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Overview
- 3-Pole Class T Fuse Block
- 400A Current Rating
- 300VAC/300VDC Voltage Rating
- Copper Box Connectors for superior heat cycling
- Phenolic Insulators with >2500V dielectric strength
Specifications
AC Voltage Rating | 300 V |
Amperage Rating | 400 A |
Brand Name | Mersen |
Class | Class T |
Connection | Copper Box |
Connection Type | Copper Connectors |
Current Rating | 400 A |
DC Voltage Rating | 300 V |
Material | Phenolic |
Material | Copper / Glass-filled Polycarbonate (GFPC) / Phenolic |
Maximum Operating Temperature | 80 C |
Mounting | Direct Screw Mount |
Number Of Poles | 3-pole |
Number of Poles | 3 |
Phase | 3 |
Poles | 3 |
Series | Class T |
Size | 6 x 6.5 x 2.99 in |
Size | 152.4 x 165.1 x 75.946 mm |
Special Features | Unique integral DIN-rail adapters for 600V, 30 & 60A blocks Full barrier design (30 & 60A) increases pole to pole safety Unique adder-block design (30 & 60A) for design flexibility Spring reinforcing standard for all 30 & 60A clips Features high conductivity copper alloy fuse clips Cool running high amperage (100 - 600A) connectors Copper connectors available 30 - 600A |
Standard | All fuse blocks meet the requirements of UL 4248 UL listed, guide IZLT, File E52283 UL recognized component guide IZLT2, file E52283 CSA certified class 6225, File 32169 |
Type | UL/CSA Fuse Bases |
Voltage Rating | 300 VAC |
Package Dimensions (L x W x H) | 6 in x 6.5 in x 2.99 in |
Package Dimensions (L x W x H) | 152.4 mm x 165.1 mm x 75.946 mm |
Package Weight (Imperial) | 4.500 lb |
Package Weight (Metric) | 2.041 kg |
LFH25030-1S
The new Littelfuse Class H blocks offer many advantages over previous generations that are noted in the features and benefits section. Class H and Class R fuse blocks are dimensionally the same, but Class R blocks incorporate a rejection feature, which only allows Class R fuses to be inserted.
Frequently Asked Questions
What is the voltage rating for the Mersen 34053T fuse block?
The Mersen 34053T fuse block is rated for 300VAC and 300VDC.
What type of connectors does the Mersen 34053T use?
The Mersen 34053T features copper box connectors, designed for copper wires only and optimized for heat cycling.
What is the amperage rating of the Mersen 34053T fuse block?
The Mersen 34053T fuse block has a current rating of 400A.
What fuse class is compatible with the Mersen 34053T?
The Mersen 34053T is a Class T fuse block and accommodates Class T fuses up to 600A.
What are the insulation specifications for this fuse block?
The Mersen 34053T uses phenolic insulators with a dielectric strength exceeding 2500V.
What wire range is supported by the copper box connectors?
The copper box connectors on the Mersen 34053T support a wire range of 600 kcmil-#2.
What mounting screws are recommended for the Mersen 34053T?
For the Mersen 34053T, 1/4" screws are recommended for base mounting.
How to Install the Mersen 34053T Fuse Block
Step-by-step guide for mounting the Mersen 34053T fuse block.
Estimated time: 15m
Tools needed:
Screwdriver, Torque wrench (recommended)
Supplies needed:
1/4" mounting screws, Appropriate Class T fuses
- Prepare Mounting Location
Ensure the mounting surface is clean and suitable for securing the fuse block. Identify the correct 1/4" mounting screws.
- Mount the Fuse Block
Position the Mersen 34053T fuse block onto the mounting surface. Secure it using the 1/4" screws through the designated mounting holes. Ensure the block is firmly attached.
- Connect Wiring
Insert copper wires into the copper box connectors according to the specified wire range (600 kcmil-#2). Ensure proper torque is applied to the connector screws for a secure connection. Consult the catalog for specific torque values if available.
- Install Fuses
Insert the appropriate Class T fuses (up to 600A) into the fuse block slots. Ensure the fuses are securely seated using the side-clip connectors.
- Verify Installation
Double-check all connections for tightness and ensure the fuse block is securely mounted. Confirm that all safety precautions have been followed.
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.