Littelfuse H313.750P - SLO-BLO GLASS FUSE H-PACK .750A. 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

H313.750P

Alternate Item Number: 0313.750HXP

UPC: 079458922882


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Overview

The Littelfuse 3AG Slo-Blo® Glass Fuse, SKU H313.750P, is engineered to deliver robust and reliable circuit protection for a wide array of industrial applications. This fuse series is specifically designed to address demanding requirements, offering a cost-effective yet high-performance solution for safeguarding sensitive electronic components and machinery. At its core, the H313.750P features a time-delayed (Slo-Blo®) characteristic in the overload range. This crucial design element provides superior protection for inductive loads, which are common in industrial settings. Inductive components such as motors, transformers, and solenoids experience significant inrush currents when initially energized. A fast-acting fuse would often trip unnecessarily during these normal start-up events, leading to operational disruptions and downtime. The time-delay functionality of the 3AG Slo-Blo® fuse allows these brief, high current surges to pass without interruption, while still providing rapid and effective protection against sustained overloads and short circuits that could damage equipment or pose a safety hazard. Beyond its protective capabilities, the 3AG Slo-Blo® fuse series incorporates an invaluable indicating feature. Upon experiencing an overload or fault condition that causes it to open and interrupt the circuit, the glass body of the fuse undergoes a visible discoloration. This immediate visual cue eliminates the need for time-consuming and often frustrating circuit testing to identify a blown fuse. Technicians can quickly pinpoint the faulty component, significantly reducing diagnostic time and minimizing operational downtime. This feature is particularly beneficial in complex or hard-to-access electrical panels where troubleshooting can be challenging. The Littelfuse 313 and 315 series, to which this H313.750P belongs, are built upon the established quality and performance standards of the 3AG fuse design. Users can trust in the consistent and dependable protection that Littelfuse is renowned for. The "H-Pack" designation suggests a specific packaging format, likely optimized for industrial distribution and handling. Key benefits and features of the Littelfuse 3AG Slo-Blo® Glass Fuse (H313.750P) include: * **Time-Delayed Protection:** Ideal for inductive loads like motors, transformers, and solenoids, preventing nuisance tripping during start-up. * **Visual Indication:** Discoloration of the glass body instantly identifies an open fuse, simplifying troubleshooting and reducing downtime. * **Reliable Circuit Protection:** Offers dependable safeguarding against overloads and short circuits. * **Cost-Effective Solution:** Provides high-quality performance at an economical price point. * **Industry Standard 3AG Form Factor:** Ensures compatibility with existing fuse holders and equipment. This 0.750A fuse is an essential component for maintaining the integrity and operational efficiency of industrial electrical systems. Littelfuse's commitment to quality manufacturing ensures that this fuse will perform as expected, providing peace of mind and protecting valuable assets. Whether used in control panels, power supplies, or specialized machinery, the H313.750P is a critical element in a comprehensive electrical protection strategy.
  • Time-delayed (Slo-Blo®) response for inductive loads (motors, transformers, solenoids).
  • Visual indicating feature: glass body discoloration identifies open fuse instantly.
  • Provides reliable protection against overloads and short circuits.
  • Cost-effective solution with high-quality performance.
  • Standard 3AG fuse form factor for broad compatibility.

Specifications

Amperage Rating
.750 Amperes
Application
electronic equipment & appliances
Brand Name
Littelfuse
Connection Type
H-Pack
Current Rating
0.750 A
Material
Glass
Series
313
Series
313/315 series
Size
3AG
Size
3AG (1/4-inch)
Special Features
Slo-Blo
Standard
UL Standard 248-14
Sub Brand
313 Series
Type
3AG Slo-Blo
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.