Littelfuse LFH25030-2P - The new Littelfuse Class H 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

LFH25030-2P

Alternate Item Number: LFH250302P

UPC: 079458181340


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Overview

The **Littelfuse Class H Fuse Block LFH25030-2P** is a high-performance, 2-pole industrial fuse block designed to deliver superior circuit protection in demanding electrical systems. As part of Littelfuse’s latest Class H fuse block generation, this product combines advanced engineering with rugged durability to safeguard critical infrastructure across industrial, commercial, and utility applications. Class H fuse blocks are widely recognized for their robust construction, high interrupting ratings, and compatibility with a broad range of Class H fuses, making them a trusted choice for professionals who prioritize reliability and safety in power distribution systems. **Key Features and Benefits** The LFH25030-2P fuse block is engineered to meet the stringent demands of modern industrial environments. Its **2-pole design** ensures balanced protection for both phase and neutral conductors, reducing the risk of unbalanced loads and potential faults. Unlike generic fuse holders, Class H blocks are built to withstand high fault currents and harsh operating conditions, including vibration, temperature extremes, and corrosive atmospheres. This makes them ideal for applications in manufacturing plants, data centers, renewable energy systems, and heavy machinery where continuous uptime is essential. **Compatibility and Interchangeability** One of the standout advantages of the LFH25030-2P is its **dimensional compatibility** with Class R fuse blocks. While both Class H and Class R blocks share identical form factors, Class R versions incorporate a **rejection feature** that prevents the insertion of incorrect fuse types. This added safety mechanism ensures that only Class R fuses—designed for higher performance and lower let-through energy—can be installed, reducing the risk of misapplication and enhancing system safety. For facilities transitioning from Class H to Class R fuses, the LFH25030-2P provides a seamless upgrade path without requiring changes to panel layouts or mounting hardware. **Industry Applications and Use Cases** The versatility of the LFH25030-2P makes it suitable for a wide range of industrial applications. In **manufacturing**, it protects motors, transformers, and control panels from overloads and short circuits, minimizing downtime and equipment damage. **Data centers** rely on Class H fuse blocks to safeguard sensitive IT infrastructure from power surges and transient faults, ensuring data integrity and system reliability. Renewable energy installations, such as solar and wind farms, use these fuse blocks to protect inverters, battery banks, and distribution panels from fault conditions. Additionally, the LFH25030-2P is commonly deployed in **utility substations, mining operations, and transportation systems**, where robust electrical protection is non-negotiable. **Installation and Maintenance Considerations** Professionals appreciate the **user-friendly design** of the LFH25030-2P, which simplifies installation and maintenance. The fuse block features **screw-type terminals** for secure wire connections, ensuring low contact resistance and long-term reliability. Its **compact footprint** allows for efficient use of panel space, while the **durable thermoplastic housing** resists impact, UV exposure, and chemical degradation. For optimal performance, install the LFH25030-2P in a well-ventilated enclosure to prevent overheating, and always follow manufacturer guidelines for fuse selection and torque specifications. Regular inspections for signs of wear, corrosion, or loose connections will extend the service life of the block and maintain system integrity. **Why Choose Littelfuse?** Littelfuse is a global leader in circuit protection, with over a century of innovation and expertise in fuse technology. The company’s Class H fuse blocks are trusted by engineers and technicians worldwide for their **consistent performance, high interrupting ratings, and adherence to industry standards** such as UL, CSA, and IEC. By choosing the LFH25030-2P, you gain access to Littelfuse’s comprehensive support network, including technical documentation, training resources, and responsive customer service. Whether you’re designing a new system or upgrading an existing one, Littelfuse’s Class H fuse blocks provide the peace of mind that comes from using a proven, high-quality solution backed by a reputable manufacturer. **Conclusion** The **Littelfuse Class H Fuse Block LFH25030-2P** is more than just a component—it’s a critical safeguard for your electrical infrastructure. With its **2-pole design, Class H compatibility, and rejection feature compatibility**, it offers a blend of performance, safety, and flexibility that is unmatched in the industry. Whether you’re protecting a motor control center, a renewable energy system, or a data center, this fuse block delivers the reliability and durability you need to keep your operations running smoothly. Trust Littelfuse to provide the circuit protection solutions that power your success.
  • 2-pole Class H fuse block for balanced circuit protection
  • Dimensional compatibility with Class R blocks (with rejection feature)
  • High interrupting rating for superior fault protection
  • Rugged thermoplastic housing for harsh industrial environments
  • Screw-type terminals for secure, low-resistance connections

Specifications

Brand Name
Littelfuse
Special Features
Universal mounting holes
Standard
UL Listed CSA Recognized
Sub Brand
LF Series Fuseblock
Type
Class H Fuseblock
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

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The new Littelfuse Class H 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.

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The new Littelfuse Class H 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.
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LFG48060-3CDINR

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ACS 600V DISTRIBUTION BLK 950A 1 POLE

LD5704-1

ACS 600V DISTRIBUTION BLK 950A 1 POLE
POWER DISTRIBUTION BLOCK

LD1440-1

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LFG60020-2SQDINR

All Littelfuse Class G fuse blocks offer snap-to-release DIN rail mounting and universal mounting holes. Class G fuse blocks are designed for use with time-delay current limiting Class G fuses.
The LFJ1000 solar fuse block is specifically designed for the Littelfuse SPFJ 1000 Vdc Solar Fuse. It meets UL electrical characteristic requirements and is available in multiple amperages.

LFJ102001C

The LFJ1000 solar fuse block is specifically designed for the Littelfuse SPFJ 1000 Vdc Solar Fuse. It meets UL electrical characteristic requirements and is available in multiple amperages.
The new Littelfuse Class H 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.

LFH256001C

The new Littelfuse Class H 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.
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L60030C-2PQ

Littelfuse DIN series Class CC fuse blocks have integral DIN rail mounting capabilities that allow secure mounting to 35mm "hat" type DIN rails. New releasable mechanism allows installation and removal of block without removing adjacent components on DIN rail. Electrical panel builders and machine builders no longer need to use mounting adapters, saving assembly time and related costs.
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LD3955-2

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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.