Littelfuse 0239.250MXEP - SLO-BLO GLASS BODY M-PACK .250A 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

0239.250MXEP

UPC: 079458909302


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Minimum Qty: 1000

Multiplier: 1000

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Overview

The **Littelfuse 0239.250MXEP 0.250A 5x20mm Slo-Blo Glass Axial Lead Cartridge Fuse** is a high-performance, time-lag protection solution engineered for sensitive electronic circuits where controlled current interruption is critical. Designed to meet the rigorous **UL/CSA/ANCE 248 Standard**, this RoHS-compliant and lead-free fuse delivers exceptional reliability in industrial, automotive, and electronic applications. Its **precision time-lag characteristic** ensures optimal performance by allowing brief current surges—common in startup or transient conditions—while providing robust overcurrent protection to prevent damage to downstream components. **Key Features & Benefits:** - **Time-Lag Design:** The Slo-Blo technology allows temporary overloads (e.g., motor startup or capacitor inrush) without nuisance tripping, making it ideal for applications with intermittent high-current events. - **Glass Body Construction:** The durable glass body offers excellent visibility for visual inspection of the fuse element, while providing superior arc suppression and heat dissipation compared to plastic alternatives. - **Axial Lead Configuration:** The 5x20mm axial lead design simplifies installation in printed circuit boards (PCBs) and chassis-mounted applications, ensuring secure electrical contact and mechanical stability. - **Compliance & Safety:** Certified to **UL/CSA/ANCE 248**, this fuse meets global safety standards for overcurrent protection. Its **RoHS compliance** and lead-free construction align with modern environmental regulations, reducing hazardous material risks in sensitive environments. - **Versatile Applications:** Suitable for a wide range of industries, including **industrial control panels, power supplies, automotive electronics, telecommunications equipment, and consumer appliances**, where precise current limiting is essential. **Why Choose Littelfuse?** Littelfuse is a globally recognized leader in circuit protection, with over a century of innovation in fuse technology. The **0239.250MXEP** exemplifies the company’s commitment to quality, reliability, and performance. Professionals across industries trust Littelfuse fuses for their **consistent response times, high interrupting ratings, and long service life**, even in harsh operating conditions. Whether protecting a sensitive sensor circuit in an industrial PLC or a critical load in an automotive charging system, this fuse ensures **predictable, repeatable protection** with minimal downtime. **Typical Applications:** - **Industrial Automation:** Motor starters, control panels, and PLCs where transient surges are common. - **Power Supplies:** Secondary protection in SMPS (Switch-Mode Power Supplies) and DC-DC converters. - **Automotive Electronics:** Battery management systems, infotainment modules, and sensor circuits. - **Telecommunications:** Base stations and networking equipment requiring stable current regulation. - **Consumer Electronics:** Chargers, adapters, and appliances with inductive loads. **Installation & Selection Considerations:** When selecting a fuse, professionals must balance **response time, current rating, and physical dimensions** to match the application’s demands. The **0.250A rating** makes this fuse ideal for low-power circuits, while the **time-lag characteristic** prevents false trips during startup. For optimal performance: - Ensure the fuse holder or panel is compatible with the **5x20mm axial lead format**. - Verify the fuse’s **interrupting rating** exceeds the maximum fault current in the circuit. - Inspect the fuse element visually before installation to confirm no damage occurred during handling. **Environmental & Regulatory Compliance:** The **RoHS-compliant, lead-free design** of the 0239.250MXEP ensures compliance with global environmental directives, reducing the risk of hazardous material exposure in manufacturing and end-of-life disposal. This makes it a preferred choice for OEMs and system integrators prioritizing sustainability without compromising performance. **Conclusion:** For engineers and technicians seeking a **reliable, time-lag fuse** that combines precision protection with durability, the **Littelfuse 0239.250MXEP** is a trusted solution. Its **glass body construction, axial lead design, and adherence to international standards** make it a versatile choice for a broad spectrum of applications. Backed by Littelfuse’s reputation for innovation and quality, this fuse delivers the **performance and peace of mind** required in modern electronic systems.
  • Precision time-lag design for controlled current interruption
  • Glass body construction for superior arc suppression and heat dissipation
  • Axial lead configuration for easy PCB and chassis installation
  • UL/CSA/ANCE 248 certified for global safety compliance
  • RoHS-compliant and lead-free for environmental responsibility

Specifications

Application
electronic equipment & appliances
Brand Name
Littelfuse
Connection Type
Axial Lead
Current Rating
0.250 A
Material
Glass
Mounting Type
Axial Lead
Series
SLO-BLO
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.