Mersen US12PJMP - Mersen UltraSafe modular fuseholders introduce a new level of safety for class CC and midget fuses up to 30 amperes. UltraSafe fuseholders qualify as "finger safe" under IEC and DIN standards to an IP20 grade of protection, including fuse changing (with the flick of a finger). UltraSafe fuseholders are available in 1, 2, 3 or 4 poles, with or without visual blown-fuse indicators in each pole. Multiple poles can be assembled in the field by ordering and installing pin-tie handles. UltraSafe fuseholders save up to 15 percent mounting space and any combination can be snapped onto 35mm DIN rail for extra savings in panel building time. Choose class CC fuses for Type "2" no-damage protection, one of the safest protection packages in the industry. The UltraSafe body material is tough and durable polyamide, with exceptional insulating properties. 12 single unit jumper bar
Mersen

US12PJMP

Alternate Item Number: 782001378073

UPC: 782001378073

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Overview

The Mersen US12PJMP UltraSafe modular fuseholders, SKU US12PJMP, redefine safety and efficiency in industrial electrical systems. Designed for Class CC and midget fuses up to 30 amperes, these fuseholders offer a new standard of protection. They meet stringent IEC and DIN standards, achieving an IP20 grade of protection, ensuring "finger-safe" operation even during fuse changes, which can be performed with a simple flick of a finger. The UltraSafe series is available in 1, 2, 3, or 4 poles, with the option for visual blown-fuse indicators in each pole for enhanced maintenance visibility. Multi-pole configurations can be easily assembled in the field by ordering and installing pin-tie handles, streamlining installation and customization. These fuseholders offer significant space savings, reducing mounting space by up to 15%. Their modular design allows any combination to be snapped onto a standard 35mm DIN rail, leading to substantial savings in panel building time and complexity. When paired with Class CC fuses, the UltraSafe holders provide Type "2" No-Damage protection, representing one of the safest protection packages available in the industry. The body material is constructed from tough and durable polyamide, offering exceptional insulating properties for long-term reliability and safety. Applications include all circuits up to 600 volts for motors, control circuits, and transformers, as well as DC circuits up to 1000VDC, including photovoltaic applications, and non-load disconnect functions. Key specifications include a maximum voltage rating of 600VAC/DC and a maximum current rating of 30A, with a Short Circuit Current Rating (SCCR) of 200kA. The minimum voltage to operate indicator lights is 90VAC or 115VDC, with less than 0.7 mA leakage current at 600V. Approvals include UL Listed to Standard 4248-4 (class CC) and 4248-1 (midget), File E52283, and UL Listed to standard 4248-18 (photovoltaic), File E347822, along with CSA Certified C22.2. Choose the Mersen US12PJMP for robust, safe, and space-efficient fuse protection in critical industrial control panels.
  • IP20 Finger-Safe protection under IEC and DIN standards
  • Accommodates Class CC and midget fuses up to 30A
  • Modular design for 1, 2, 3, or 4 pole configurations
  • Optional visual blown-fuse indicators for each pole
  • 35mm DIN rail mountable for quick and efficient panel building

Specifications

Application
All circuits up to 690V for protection of motors, transformers, low voltage distribution, control circuits, drive protection Non-load operation
Brand Name
Ferraz Shawmut
Current Rating
30 A
IP Rating
IP20
Material
Polyamide
Mounting Type
DIN Rail
Phase
1
Poles
1-4 poles
Series
UltraSafe
Special Features
Finger safe Degree of protection: IP20 Optional visual blown fuse indicator DIN rail mounting Modular design Lockable Multi-pole assembly kit available Sealable in closed and open position Plastic material UL94V2 mini Flame retardant materials with glow wire flammability index to 960°C
Type
UltraSafe
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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.