Littelfuse 0239.400MXP - 0239 SLO-BLO GLS BODY FUSE M-PACK .400A. 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

0239.400MXP

UPC: 079458909371


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Overview

The Littelfuse 0239 SLO-BLO Glass Cartridge Fuse, SKU 0239.400MXP, represents a critical component for safeguarding sensitive electronic circuits. Engineered with a time-lag characteristic, this 5x20mm fuse is designed to withstand temporary inrush currents without nuisance tripping, while still providing rapid interruption of sustained overcurrents. This precise tripping behavior is essential for protecting delicate components in a wide array of industrial, commercial, and consumer electronics. Manufactured by Littelfuse, a globally recognized leader in circuit protection, the 0239 SLO-BLO series adheres to stringent international safety standards, including UL, CSA, and ANCE 248. This adherence ensures a high level of reliability and performance, making it a trusted choice for engineers and designers. The glass body construction offers excellent visibility of the fuse element, allowing for quick visual inspection, and contributes to its thermal stability during operation. The 0.400 Ampere (0.4A) rating is specifically suited for applications requiring low current protection, where even minor overloads can lead to significant damage. Key features and benefits of the Littelfuse 0239 SLO-BLO fuse include: * **Time-Lag Operation:** Ideal for circuits with moderate inrush currents, preventing premature fuse failure. * **Robust Construction:** A durable glass body ensures reliable performance and easy inspection. * **Broad Compliance:** Meets UL, CSA, and ANCE 248 standards for assured safety and interoperability. * **Environmentally Conscious:** RoHS compliant and lead-free, aligning with modern environmental regulations and sustainability initiatives. * **Precise Current Interruption:** The 0.4A rating offers targeted protection for low-power circuits. This fuse is an integral part of M-Pack offerings, suggesting it is packaged for efficient distribution and use in manufacturing environments. Its 5x20mm form factor is a standard size, ensuring compatibility with a vast range of fuse holders and equipment designs. Applications for the Littelfuse 0239 SLO-BLO fuse are diverse, spanning power supplies, control boards, instrumentation, telecommunications equipment, and various consumer electronics where consistent and reliable circuit protection is paramount. The time-lag feature is particularly valuable in applications involving motors, transformers, or capacitive loads that exhibit temporary current surges upon startup. By selecting the appropriate Littelfuse 0239 SLO-BLO fuse, engineers can significantly enhance the longevity and operational integrity of their electronic designs, mitigating costly downtime and component failures. The commitment to quality and performance from Littelfuse ensures that this fuse will deliver dependable protection throughout the product's lifecycle.
  • Littelfuse 0239 SLO-BLO series time-lag glass cartridge fuse
  • 0.400 Ampere (0.4A) current rating for precise low-current protection
  • Standard 5x20mm fuse body size for broad compatibility
  • Designed to UL/CSA/ANCE 248 standards for reliable circuit protection
  • RoHS compliant and lead-free for environmental responsibility

Specifications

Application
electronic equipment & appliances
Brand Name
Littelfuse
Color
Clear
Current Rating
0.4 A
Material
Glass
Series
239
Size
5x20mm
Special Features
Slo-Blo
Standard
UL/CSA/ANCE 248 Standard
Sub Brand
239 Series
Type
5 x 20 mm UL/CSA Slo-Blo
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9F61 Size B Clips 1.6in

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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.

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.