Littelfuse LFR25030-2P - The new Littelfuse Class H and R blocks offer many advantages over previous generations that are noted in the features and benefits section. Class H and Class R fuse blocks are dimensionally the same, but Class R blocks incorporate a rejection feature, which only allows Class R fuses to be inserted.
Littelfuse

LFR25030-2P

Alternate Item Number: LFR250302P

UPC: 079458181746

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Overview

The Littelfuse Class H and R Fuse Blocks, specifically the LFR25030-2P model, represent a significant advancement in electrical protection for demanding industrial environments. Engineered by Littelfuse, a globally recognized leader in circuit protection, these fuse blocks offer enhanced safety features and robust reliability, ensuring the integrity of critical power systems. The LFR25030-2P is a 2-pole (2P) unit designed to accommodate both Class H and Class R fuses, with a crucial distinction for the Class R variant. While Class H and Class R fuse blocks share identical physical dimensions, the Class R version incorporates an intelligent rejection feature. This design innovation is paramount for preventing accidental misapplication of fuses. It ensures that only fuses specifically rated as Class R can be inserted into a Class R block, thereby eliminating the risk of using an under-rated fuse that could compromise protection levels and lead to equipment damage or safety hazards. This feature is vital in industries where precise fuse coordination and safety standards are non-negotiable. These fuse blocks are indispensable components in a wide array of industrial applications, including: * **Industrial Control Panels:** Safeguarding sensitive control circuitry and automation equipment. * **Power Distribution Systems:** Providing reliable overcurrent protection for feeders and branch circuits. * **Motor Control Centers (MCCs):** Protecting electric motors from short circuits and overloads. * **Machinery and Equipment:** Ensuring the operational continuity and safety of industrial machinery. * **Renewable Energy Systems:** Protecting inverters and other critical components in solar and wind installations. The LFR25030-2P offers backward compatibility, allowing for seamless integration into existing electrical infrastructure while introducing modern safety enhancements. The 2-pole configuration is ideal for single-phase circuits or for providing coordinated protection across two conductors. Littelfuse's commitment to quality manufacturing and rigorous testing ensures that these fuse blocks meet stringent industry standards, providing peace of mind for engineers and maintenance professionals. Selecting the correct fuse block is critical for system reliability and safety. The Littelfuse Class H and R fuse blocks, with their advanced rejection mechanism in the Class R variants, simplify this selection process and enhance overall system security. Professionals rely on Littelfuse for their consistent performance and durable construction, making the LFR25030-2P an excellent choice for critical industrial power applications where failure is not an option. The robust design and adherence to safety protocols make these fuse blocks a cornerstone of effective electrical system design and maintenance.
  • 2-Pole (2P) configuration for versatile circuit protection.
  • Designed for both Class H and Class R fuses, with Class R rejection feature.
  • Class R rejection ensures only Class R fuses can be inserted, enhancing safety.
  • Dimensionally identical to previous generations for backward compatibility.
  • Ideal for industrial control panels, power distribution, and motor control.

Specifications

Brand Name
Littelfuse
Poles
2P
Series
Class H/R
Special Features
Universal mounting holes
Standard
UL Listed and CSA Certified RoHS
Sub Brand
LFR Series
Type
Fuse Block
The Mersen FBC60J30I is an open-style Class J fuse block designed for 600V applications, accommodating fuses from 0-100A. This Generation 2 (Gen2) model offers enhanced features for efficient installation and configuration. It supports multiple connector types, including screw, pressure plate, and box connectors, ensuring compatibility with a wide range of stranded or solid wire. The FBC60J30I is DIN-rail mountable, providing a compact footprint compared to traditional fuse blocks. Its dovetail nesting capability allows for easy field assembly of multipole configurations. When paired with Mersen’s newly designed dead front covers, the fuse bases achieve an IP20 rating for added safety. Manufactured in the US.

FBC60J30I

The Mersen FBC60J30I is an open-style Class J fuse block designed for 600V applications, accommodating fuses from 0-100A. This Generation 2 (Gen2) model offers enhanced features for efficient installation and configuration. It supports multiple connector types, including screw, pressure plate, and box connectors, ensuring compatibility with a wide range of stranded or solid wire. The FBC60J30I is DIN-rail mountable, providing a compact footprint compared to traditional fuse blocks. Its dovetail nesting capability allows for easy field assembly of multipole configurations. When paired with Mersen’s newly designed dead front covers, the fuse bases achieve an IP20 rating for added safety. Manufactured in the US.
600V CLASS J BLOCK 30A 2 POLE NON-ID

LFJ60030-2C

600V CLASS J BLOCK 30A 2 POLE NON-ID
D2 5/8.SFLT ADO.2

1SNA199187R1400

D2 5/8.SFLT ADO.2

Frequently Asked Questions about Littelfuse

What certifications and standards do Littelfuse products comply with?

