Littelfuse SAO008 - The National Electric Code now permits Edison-base fuses to be used only for replacements in existing installations, and then, only when there is no evidence of overfusing or tampering. All new Edison-based fuseholders must have Type S fuse adapters installed before they are placed in service. Designed to prevent installation of wrong size fuses, Type S Adapters (SAO series) screw into Edison-base fuseholders so they may accept Type S fuses. Once installed the adapters cannot be removed. To prevent shunting of open fuses or overfusing, and to reduce nuisance fuse opening, it is recommended that SAO adapters with properly rated SLO or SOO series fuses be installed in all Edison-base fuseholders.
Littelfuse

SAO008

Alternate Item Number: 0SAO008.Z

UPC: 079458400632

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Overview

Ensure electrical safety and compliance with the Littelfuse SAO008 Type S Adapter, a critical component for modernizing existing Edison-base fuseholder installations. The National Electric Code (NEC) now strictly limits the use of Edison-base fuses to replacement purposes in established systems, and only when there's no indication of tampering or improper overfusing. For all new Edison-base fuseholder installations, the NEC mandates the use of Type S fuse adapters. The Littelfuse SAO series, including the SAO008, is engineered to meet these stringent requirements. This robust adapter screws directly into standard Edison-base fuseholders, transforming them to accept only correctly sized Type S fuses. This design is fundamental to preventing the installation of incorrect fuse ratings, a common cause of electrical hazards such as fires and equipment damage. Once installed, the SAO008 adapter is permanently affixed, eliminating the possibility of its removal and ensuring ongoing safety. This permanent installation is a key feature for maintaining code compliance and preventing future safety compromises. To further enhance system reliability and minimize operational disruptions, Littelfuse strongly recommends pairing the SAO008 adapter with properly rated SLO or SOO series fuses. This combination is designed to significantly reduce nuisance fuse openings, which can stem from minor transient overcurrents that do not pose a genuine threat to the circuit. By preventing these unnecessary interruptions, the SAO008 adapter, in conjunction with appropriate Littelfuse fuses, contributes to more stable and efficient electrical operations. This is particularly vital in industrial and commercial settings where downtime can be exceptionally costly. Key benefits and features of the Littelfuse SAO008 Type S Adapter include: * **NEC Compliance:** Meets current National Electric Code requirements for Edison-base fuseholder retrofits. * **Prevents Incorrect Fuse Installation:** Engineered to accept only Type S fuses, eliminating the risk of using wrong-sized or incompatible fuses. * **Permanent Installation:** Once installed, the adapter cannot be removed, ensuring a secure and tamper-proof solution. * **Reduces Overfusing & Shunting:** Minimizes the potential for dangerous overfusing or shunting of open fuses. * **Minimizes Nuisance Openings:** Recommended for use with Littelfuse SLO/SOO fuses to reduce unnecessary fuse blowouts. * **Enhanced Electrical Safety:** Contributes to a safer electrical environment by enforcing correct fuse usage. * **Cost-Effective Upgrade:** Provides a compliant and safe upgrade path for existing Edison-base fuseholder infrastructure. The Littelfuse SAO008 is an indispensable tool for electricians, facility managers, and maintenance professionals tasked with maintaining safe and compliant electrical systems. Its straightforward installation and permanent nature make it an ideal solution for a wide range of applications, from manufacturing plants and commercial buildings to any facility still utilizing older Edison-base fuseholders. Trust Littelfuse, a global leader in circuit protection, to provide reliable and code-compliant solutions for your critical electrical infrastructure.
  • Ensures National Electric Code (NEC) compliance for Edison-base fuseholders.
  • Prevents the installation of incorrect fuse sizes, enhancing electrical safety.
  • Features a permanent installation design that cannot be removed.
  • Reduces the risk of overfusing, shunting, and nuisance fuse openings.
  • Recommended for use with Littelfuse SLO or SOO series fuses for optimal performance.

Specifications

Application
General purpose circuits and small motor loads
Brand Name
Littelfuse
Material
High-quality materials
Special Features
Feature metal threads
Sub Brand
SAO Series
Type
Plug Fuse Adapter
Package Weight (Imperial)
0.029 L
Package Weight (Metric)
0.013 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.
RTNG PLUG 400A/1000CT MVT PLUS

TR10B400

RTNG PLUG 400A/1000CT MVT PLUS

Frequently Asked Questions

What technical support resources does Littelfuse offer?

Littelfuse offers a Techline with technical experts who can provide product cross references, technical information, engineering drawings, and application assistance. They can be contacted at 1-800-TEC-FUSE or [email protected].

How can I access Littelfuse product and sales information?

Littelfuse provides multiple resources including RepFiles mobile app, Littelfuse University online training, Digital Marketing Assets portal, and the Littelfuse Business Center website for accessing product information, technical resources, and ordering.

What marketing support does Littelfuse provide to distributors?

Littelfuse offers a Marketing to Marketing program that includes co-branded email campaigns, content sharing, marketing tools, product launch support, and partner planning meetings to help distributors grow sales.

What is the Littelfuse MROplus™ program?

The MROplus™ program helps manufacturing facilities reduce costs, increase plant safety, decrease downtime, and reduce inventory through strategic inventory management and optimization.

How can distributors participate in the Stock Check Program?

Distributors can display their inventory levels on Littelfuse.com through the Stock Check Program, which provides free listings and drives new customers to their websites.

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.