Littelfuse 0313004.MXP - SLO-BLO GLASS FUSE M-PACK 4A. The 3AG Slo-Blo® fuse solves a broad range of application requirements while offering reliable performance and costeffective circuit protection. Features: 313 and 315 series fuses have time-delayed in the overload range, which provides superior protection inductive loads such as motors, transformers, and solenoids. 3AG indicating fuses instantly identify themselves upon opening by showing a discoloration of their glass bodies. Guesswork and time-consuming circuit testing is eliminated. This unique design offers the same quality performance characteristics as the standard 3AG fuse design.
Littelfuse

0313004.MXP

UPC: 079458923049


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Overview

The **Littelfuse Slo-Blo® Glass Fuse (SKU: 0313004.MXP)** is a premium 4A 3AG time-delay fuse engineered to deliver robust circuit protection in demanding industrial environments. Designed for applications where inductive loads such as motors, transformers, and solenoids are prevalent, this fuse provides superior performance by mitigating nuisance tripping while ensuring critical equipment remains safeguarded. The 313 and 315 series fuses feature time-delayed characteristics in the overload range, allowing them to handle temporary inrush currents common in inductive circuits without premature failure. This makes them ideal for applications where transient surges are frequent but sustained overcurrent conditions must be prevented. One of the standout features of the Littelfuse Slo-Blo Glass Fuse is its **instant visual indication** upon activation. The 3AG indicating fuse design incorporates a discoloration in the glass body when the fuse opens, providing immediate confirmation of a fault condition. This eliminates the need for time-consuming circuit testing or troubleshooting, significantly reducing downtime in critical operations. The visual indication is a hallmark of Littelfuse’s commitment to user-friendly design, ensuring that maintenance teams can quickly identify and replace faulty components without unnecessary delays. The **3AG fuse body** is a trusted standard in industrial and commercial electrical systems, known for its reliability and compatibility with a wide range of fuse holders and panels. The Littelfuse Slo-Blo Glass Fuse maintains all the performance characteristics of a standard 3AG fuse while adding the time-delay functionality essential for protecting inductive loads. This makes it a versatile solution for industries such as manufacturing, HVAC, automotive, and renewable energy, where equipment reliability is paramount. **Key Applications:** - **Motors and motor starters:** Protects against overloads and short circuits in fractional and integral horsepower motors. - **Transformers:** Safeguards transformers from inrush currents and sustained overloads. - **Solenoids and relays:** Ensures reliable operation in control circuits and inductive switching applications. - **Power supplies and industrial machinery:** Provides overcurrent protection in variable frequency drives (VFDs), pumps, and conveyor systems. - **HVAC systems:** Ideal for compressors, fans, and other inductive loads in heating and cooling equipment. **Why Choose Littelfuse?** Littelfuse is a global leader in circuit protection, with over a century of innovation and reliability in electrical safety solutions. The company’s Slo-Blo® series is a benchmark for time-delay fuses, trusted by engineers and technicians worldwide for its consistent performance and durability. The **0313004.MXP** fuse is manufactured to meet stringent industry standards, ensuring compatibility with existing infrastructure and adherence to safety regulations. Whether deployed in new installations or as a replacement in legacy systems, this fuse delivers the peace of mind that comes with Littelfuse’s reputation for quality and precision. **Installation and Compatibility:** The Littelfuse Slo-Blo Glass Fuse is designed to fit standard 3AG fuse holders, making it a drop-in replacement for existing 3AG fuses in industrial panels, control boxes, and distribution boards. Its compact form factor ensures easy integration into tight spaces, while the glass body allows for visual inspection of the fuse element. Professionals should follow standard electrical safety protocols during installation, including de-energizing the circuit and verifying the correct ampere rating (4A) for the application. The fuse’s time-delay characteristics should be matched to the load’s inrush current profile to avoid nuisance tripping while ensuring adequate protection. **Cost-Effective Protection with Long-Term Reliability:** Beyond its immediate benefits, the Littelfuse Slo-Blo Glass Fuse offers a cost-effective solution for circuit protection. By preventing damage from overloads and short circuits, it reduces the risk of costly equipment failures and unplanned downtime. The fuse’s durable construction and long service life further enhance its value, making it a smart investment for any industrial operation prioritizing reliability and efficiency. With Littelfuse’s global distribution network, the **0313004.MXP** is readily available for quick procurement, ensuring minimal disruption to maintenance schedules. For engineers, technicians, and facility managers seeking a trusted, high-performance fuse for inductive loads, the Littelfuse Slo-Blo Glass Fuse (SKU: 0313004.MXP) stands out as a premier choice. Its combination of time-delayed protection, visual indication, and industry-leading reliability makes it an indispensable component in modern electrical systems.
  • 4A time-delay fuse for inductive loads (motors, transformers, solenoids)
  • Instant visual indication via glass body discoloration when activated
  • Time-delayed overload protection to prevent nuisance tripping
  • Standard 3AG size for compatibility with existing fuse holders
  • Trusted Littelfuse quality for industrial and commercial applications

Specifications

Amperage Rating
5 Amperes
Application
TVSS
Brand Name
Littelfuse
Current Rating
4 A
Material
Glass
Series
313/315 series
Size
3AG
Special Features
Current-limiting
Standard
UL Recognized
Sub Brand
POWR-GARD
Type
Surge Supp
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.