Littelfuse H239003EP - SLO-BLO GLASS BODY H-PACK 3A 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

H239003EP

Alternate Item Number: 0239003.HXEP

UPC: 079458909777


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Overview

The Littelfuse SLO-BLO H239003EP is a high-performance, time-lag cartridge fuse engineered for robust overcurrent protection in demanding industrial and electronic applications. Designed to meet stringent UL, CSA, and ANCE 248 standards, this 3A fuse offers exceptional reliability and safety. Its 5x20mm glass body construction provides clear visual indication of fuse status and excellent dielectric strength, while the axial lead format facilitates straightforward integration into various circuit designs. The time-lag characteristic of the SLO-BLO series is a critical feature, enabling it to withstand temporary inrush currents and transient surges without nuisance tripping. This makes it an ideal choice for protecting sensitive electronic components, motors, and power supplies where brief, high current events are common during startup or operation. By selectively interrupting fault currents, this fuse safeguards equipment from damage, reduces downtime, and ensures operational continuity. Littelfuse, a globally recognized leader in circuit protection, leverages its extensive expertise to produce fuses that consistently meet and exceed industry expectations. The H239003EP exemplifies this commitment, offering a durable and precise solution for critical protection needs. Its adherence to RoHS compliance and lead-free manufacturing further underscores its suitability for modern, environmentally conscious designs and global market accessibility. Key features and benefits of the Littelfuse SLO-BLO H239003EP include: * **Time-Lag Operation:** Effectively handles inrush currents and transient surges, preventing unnecessary circuit interruptions. * **Broad Compliance:** Designed and tested to UL, CSA, and ANCE 248 standards, ensuring compatibility and safety in diverse regulatory environments. * **Durable Glass Body:** Offers excellent electrical insulation and allows for easy visual inspection of the fuse element. * **Axial Lead Configuration:** Simplifies installation and soldering onto printed circuit boards (PCBs) or within wiring harnesses. * **RoHS Compliant & Lead-Free:** Meets environmental regulations for global distribution and manufacturing. * **3A Current Rating:** Precisely calibrated for applications requiring specific overcurrent protection thresholds. This fuse is an indispensable component in a wide array of applications, including power supplies, industrial control systems, medical equipment, consumer electronics, and telecommunications devices. Engineers and designers rely on the Littelfuse SLO-BLO series for its consistent performance, long service life, and the peace of mind that comes with superior circuit protection. The H239003EP, with its specific 3A rating and time-lag functionality, is a testament to Littelfuse's dedication to providing advanced and dependable protection solutions for the evolving needs of the electronics industry.
  • Littelfuse SLO-BLO H239003EP: 3A, 5x20mm time-lag glass body fuse
  • Designed to UL/CSA/ANCE 248 standards for reliable circuit protection
  • Axial lead format for easy integration into electronic circuits
  • Time-lag characteristic prevents nuisance tripping from transient surges
  • RoHS compliant and lead-free for environmental responsibility

Specifications

Amperage Rating
3 AMPS
Application
protection in appliance or utilization equipment
Brand Name
Littelfuse
Connection Type
Axial Lead
Current Rating
3 A
Material
Glass
Mounting Type
Axial
Series
SLO-BLO
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.

LCC5

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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9F61 Size B Clips 1.6in

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.