Mersen D70QS150-4 - DC Round Body Fuse 700VDC UL 150A Max. Bolted
Mersen

D70QS150-4

Alternate Item Number: D70QS150-4

UPC: 782001508975


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Overview

The Mersen D70QS150-4 is a North American-style, round-body, high-speed DC fuse designed for high-power conversion applications in rapidly electrifying industries. Rated at 700 VDC and 150A maximum, this bolted fuse meets UL standards for DC fault protection in demanding environments. Engineered to safeguard critical components such as battery charging systems, relays, and contactors, the D70QS series reduces I²t, peak let-through current, and arc voltages during fault conditions, minimizing stress on downstream equipment. Its robust design ensures reliable performance in construction, marine, agriculture, manufacturing, mining, and transportation applications where DC fault protection is essential. The fuse is manufactured in Mexico and carries a UNSPSC code of 39121606, ensuring traceability and compliance with industry standards.
  • 700 VDC voltage rating for high-power DC applications
  • 150A maximum current rating with bolted connection type
  • Reduces I²t, peak let-through current, and arc voltages during faults
  • Compatible with battery charging systems, relays, and contactors
  • Manufactured in Mexico under UL standards

Specifications

Amperage Rating
150 A
Application
High Power battery charging and management systems protection Energy Storage Systems (ESS) Electrical Energy Storage (EES) Battery Disconnect Unit (BDU) Battery pack protection DC Fast-Charging station for EV applications Backup protection for DC relay/disconnector/switch Protection of 700VDC or less, UPS and inverters
Body Material
GMG
Brand Name
Mersen
Connection
Blade
Connection Material
Tin-Plated Brass
Connection Type
Bolted
Current Rating
150A
Current Rating
150 A
DC Voltage Rating
700 V
Mounting
Bolted
Series
D70QS
Size
3.63 x 1.22 in
Size
92.202 x 30.988 mm
Special Features
Lower I²t performance for improved protection of equipment Superior cycling ability for long, reliable life on high cyclic loading Low watts losses Built to withstand vibration High Interrupting rating for optimal short circuit protection
Special Features
Lower I²t performance for improved protection of equipment Superior cycling ability for long, reliable life on high cyclic loading Low watts losses High Interrupting rating for optimal short circuit protection
Standard
UL Recognized: UL File: E60314 DC: 50-600A, 700VDC REACH/RoHS compliant
Standard
UL Recognized: UL File: E60314 DC: 50-600A, 700VDC Power Cycling & Vibration REACH/RoHS compliant
Type
Round Body High-Speed Fuse-Links DC Protection
Voltage Rating
700 VDC
Voltage Rating
700VDC
Package Dimensions (L x W x H)
3.63 in x 1.22 in x 1.22 in
Package Dimensions (L x W x H)
92.202 mm x 30.988 mm x 30.988 mm
Package Weight (Imperial)
0.410 lb
Package Weight (Metric)
0.186 kg
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D70QS300-4

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D100QS200-4

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DC Round Body Fuse 1000VDC UL 250A Max.Bolted

D100QS250-4

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DC Round Body Fuse 1000VDC UL 175A Max.Bolted

D100QS175-4

DC Round Body Fuse 1000VDC UL 175A Max.Bolted
DC Round Body Fuse 1000VDC UL 300A Max.Bolted

D100QS300-4

DC Round Body Fuse 1000VDC UL 300A Max.Bolted

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.