Littelfuse H313.500P - SLO-BLO GLASS FUSE H-PACK .500A. 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

H313.500P

Alternate Item Number: 0313.500HXP

UPC: 079458922790


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Overview

The Littelfuse H313.500P is a high-quality 3AG Slo-Blo® glass fuse engineered for robust circuit protection in demanding industrial environments. With a precise 0.5A current rating, this fuse is specifically designed to safeguard sensitive equipment from damaging overcurrents and short circuits. Its time-delayed (Slo-Blo) characteristic is a critical feature for applications involving inductive loads, such as electric motors, transformers, and solenoids. Unlike fast-acting fuses that might nuisance trip under the temporary inrush current of these components, the time-delayed design allows for normal startup operations while still providing rapid protection against sustained overloads and faults. This intelligent tripping behavior minimizes downtime and extends the operational life of valuable industrial machinery. Manufactured by Littelfuse, a globally recognized leader in circuit protection, the H313.500P embodies the company's commitment to reliability and performance. The 313 and 315 series fuses, to which this product belongs, are renowned for their superior protection capabilities in overload scenarios. The glass body construction not only provides a clear view of the fuse element but also incorporates an advanced indicating feature. Upon activation (blowing), the glass body undergoes a visible discoloration, instantly signaling that the fuse has opened. This visual cue eliminates the need for time-consuming and often inaccurate circuit testing, allowing maintenance personnel to quickly identify and replace the faulty fuse, thereby restoring system functionality with maximum efficiency. Key benefits of the Littelfuse H313.500P include: * **Time-Delayed Protection:** Ideal for inductive loads like motors, transformers, and solenoids, preventing nuisance tripping during startup. * **Reliable Overload and Short-Circuit Protection:** Safeguards equipment from damaging electrical events. * **Instant Visual Indication:** The discoloration of the glass body clearly identifies a blown fuse, reducing diagnostic time. * **Cost-Effective Solution:** Offers dependable circuit protection without compromising performance or budget. * **Littelfuse Quality:** Backed by the reputation of a leading manufacturer in electrical safety components. This 0.5A Slo-Blo fuse is an essential component for maintaining the integrity and operational continuity of various industrial systems. Its ability to differentiate between transient inrush currents and genuine fault conditions makes it an indispensable choice for engineers and technicians prioritizing both equipment longevity and operational efficiency. The UNSPSC code 39121627 categorizes this product under fuses, further underscoring its role in electrical protection infrastructure.
  • 0.5A current rating for precise circuit protection.
  • 3AG Slo-Blo® design with time-delayed characteristics.
  • Ideal for inductive loads like motors, transformers, and solenoids.
  • Indicating glass body for instant visual identification of blown fuses.
  • Reliable performance and cost-effective solution from Littelfuse.

Specifications

Amperage Rating
.500 Amps
Application
electronic equipment & appliances
Brand Name
Littelfuse
Current Rating
0.5 A
Material
Glass
Series
313
Size
3AG
Special Features
Slo-Blo
Standard
UL Standard 248-14
Sub Brand
313 Series
Type
3AG Slo-Blo
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Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

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9F61 Size B Clips 1.6in

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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.