Littelfuse TOO001 - Littelfuse Plug fuses provide overcurrent protection to general purpose circuits and small motor loads. Edison-base Plug fuses (TOO and TLO series) feature metal threads similar to incandescent lamp bases. Type S Plug fuses (SOO and SLO series) utilize a nonmetallic threaded base and must be used with Type S adapters (SAO series). The National Electrical Code permits Edison base Plug fuses to be used for replacement purposes only. Type S fuses and adapters prevent shunting open fuses and over-fusing.
Littelfuse

TOO001

Alternate Item Number: 0TOO001.Z

UPC: 079458430318

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Overview

The Littelfuse TOO001 Plug Fuse (SKU: TOO001) is a critical component for ensuring the safety and reliability of electrical systems in industrial and commercial environments. Manufactured by Littelfuse, a globally recognized leader in circuit protection, this Edison-base plug fuse is engineered to provide robust overcurrent protection for general-purpose circuits and small motor loads. Its design, featuring metal threads akin to incandescent lamp bases, facilitates straightforward installation and replacement in compatible sockets. This fuse series, including the TOO and TLO models, adheres to National Electrical Code (NEC) guidelines, which permit Edison-base plug fuses for replacement purposes only. This stipulation is crucial for maintaining system integrity and preventing potential hazards. The primary function of the Littelfuse TOO001 is to interrupt the flow of electrical current when it exceeds a safe level, thereby safeguarding sensitive equipment from damage caused by overloads or short circuits. This proactive protection is essential for minimizing downtime and costly repairs. Key benefits of utilizing Littelfuse TOO001 Plug Fuses include: * **Reliable Overcurrent Protection:** Effectively shields circuits and loads from damaging electrical surges. * **Easy Installation:** The Edison-base design with metal threads ensures compatibility with standard sockets, simplifying maintenance. * **NEC Compliance:** Meets regulatory requirements for replacement applications, ensuring safe and compliant usage. * **Equipment Safeguarding:** Protects valuable machinery and electronic components from premature failure. * **Operational Continuity:** Minimizes interruptions by preventing circuit damage. While the TOO001 is designed for replacement applications, Littelfuse also offers Type S Plug Fuses (SOO and SLO series) along with their corresponding Type S adapters (SAO series). These Type S systems are specifically designed to prevent the common practice of "shunting" (bypassing an open fuse) and "over-fusing" (installing a fuse with a higher amperage rating than the circuit is designed for), offering an enhanced layer of safety and preventing incorrect fuse installations. The Littelfuse TOO001 is an ideal choice for a wide array of applications, including but not limited to: * Residential and commercial lighting circuits * Small appliance protection * Control circuits in machinery * General purpose branch circuits requiring reliable fuse protection When selecting fuses, professionals consider the specific current rating, voltage rating, and interrupting capacity required for the application. Littelfuse's commitment to quality and innovation ensures that their circuit protection devices, like the TOO001 plug fuse, deliver consistent performance and peace of mind. Trust Littelfuse for dependable circuit protection solutions that meet the demanding needs of modern electrical systems.
  • Provides essential overcurrent protection for general-purpose circuits and small motor loads.
  • Features an Edison-base design with metal threads for easy installation and replacement.
  • Compliant with National Electrical Code (NEC) for replacement purposes only.
  • Safeguards equipment from damage due to overloads and short circuits.
  • Manufactured by Littelfuse, a trusted leader in circuit protection solutions.

Specifications

Application
General purpose circuits and small motor loads
Brand Name
Littelfuse
Special Features
Metal threads
Sub Brand
TOO Series
Type
Time Delay Fuse
Package Weight (Imperial)
0.050 L
Package Weight (Metric)
0.023 kg
Littelfuse Plug fuses provide overcurrent protection to general purpose circuits and small motor loads. Edison-base Plug fuses (TOO and TLO series) feature metal threads similar to incandescent lamp bases. Type S Plug fuses (SOO and SLO series) utilize a nonmetallic threaded base and must be used with Type S adapters (SAO series). The National Electrical Code permits Edison base Plug fuses to be used for replacement purposes only. Type S fuses and adapters prevent shunting open fuses and over-fusing.

TOO6.25

Littelfuse Plug fuses provide overcurrent protection to general purpose circuits and small motor loads. Edison-base Plug fuses (TOO and TLO series) feature metal threads similar to incandescent lamp bases. Type S Plug fuses (SOO and SLO series) utilize a nonmetallic threaded base and must be used with Type S adapters (SAO series). The National Electrical Code permits Edison base Plug fuses to be used for replacement purposes only. Type S fuses and adapters prevent shunting open fuses and over-fusing.
Mersen plug fuses are intended for industrial and residential applications. Non time-delay fuses are available for receptacle and lighting circuits and time-delay fuses for motor loads. For Canadian requirements, a type P fuse is used for non-motor loads and Type D, for electrical heating and cyclical load circuits. Both fuses have low melting-point temperature elements. Type S plug fuses are time-delay and tamper resistant. 125 Volts 15 Amps GP series. 125 Volts 20 Amps GTL series.

GTL20

Mersen plug fuses are intended for industrial and residential applications. Non time-delay fuses are available for receptacle and lighting circuits and time-delay fuses for motor loads. For Canadian requirements, a type P fuse is used for non-motor loads and Type D, for electrical heating and cyclical load circuits. Both fuses have low melting-point temperature elements. Type S plug fuses are time-delay and tamper resistant. 125 Volts 15 Amps GP series. 125 Volts 20 Amps GTL series.
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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.