Littelfuse products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Customers can verify specific product certifications by consulting individual product datasheets on Littelfuse.com, which provide comprehensive details about standards compliance for each component.

What industries and applications are Littelfuse products used for?

Littelfuse products are critical for electrical protection and safety across multiple industrial sectors, including manufacturing, automation, power distribution, and electrical control systems. Their comprehensive product portfolio serves industries that require robust electrical protection, including motor and pump applications, solar installations, programmable logic controllers (PLCs), electrical switch panels, and critical infrastructure environments. Key product lines protect against overcurrent, voltage transients, ground faults, and temperature-related electrical risks, ensuring equipment safety and operational reliability.

What technical support does Littelfuse offer?

Littelfuse offers comprehensive technical support through multiple channels. Their Technical Hotline (800-TEC-FUSE) provides direct access to engineers who can help identify issues and recommend solutions. Additionally, Littelfuse offers extensive online Technical Resources at Littelfuse.com, including datasheets, product manuals, whitepapers, application guides, and online design tools. Their experienced product and application engineers also provide step-by-step support from design to installation.

What are the main product lines offered by Littelfuse?

Littelfuse offers comprehensive industrial protection and control product lines, including fuses, fuse holders, protection relays, temperature sensors, and electrical safety components. Their key product categories span surge protective devices, custom OEM products, electrical switch panels, medium voltage fuses, ground-fault protection relays, motor and pump protection devices, and temperature sensors. These products are designed to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from electrical faults.

What are the key features of Littelfuse products?

Littelfuse products feature exceptional circuit protection technologies with key characteristics including UL/IEC safety standard compliance, low internal resistance, and advanced protective capabilities across multiple product lines. Their components provide critical protection for industrial systems, offering features like overcurrent protection, voltage transient suppression, and resettable protection devices with ultra-low resistance and compact designs. Key product lines include fuses, metal oxide varistors (MOVs), TVS diodes, PolySwitch devices, and specialized electronic protection components that enhance system reliability and safety.

What environmental ratings do Littelfuse products have?

Littelfuse products feature comprehensive environmental ratings, including NEMA Type 1, 2, 3, 3R, 4/4X, 12, and 13 certifications, as well as IP65 protection. These ratings ensure superior protection in diverse industrial environments, with an operating temperature range of -40°F to +131°F (-40°C to +55°C). Many products also include UV-stabilized materials and neoprene gaskets for enhanced durability in outdoor and challenging conditions.

What accessories are available for Littelfuse products?

Littelfuse offers several key accessories across their product lines, including fuse holders, voltage monitoring modules, and terminal connectors. Specific accessories include the LPSM003ZXID (indicating) and LPSM003Z (non-indicating) POWR-SAFE Dead Front fuse holders for Class CC and Midget-Style fuses, the VRM6048 voltage monitor accessory module, and female quick connect terminals (P1015 series) in various wire gauge sizes. These accessories are designed to enhance protection, monitoring, and connectivity for Littelfuse electrical components.

What is Littelfuse's warranty policy?

Littelfuse provides comprehensive warranty details on their official website at www.littelfuse.com/warranty. Customers should visit this page to review the specific warranty terms and conditions for their specific product lines. For direct warranty support or questions, customers can contact Littelfuse Technical Support at 1-800-TEC-FUSE or email [email protected].

What communication protocols do Littelfuse products support?

Littelfuse supports a comprehensive range of industrial communication protocols, including PROFIBUS, PROFINET, EtherNet/IP, DeviceNet, Modbus RTU, and CANopen. Our products provide flexible connectivity solutions across multiple industrial automation platforms, enabling seamless integration with various control systems and network architectures.

How are Littelfuse products typically installed?

Littelfuse products are typically installed using specialized mounting hardware like fuse holders, blocks, and panels designed for specific industrial applications. The POWR-SAFE Dead Front holders, for example, provide optimum protection for Class CC and Midget-Style fuses, supporting installations up to 600 VAC/DC. Installation often involves using precision terminals with strain relief, such as 0.25 in. female quick connect terminals, to ensure secure and safe electrical connections in industrial control systems.