Littelfuse H318003P - FAST-ACTING GLASS AXIAL H-PACK 3A. 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

H318003P

Alternate Item Number: 0318003.HXP

UPC: 079458926347

Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

Contact for Pricing

Minimum Qty: 100

Multiplier: 100

*Contact for lower quantities*

Overview

The **Littelfuse H318003P 3AG Fast-Acting Glass Axial Fuse** is a high-performance, cost-effective solution for overcurrent protection in industrial and electronic applications. Designed to meet the rigorous demands of modern circuitry, this fuse combines rapid response with robust reliability, ensuring optimal protection for sensitive equipment. With a **3A current rating**, it provides precise fault interruption to prevent damage from transient overloads, short circuits, or sustained overcurrent conditions. Engineered in accordance with **UL Standard 248-14**, the H318003P adheres to stringent safety and performance benchmarks, making it a trusted choice for professionals across industries such as power supplies, industrial controls, automation systems, and consumer electronics. **Key Features and Benefits:** - **Fast-Acting Response:** The Littelfuse H318003P is optimized for rapid fault detection and interruption, minimizing downtime and reducing the risk of catastrophic equipment failure. Its fast-acting characteristic is ideal for protecting sensitive semiconductor devices, microcontrollers, and other high-value components where even brief overcurrent events can cause irreversible damage. - **Versatile Form Factors:** Available in both **cartridge and axial lead formats**, this fuse supports flexible installation options to accommodate diverse PCB layouts, chassis designs, and wiring configurations. The axial lead design simplifies integration into compact or high-density assemblies, while the glass body ensures durability and ease of inspection. - **Compliance and Environmental Responsibility:** Fully **RoHS-compliant and lead-free**, the H318003P aligns with global sustainability initiatives and regulatory requirements. This makes it suitable for use in environmentally conscious applications, including renewable energy systems, medical devices, and telecommunications infrastructure where hazardous substance restrictions are stringent. - **Wide Application Range:** From **industrial motor drives and PLCs** to **power distribution panels and LED lighting systems**, the H318003P delivers consistent performance across a broad spectrum of electrical and electronic systems. Its 3A rating strikes a balance between protection and operational continuity, making it a versatile choice for both low-power and moderately high-power applications. - **Manufacturer Trust and Support:** Littelfuse is a globally recognized leader in circuit protection, with over a century of innovation and expertise. The company’s fuses are trusted by engineers and technicians worldwide for their precision, consistency, and adherence to industry standards. The H318003P exemplifies this legacy, offering a reliable, off-the-shelf solution that reduces design complexity and procurement challenges. **Typical Applications:** - **Power Supplies:** Protecting transformers, rectifiers, and DC-DC converters from overloads. - **Industrial Controls:** Safeguarding PLCs, sensors, and actuators in manufacturing environments. - **Automotive Electronics:** Used in infotainment systems, battery management, and control modules. - **Telecommunications:** Ensuring uptime in networking equipment, routers, and base stations. - **Consumer Electronics:** Providing secondary protection in adapters, chargers, and household appliances. **Installation and Selection Considerations:** When selecting the **Littelfuse H318003P**, professionals should evaluate the **maximum fault current** of the circuit, ambient operating temperature, and mechanical constraints of the enclosure. The axial lead format simplifies soldering or crimping, but proper clearance and creepage distances must be maintained to prevent arcing or insulation breakdown. For high-reliability applications, consider derating the fuse by 20-25% to account for temperature variations and transient surges. Littelfuse’s technical documentation and application notes provide further guidance on optimal sizing and placement. **Why Choose Littelfuse?** Littelfuse’s commitment to **quality, innovation, and customer support** sets it apart in the circuit protection market. The H318003P is backed by comprehensive testing, global certifications, and a reputation for performance under real-world conditions. Whether deployed in a factory automation system, a renewable energy inverter, or a medical device, this fuse delivers the peace of mind that comes from using a product engineered for durability and precision. For engineers seeking a **cost-effective, fast-acting fuse** that meets UL 248-14 standards without compromising on reliability, the **Littelfuse H318003P** is an uncompromising choice.
  • 3A fast-acting fuse for precise overcurrent protection
  • UL Standard 248-14 compliant for industrial reliability
  • Available in cartridge and axial lead formats for versatile installation
  • RoHS-compliant and lead-free construction for environmental safety
  • Trusted by engineers for applications in power supplies, industrial controls, and more

Specifications

Amperage Rating
3 AMPS
Application
NA
Brand Name
Littelfuse
Connection Type
Axial Lead
Current Rating
3 A
Material
Glass
Mounting Type
Axial
Series
3AG Fast-Acting Glass Axial Fuse
Size
3AG
Special Features
Available in cartridge and axial lead format
Standard
UL Standard 248-14
Sub Brand
318 Series
Type
Fast Acting Fuse
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

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.