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Overview
- 30A current rating for 14x51mm IEC fuses (MEV55C compatible)
- Tin-plated copper box connectors for copper wires (#4 to #14 AWG)
- Rated for 750VAC and 750VDC applications
- Adder design enables modular multi-pole configurations
- UL Recognized component (File E113357)
Specifications
AC Voltage Rating | 750 V |
Amperage Rating | 30 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 | Copper Box |
Connection Type | Copper Box Connector |
Current Rating | 30A |
DC Voltage Rating | 750 V |
Material | Thermoplastic |
Material | Copper |
Maximum Operating Temperature | 80 C |
Mounting | Direct Screw Mount |
Number Of Poles | 1 |
Phase | 1 |
Poles | 1P |
Size | 3 x 0.97 x 1.37 in |
Size | 76.2 x 24.638 x 34.798 mm |
Size | 14 x 51mm |
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 0.97 in x 1.37 in |
Package Dimensions (L x W x H) | 76.2 mm x 24.638 mm x 34.798 mm |
Package Weight (Imperial) | 0.100 lb |
Package Weight (Metric) | 0.045 kg |
Frequently Asked Questions
What fuse sizes does this block accommodate?
This block is designed for 14 x 51mm IEC cylindrical fuses.
What is the maximum voltage rating?
The fuse block is rated for 750VDC and 750VAC.
What material are the connectors made of?
The connectors are made of tin-plated copper for high conductivity.
What wire sizes are compatible with this fuse block?
The fuse block supports copper wire sizes from #4 to #14 AWG.
Can this fuse block be used in multi-pole configurations?
Yes, the adder design allows modular assembly into multi-pole configurations.
What is the recommended mounting screw size?
Recommended mounting screws are #10 (0.190" diameter).
Is this fuse block suitable for semiconductor applications?
Yes, it is designed for applications requiring robust protection, including semiconductor use.
How to Install the Mersen 70355 Fuse Block
Step-by-step guide to mounting and wiring the 70355 fuse block.
Estimated time: 15m
Tools needed:
Screwdriver, Wire strippers
Supplies needed:
Mounting screws (#10 0.190" dia.), 14 x 51mm IEC fuse
- Prepare the mounting surface
Ensure the mounting surface is clean and flat. Mark and drill holes for #10 mounting screws.
- Mount the fuse block
Secure the fuse block to the surface using #10 mounting screws. Torque to 20 in-lb.
- Connect the wires
Strip wire ends to appropriate length. Insert copper wires (#4-14 AWG) into the copper box connectors and tighten securely.
- Insert the fuse
Place a 14 x 51mm IEC cylindrical fuse into the holder, ensuring proper alignment.
- Verify connections
Check all connections for tightness and proper alignment. Apply power and verify operation.
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.