC 750VDC 50A 1-Pole Box
Mersen

U70506

Alternate Item Number: U70506

UPC: 782001323585


Documents & Media
Line Drawing

Contact for Pricing

Overview

The Mersen U70506 is a single-pole fuse block designed for 14x51mm IEC cylindrical fuses. It is rated for 750VAC and 750VDC at 50A, with a Short Circuit Current Rating (SCCR) of 200kA, dependent on the fuse's interrupting rating. This open-face block features box connectors suitable for copper or aluminum/copper wire, accommodating sizes #2-14 AWG. The recommended connector torque is 35 in-lbs. Manufactured in the USA, the U70506 is part of Mersen's U705 series, which allows for multi-pole configurations when combined with other adder blocks. It is suitable for high-speed fuse applications in systems such as small inverters, UPS, and motor drives. SKU: U70506.
  • Rated for 750VAC and 750VDC at 50A
  • Accommodates 14x51mm IEC cylindrical fuses
  • Single-pole configuration
  • Box connectors for #2-14 AWG Al/Cu wire
  • 200kA SCCR (dependent on fuse IR)

Specifications

AC Voltage Rating
750 V
Amperage Rating
50 A
Application
All circuits up to 750 volts using semiconductor fuses for protection of small inverters, UPS systems, motor drives, etc.
Brand Name
Mersen
Class
IEC Cylindrical 14x51mm
Connection
Box
Connection Type
Box, screw, or pressure plate connectors
Current Rating
50 A
DC Voltage Rating
750 V
Material
Thermoplastic
Material
Tin-Plated Copper
Maximum Operating Temperature
80 C
Mounting
Screw Mount or DIN Rail
Mounting Type
DIN-rail adapter (U710)
Number Of Poles
1
Phase
1
Poles
1-pole
Series
U705/U710
Size
3 x 1.06 x 1.37 in
Size
76.2 x 26.924 x 34.798 mm
Size
14 x 51mm or 22 x 58mm
Special Features
Thermoplastic bases DIN-rail (U710) or Screw Mount Adder block design
Standard
UL Recognized component guide IZLT2, File E52283 CSA Certified class 6225, File 32169
Type
Semiconductor & Special Purpose Fuse Bases & Accessories
Voltage Rating
750 VAC
Package Dimensions (L x W x H)
3 in x 1.06 in x 1.37 in
Package Dimensions (L x W x H)
76.2 mm x 26.924 mm x 34.798 mm
Package Weight (Imperial)
0.140 lb
Package Weight (Metric)
0.064 kg
Fuse Block 750VAC 750VDC 30A 1-Pole Screw with Reinforced Clip

70316

Fuse Block 750VAC 750VDC 30A 1-Pole Screw with Reinforced Clip
1PH15P25MM is a compact-sized POWR Busbar system that provides safe distribution of electrical power to multiple dead front fuse holders and measures 272 mm in length, which can be cut down to an optimal size. See datasheet for more detailed specifications.

1PH15P25MM

1PH15P25MM is a compact-sized POWR Busbar system that provides safe distribution of electrical power to multiple dead front fuse holders and measures 272 mm in length, which can be cut down to an optimal size. See datasheet for more detailed specifications.
D2.5/8SFT ADO

1SNA199184R1100

D2.5/8SFT ADO

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.