Mersen 34033T Fuse Block 300VAC 300VDC Class T 400A 3-Pole Box with Reinforced Clip
Alternate Item Number: 34033T
UPC: 782001675394
Documents & Media
Contact for Pricing
Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.
Overview
- Rated for 300VAC/300VDC and 400A continuous current
- Phenolic insulator with dielectric strength >2500V
- Reinforced copper clips for high conductivity and durability
- Supports wire ranges from 600 kcmil to #2
- UL 4248 listed and CSA certified for safety compliance
Specifications
AC Voltage Rating | 300 V |
Amperage Rating | 400 A |
Brand Name | Mersen |
Class | Class T |
Connection | Box with Reinforced Clip |
DC Voltage Rating | 300 V |
Material | Phenolic |
Maximum Operating Temperature | 80 C |
Maximum Operating Temperature | 80 °C |
Mounting | Direct Screw Mount |
Number Of Poles | 3-pole |
Number of Poles | 3 |
Phase | 3 |
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 |
Frequently Asked Questions
What types of fuses are compatible with Mersen Class T fuse blocks?
Mersen Class T fuse blocks accommodate Class T fuses up to 600A. For 300V blocks, use A3T fuses, and for 600V blocks, use A6T fuses.
What are the voltage and amperage ratings for these fuse blocks?
The fuse blocks are rated for 300VAC/DC and 600VAC/DC. Available amperage ratings include 30A, 60A, 100A, 200A, 400A, and 600A.
What is the SCCR rating for Mersen Class T fuse blocks?
The Short Circuit Current Rating (SCCR) for these fuse blocks is 200kA.
What materials are the insulators made from and what is their dielectric strength?
Insulators are made from durable, glass-filled polycarbonate (GFPC) or phenolic, with dielectric strength exceeding 2500V.
Are Mersen Class T fuse blocks suitable for copper and aluminum wires?
Fuse blocks with copper box connectors are for copper wires only. Some models accommodate both aluminum and copper (Al/Cu) wires.
What are the recommended wire ranges for 30A fuse blocks?
For 30A fuse blocks, the wire range is #2-14 for Al/Cu box connectors and #10-14 for Cu screw or pressure plate connectors.
What are the recommended wire ranges for 100A fuse blocks?
For 100A fuse blocks, the wire range is 2/0-#12 for Al/Cu box connectors and 2/0-#12 for Cu box connectors.
What are the recommended wire ranges for 400A fuse blocks?
For 400A fuse blocks, the wire range is 600 kcmil-#2 for Al/Cu box connectors and 600 kcmil-#2 for Cu box connectors.
What are the connector torque specifications for 30A fuse blocks?
Connector torque for 30A fuse blocks is 35 In-lbs for box connectors and 20 In-lbs for screw or pressure plate connectors.
What are the connector torque specifications for 100A fuse blocks?
Connector torque for 100A fuse blocks is 50 In-lbs for Cu box connectors and 120 In-lbs for Al/Cu box connectors.
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.