Littelfuse LFR25030-3C - 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

LFR25030-3C

Alternate Item Number: LFR250303C

UPC: 079458181722


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Overview

The Littelfuse Class H and Class R fuse blocks, identified by SKU LFR25030-3C, represent a significant advancement in overcurrent protection technology for demanding industrial environments. Engineered by Littelfuse, a globally recognized leader in circuit protection, these fuse blocks offer enhanced safety, operational reliability, and user-friendly installation, making them an indispensable component in a wide array of electrical systems. These fuse blocks are designed to house and protect Class H and Class R fuses, crucial for safeguarding electrical equipment from damaging overloads and short circuits. A key differentiator between the Class H and Class R variants, despite being dimensionally identical for seamless integration, is the advanced rejection feature incorporated into the Class R blocks. This intelligent design ensures that only compatible Class R fuses can be inserted, effectively preventing the installation of incorrect fuse types. This critical safety measure significantly reduces the risk of installation errors, which can lead to equipment damage, system downtime, and potential safety hazards. By enforcing proper fuse selection, Littelfuse enhances the overall integrity and safety of electrical installations. The benefits of utilizing Littelfuse Class H and R fuse blocks extend to their robust construction and adherence to stringent industry safety standards. They are built to withstand the rigors of industrial settings, providing long-lasting performance and dependable protection. The straightforward design facilitates easy installation and maintenance, minimizing labor costs and ensuring quick integration into existing or new control panels and power distribution systems. Key features and benefits include: * **Enhanced Safety:** Rejection feature in Class R blocks prevents incorrect fuse insertion. * **Dimensional Compatibility:** Class H and R blocks share the same footprint for easy retrofitting and design flexibility. * **Reliable Overcurrent Protection:** Designed to work with high-quality Class H and Class R fuses for superior circuit protection. * **Durable Construction:** Built to withstand harsh industrial conditions, ensuring longevity and consistent performance. * **Ease of Installation & Maintenance:** Streamlined design simplifies integration and servicing. These fuse blocks are ideally suited for a broad spectrum of industrial applications, including but not limited to: * Industrial control panels * Motor control centers (MCCs) * Power distribution systems * Machinery protection in manufacturing plants * HVAC systems * Renewable energy installations By choosing Littelfuse, you are investing in a legacy of innovation and quality. The LFR25030-3C fuse block exemplifies this commitment, offering peace of mind through superior protection, reduced installation risks, and dependable operation. Ensure the safety and efficiency of your electrical infrastructure with Littelfuse's trusted circuit protection solutions.
  • Enhanced safety with Class R fuse rejection feature
  • Dimensionally identical Class H and Class R blocks
  • Robust construction for demanding industrial environments
  • Facilitates easy installation and maintenance
  • Trusted Littelfuse quality for reliable overcurrent protection

Specifications

Brand Name
Littelfuse
Special Features
Universal mounting holes
Standard
UL Listed and CSA Certified RoHS
Sub Brand
LFR Series
Type
Fuse Block
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
BB18 is a three-phase busbar terminal power feed lug, which is intended for use with LPSM/LPSC series fuse holders. See datasheet for more detailed specifications.

BB18

BB18 is a three-phase busbar terminal power feed lug, which is intended for use with LPSM/LPSC series fuse holders. See datasheet for more detailed specifications.
D4/8.SFT2.I.ADO

1SNA399777R1200

D4/8.SFT2.I.ADO
2000W 5V 150A 24V 10A 2-12V 1P

SH20-P3T53J4

2000W 5V 150A 24V 10A 2-12V 1P

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.