
Contact for Pricing
Overview
- 400A, 3-pole NH-vertical fuse rail for 690VAC systems
- Designed for 185mm bus bar systems with M12 screw cable termination
- IP20 touch protection for enhanced safety during installation/maintenance
- Compliant with IEC/EN 60269-2 and VDE 0636-2 standards
- Modular design supports custom configurations and easy installation
Specifications
AC Voltage Rating | 690 V |
Amperage Rating | 400 A |
Application | Feeder pillarsCable distribution cabinetsLow voltage distribution units |
Brand Name | Mersen |
Connection | Screw |
Connection Type | Screw - M12 bolts |
Current Rating | 400A |
IP Rating | IP20 |
Mounting | Bus bar system 185 mm |
Mounting Type | Bus bar system |
Number of poles | 3 |
Poles | 3-pole |
Series | BSL |
Size | 4.84 x 3.86 x 21.97;122.936 x 98.044 x 558.038 in;mm |
Size | NH2 |
Special Features | Installation on to 185 mm bus bar systemDimensions of bus bars and cable terminal connections are equivalent to those of MULTIVERT® |
Standard | IEC 60 269-1, IEC 60 269-2For NH-fuse links size 1, 2, 3 in accordance with IEC/EN 60 269-2, VDE 0636-2 |
Type | IEC NH Fuse Rails |
Voltage Rating | 690VAC |
Package Dimensions (L x W x H) | 4.84 in x 3.86 in x 21.97 in |
Package Dimensions (L x W x H) | 122.936 mm x 98.044 mm x 558.038 mm |
Package Weight (Imperial) | 8.378 lb |
Package Weight (Metric) | 3.800 kg |

X1023428
NH-vertical fuse rail BSL Size NH1 690VAC 250A 3-Pole Bus bar system 185 mm With cable connection Screw - M10 insert nut
9T58K0000G24
Unclassified Transformrs. Small Core & Cl Tran. 9t58 Ip C&C Kit Xfrmr. Fuse Kits For EncapsulTED Xfmrs. 0000G24
IP20
Terminal Covers (2 Covers Per Kit). Field installed primary and secondary IEC Touch Proof Cover Kit.
CYH14511
The CYH Series fuse holders are designed to hold cylindrical 10x38, 14x51 and 22x58 mm fuses. The CYH series features a compact IP20 touch-safe design for maximum space savings and safety.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.


