Littelfuse AGU4 - FUSE AGU 5AG 32V BOX 4A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.
Littelfuse

AGU4

Alternate Item Number: 0AGU004.T

UPC: 079458005578


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Overview

The Littelfuse AGU4 (SKU: AGU4) is a dependable glass fuse designed for critical circuit protection in automotive and industrial applications. Originating from the "all glass" designation, the AG series, including the AGU4, is a recognized standard in the automotive industry for its robust construction and consistent performance. This specific 5AG size fuse features a precise 4 Ampere (A) current rating and a 32 Volt (V) voltage rating, making it suitable for safeguarding electrical systems against overcurrent and short-circuit conditions. The AGU4 utilizes a durable glass body, facilitating easy visual inspection to quickly identify a blown fuse. This transparency also indicates the fuse's resistance to environmental factors, ensuring reliable operation. The Littelfuse AGU4 is manufactured to meet stringent industry standards, providing essential protection for sensitive electronic components and wiring harnesses. Applications include standard automotive electrical systems (passenger vehicles, trucks, specialized equipment), industrial power distribution units, control panels, and machinery. It is well-suited for automotive electrical circuits, power supplies and distribution boxes, industrial control systems, test and measurement equipment, and small appliance circuits. Littelfuse, a leader in circuit protection, offers cost-effective solutions to prevent electrical damage, reduce downtime, and enhance safety. Its compact 5AG form factor ensures compatibility with various fuse holders and space-constrained applications. The AGU4 is a 5AG size fuse with a 4A current rating and 32V voltage rating.
  • Littelfuse AGU4 4A 32V 5AG Glass Fuse
  • Designed for automotive and industrial applications
  • Durable glass body for visual inspection
  • Protects against overcurrent and short-circuit conditions
  • Compact 5AG form factor for various fuse holders

Specifications

Application
Automotive
Brand Name
Littelfuse
Current Rating
4A
Material
Glass
Series
AGU
Series
AG Series
Size
5AG
Special Features
Voltage rating 32V AC/DC
Sub Brand
AGU Boxed Series
Type
Glass Fuse
Voltage Rating
32V VAC
Package Dimensions (L x W x H)
3 IN x 2 IN x 1 IN
Package Dimensions (L x W x H)
7.62 cm x 5.08 cm x 25.4 mm
Package Weight (Imperial)
0.150 L
Package Weight (Metric)
0.068 kg
FUSE AGW 7AG 32V BOX 4A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.

AGW4

FUSE AGW 7AG 32V BOX 4A. Originally stood for “all glass.” The automotive industry uses the “AG” prefix (AGC, AGW) for most glass fuses. They vary in length, diameter and amperage rating.

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.