Littelfuse 318.187P - FAST-ACTING TYPE GLASS W/ AXIAL .187A. The 3AG Fast-Acting Fuse solves a broad range of application requirements while offering reliable performance and cost-effective circuit protection. Features: In accordance with UL Standard 248-14. Available in cartridge and axial lead format and with various forming dimensions. RoHS compliant and Lead-free.
Littelfuse

318.187P

Alternate Item Number: 0318.187VXP

UPC: 079458926064


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Overview

The **Littelfuse 318.187P 3AG Fast-Acting Glass Fuse** is a high-performance, cost-effective circuit protection solution designed for industrial and electronic applications requiring rapid response to overcurrent conditions. With a precise .187A current rating and axial lead configuration, this fuse delivers reliable performance while safeguarding sensitive components from damage caused by transient surges or sustained overloads. Engineered to meet **UL Standard 248-14**, the 318.187P ensures compliance with stringent safety and performance benchmarks, making it a trusted choice for professionals in power distribution, control systems, and instrumentation. This **3AG series fuse** is part of Littelfuse’s industry-leading portfolio of fast-acting fuses, renowned for their quick response times and consistent operation. The glass construction provides visual confirmation of fuse status—clear visibility of the element’s condition allows for rapid diagnostics during maintenance or troubleshooting. Available in both **cartridge and axial lead formats**, the 318.187P offers versatility to accommodate diverse circuit designs, from compact PCB assemblies to larger industrial panels. Its **RoHS-compliant and lead-free** composition aligns with modern environmental standards, ensuring compatibility with global regulatory requirements without compromising performance. **Key Applications & Industries:** The Littelfuse 318.187P is ideally suited for a wide range of applications, including: - **Power supplies and converters** – Protecting sensitive electronics from inrush currents and short circuits. - **Industrial control systems** – Safeguarding PLCs, relays, and motor controllers against overcurrent events. - **Telecommunications equipment** – Ensuring reliable operation of network infrastructure and data transmission devices. - **Automotive and aerospace electronics** – Providing robust protection in harsh operating environments. - **Consumer electronics** – Shielding delicate components in appliances, chargers, and portable devices. **Why Choose Littelfuse?** Littelfuse is a global leader in circuit protection, with over a century of innovation and reliability in the field. The company’s **3AG series fuses**, including the 318.187P, are trusted by engineers and technicians worldwide for their **consistent performance, broad compatibility, and adherence to international standards**. Whether deployed in high-volume manufacturing, critical infrastructure, or precision instrumentation, Littelfuse fuses are engineered to deliver **dependable protection with minimal downtime**. **Installation & Selection Considerations:** When selecting a fuse, professionals must balance **response time, current rating, and environmental conditions**. The **fast-acting nature** of the 318.187P makes it ideal for protecting components sensitive to even brief overcurrent events, such as semiconductors or microcontrollers. For optimal performance, ensure the fuse is installed in a location with adequate ventilation and that the mounting configuration (axial or cartridge) matches the circuit design. Regular inspection of the fuse element—made possible by the transparent glass body—helps prevent unplanned outages by identifying potential issues before failure occurs. **Technical Compliance & Environmental Responsibility:** The 318.187P meets **UL 248-14**, a critical standard for low-voltage fuses in North America, ensuring it has undergone rigorous testing for interrupting capacity, voltage rating, and temperature performance. Its **RoHS compliance** and lead-free construction further support sustainability initiatives, making it a preferred choice for OEMs and end-users prioritizing eco-friendly components. With a **compact 3AG (3.6mm x 10mm) form factor**, this fuse integrates seamlessly into space-constrained designs without sacrificing protection capabilities. For engineers, technicians, and procurement specialists seeking a **reliable, high-quality fuse** that combines speed, compliance, and versatility, the **Littelfuse 318.187P 3AG Fast-Acting Glass Fuse** stands as a proven solution. Backed by Littelfuse’s reputation for innovation and durability, this fuse delivers the peace of mind required in today’s demanding industrial and electronic environments.
  • Fast-acting response for sensitive electronic protection
  • 0.187A current rating with axial lead configuration
  • UL Standard 248-14 compliant for safety and performance
  • RoHS-compliant and lead-free construction
  • Available in cartridge and axial lead formats
  • Glass body for visual status confirmation
  • Ideal for power supplies, industrial controls, and telecommunications

Specifications

Amperage Rating
12 Amps
Application
fluorescent Lighting
Brand Name
Littelfuse
Connection Type
Axial Lead
Current Rating
0.187 A
Material
Glass
Mounting Type
Through-Hole
Series
Fast-Acting
Size
3AG (3.6mm x 10mm)
Special Features
Fast-Acting
Standard
Standard 248-14 UL Listed/CSA
Sub Brand
POWR-GARD LGR Series
Type
InLine Fuse
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9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.