Mersen FH50F4 - Fuse Block 1000VAC 1000VDC 800A 1-Pole Stud center to center: 4.21 inch
Mersen

FH50F4

Alternate Item Number: FH50F4

UPC: 782001276959

Contact for Pricing

Overview

The Mersen FH50F4 is a high-current, 1-pole stud-type fuse block engineered for Form 101 fuses in industrial and photovoltaic applications. Rated for 1000VAC and 1000VDC with a continuous current rating of 800A, this fuse block accommodates bolt-in fuses with a center-to-center stud spacing of 4.21 inches (107mm). Constructed from glass-filled polycarbonate or laminated phenolic insulators, the FH50F4 provides robust electrical insulation and mechanical durability. All studs, clips, and mounting hardware are tin or zinc-plated for corrosion resistance and reliable electrical contact. The modular design integrates seamlessly with Mersen's P-Block series, offering compatibility with MF-A and MEV series fuses up to 800A. Ideal for semiconductor protection, photovoltaic systems, and high-power DC applications, this fuse block ensures safe and efficient fuse replacement while maintaining system integrity. Mounting hardware is included for straightforward installation.
  • Rated for 1000VAC and 1000VDC with 800A continuous current
  • 4.21" (107mm) stud spacing for Form 101 fuses
  • Glass-filled polycarbonate or laminated phenolic insulators for durability
  • Tin or zinc-plated hardware for corrosion resistance
  • Compatible with Mersen MF-A and MEV series fuses up to 800A

Specifications

AC Voltage Rating
1000 V
Amperage Rating
800 A
Application
Fuse blocks for semiconductor fuses
Brand Name
Mersen
Connection
Stud
Connection Type
Stud
Current Rating
800A
DC Voltage Rating
1000 V
Material
glass-filled polycarbonate or laminated phenolic
Material
Phenolic
Maximum Operating Temperature
80 C
Mounting
Direct Screw Mount
Mounting Type
Bolt-in
Number Of Poles
1
Phase
1
Poles
1-pole
Series
P-Block
Size
8 x 2.5 x 3 in
Size
203.2 x 63.5 x 76.2 mm
Special Features
Glass-filled polycarbonate or laminated phenolic insulator blocks with studs to accommodate bolt-in fuses
Standard
UL Recognized Component guide IZLT2 File E52283 CSA Certified C22.2, class 6225, File 32169
Type
Semiconductor & Special Purpose Fuse Bases & Accessories
Voltage Rating
1000 VAC
Package Dimensions (L x W x H)
8 in x 2.5 in x 3 in
Package Dimensions (L x W x H)
203.2 mm x 63.5 mm x 76.2 mm
Package Weight (Imperial)
1.850 lb
Package Weight (Metric)
0.839 kg
Fuse Block 1000VAC 1000VDC 600A 1-Pole Stud center to center: 5.089 inch

FH70F3

Fuse Block 1000VAC 1000VDC 600A 1-Pole Stud center to center: 5.089 inch
Littelfuse LSCR Series is a comprehensive line of modular fuse blocks, designed to accommodate a wide range of High-Speed and UL Power Fuses. These LSCR Series blocks have modular stud type design that enables easy mounting in panel boards. LSCR Series blocks are CE Certified and RoHS Compliant. Features and Benefits: Modular design reduces inventory requirements; Sold in pairs for convenience; Supplied with nut and belleville washer; Constructed of molded phenolic (with plated steel studs) provide greater heat dissapation.

LSCR102

Littelfuse LSCR Series is a comprehensive line of modular fuse blocks, designed to accommodate a wide range of High-Speed and UL Power Fuses. These LSCR Series blocks have modular stud type design that enables easy mounting in panel boards. LSCR Series blocks are CE Certified and RoHS Compliant. Features and Benefits: Modular design reduces inventory requirements; Sold in pairs for convenience; Supplied with nut and belleville washer; Constructed of molded phenolic (with plated steel studs) provide greater heat dissapation.
DR4/8 SF DIN2

1SNA110368R1200

DR4/8 SF DIN2

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.