Littelfuse H239.500EP - SLO-BLO GLASS BODY H-PACK .500A AXIAL. 5x20mm time-Lag glass body cartridge fuse designed to JL specification. Features: Designed to UL/CSA/ANCE 248 Standard. Available in cartridge and axial lead format RoHS compliant and lead-free.
Littelfuse

H239.500EP

Alternate Item Number: 0239.500HXEP

UPC: 079458909418


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Overview

The Littelfuse H239.500EP SLO-BLO GLASS BODY H-PACK fuse represents a critical component for reliable overcurrent protection in a wide array of industrial and electronic applications. Engineered to stringent UL/CSA/ANCE 248 standards, this 0.5A, time-lag, glass body cartridge fuse offers dependable performance where circuit integrity is paramount. Its compact 5x20mm dimensions and axial lead format facilitate straightforward integration into diverse equipment designs, from power supplies and control panels to sensitive instrumentation and consumer electronics. The SLO-BLO series from Littelfuse is synonymous with robust circuit protection. This specific model, SKU H239.500EP, is designed to absorb temporary, harmless inrushes of current without nuisance tripping, while swiftly interrupting dangerous overcurrent conditions that could lead to equipment damage or safety hazards. The time-lag characteristic is essential for applications that experience brief, high current demands during startup or operation, ensuring uninterrupted functionality under normal operating parameters. Key features and benefits of the Littelfuse H239.500EP include: * **High-Quality Construction:** Featuring a durable glass body for visual inspection and robust internal components for consistent performance. * **Time-Lag Operation:** Specifically designed to tolerate temporary current surges, preventing unnecessary circuit interruptions. * **Broad Compliance:** Meets rigorous UL, CSA, and ANCE 248 standards, ensuring suitability for demanding applications and international markets. * **Compact Form Factor:** The 5x20mm size and axial lead configuration make it versatile for PCB mounting and integration into space-constrained designs. * **Environmental Responsibility:** RoHS compliant and lead-free, aligning with modern environmental regulations and sustainability initiatives. Littelfuse has established itself as a global leader in circuit protection, and the SLO-BLO series exemplifies their commitment to quality and reliability. Professionals across industries, including telecommunications, industrial automation, medical devices, and consumer electronics, rely on Littelfuse fuses for their critical protection needs. The H239.500EP is an excellent choice for designers and engineers seeking a fuse that balances performance, compliance, and environmental consciousness. Its consistent interrupting capacity and precise tripping characteristics contribute to the overall safety and longevity of the protected equipment, minimizing downtime and costly repairs. When selecting fuses for critical systems, the Littelfuse SLO-BLO H-PACK offers peace of mind through proven performance and adherence to international safety benchmarks.
  • Littelfuse SLO-BLO GLASS BODY H-PACK fuse
  • 0.5A current rating, time-lag operation
  • 5x20mm glass body cartridge, axial leads
  • Designed to UL/CSA/ANCE 248 standards
  • RoHS compliant and lead-free

Specifications

Amperage Rating
.500 Amps
Application
protection in appliance or utilization equipment
Brand Name
Littelfuse
Connection Type
Axial Lead / Cartridge
Current Rating
0.5 A
Material
Glass
Series
H-PACK
Size
5x20mm
Special Features
Time-Delay
Standard
UL/CSA/ANCE 248
Sub Brand
239 Series
Type
Slo Blo
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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.