Littelfuse 0ATO020.MXGLO - FUSE - ATO SMARTGLOW 12VDC 20A 1000 P. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
Littelfuse

0ATO020.MXGLO

UPC: 819562004209

Documents & Media
BrochureSpecification Sheet

Contact for Pricing

Minimum Qty: 1000

Multiplier: 1000

*Contact for lower quantities*

Overview

The Littelfuse ATO SmartGlow Fuse (SKU: 0ATO020.MXGLO) represents a significant advancement in automotive and industrial circuit protection, building upon the legacy of the original ATO fuse patented by Littelfuse in 1976. This innovative 20A, 12VDC fuse is designed to provide robust and reliable protection for electrical circuits while incorporating a unique visual diagnostic feature that dramatically simplifies troubleshooting. The integrated SmartGlow indicator light illuminates brightly when the fuse element has blown, offering an immediate and unmistakable signal of an open circuit. This eliminates the need for time-consuming manual testing or visual inspection of individual fuses, a critical advantage in busy automotive repair shops, fleet maintenance facilities, and industrial settings where downtime is costly. Engineered for demanding applications, the Littelfuse SmartGlow fuse maintains the industry-standard color coding for quick and accurate amperage identification, ensuring that the correct replacement fuse is always selected. This adherence to established standards makes it fully compatible with existing fuse holders and systems. The 20A rating is suitable for a wide range of automotive and light industrial circuits, including those powering accessories, lighting, control modules, and other electrical components that require dependable overcurrent protection. The 12VDC operational voltage is standard for most automotive and many low-voltage industrial systems. Beyond its diagnostic capabilities, the SmartGlow fuse delivers the same high level of performance and durability expected from Littelfuse products. The ATO fuse design itself is a testament to Littelfuse's pioneering spirit in circuit protection, setting a benchmark for safety and reliability in the automotive industry. By integrating the SmartGlow technology, Littelfuse has enhanced this proven design, offering a solution that not only protects equipment but also optimizes maintenance workflows. This makes it an ideal choice for: * Automotive manufacturers and aftermarket suppliers * Fleet maintenance and repair services * RV and marine applications * Specialty vehicle builders * Light industrial control panels and equipment Choosing Littelfuse means investing in quality and innovation. The SmartGlow ATO fuse is a prime example of how the company continues to evolve its product offerings to meet the changing needs of its customers, providing solutions that enhance efficiency, reduce operational costs, and ensure the safety of electrical systems. The ease of identifying a blown fuse with the SmartGlow feature translates directly into faster repairs and reduced labor costs, making it a smart investment for any application where quick diagnostics are paramount. Its robust construction ensures reliable performance even under challenging environmental conditions, further solidifying its position as a superior circuit protection device.
  • Innovative SmartGlow indicator light provides instant visual confirmation of a blown fuse.
  • Reduces troubleshooting time and simplifies circuit diagnostics in automotive and industrial applications.
  • Industry-standard ATO fuse design with color-coded amperage for easy identification (20A).
  • Reliable 12VDC circuit protection from a trusted manufacturer, Littelfuse.
  • Durable construction ensures dependable performance in demanding environments.

Specifications

Amperage Rating
20 A
Application
Automotive
Brand Name
Littelfuse
Color
Industry Standard (Color Coded)
Color
Industry Standard (varies by amperage)
Connection Type
Blade Type
Current Rating
20 A
Material
Plastic
Material
Fuse Material (likely ceramic/plastic)
Series
ATO SmartGlow
Size
ATO
Size
ATO (Automotive Blade Type)
Sub Brand
ATO Fuses
Voltage Rating
12 VDC
AUTOMO MAXI SLO-BLO SMART GLOW 60A. With “Diffusion Pill Technology” the MAXI™ Fuse provides excellent time delay characteristics and low heat dissipation. Designed and patented by Littelfuse, the MAXI™ Fuse is ideal for motor powered applications which have large inrush currents. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0MAX060.XPGLO

AUTOMO MAXI SLO-BLO SMART GLOW 60A. With “Diffusion Pill Technology” the MAXI™ Fuse provides excellent time delay characteristics and low heat dissipation. Designed and patented by Littelfuse, the MAXI™ Fuse is ideal for motor powered applications which have large inrush currents. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
FAST-ACTING AUTOMOTIVE BLADE FUSE 3A. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating.287 Series replaces 257 Series.

ATO003

FAST-ACTING AUTOMOTIVE BLADE FUSE 3A. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating.287 Series replaces 257 Series.
AUTOMO MAXI SLO-BLO SMART GLOW 80A. With “Diffusion Pill Technology” the MAXI™ Fuse provides excellent time delay characteristics and low heat dissipation. Designed and patented by Littelfuse, the MAXI™ Fuse is ideal for motor powered applications which have large inrush currents. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0MAX080.XPGLO

AUTOMO MAXI SLO-BLO SMART GLOW 80A. With “Diffusion Pill Technology” the MAXI™ Fuse provides excellent time delay characteristics and low heat dissipation. Designed and patented by Littelfuse, the MAXI™ Fuse is ideal for motor powered applications which have large inrush currents. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
FUSE - ATO SMARTGLOW 12VDC 20A 100 PC. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0ATO020.HXGLO

FUSE - ATO SMARTGLOW 12VDC 20A 100 PC. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
FAST-ACTING AUTOMO BLADE U-PACK 20A. Developed by Littelfuse for the automotive industry, the ATOF® fuse has become the original equipment circuit protection standard for foreign and domestic automobiles and trucks. Readily identifiable and easily replaced, this fuse can be specified for a variety of low voltage electronic applications.

0287020.U

FAST-ACTING AUTOMO BLADE U-PACK 20A. Developed by Littelfuse for the automotive industry, the ATOF® fuse has become the original equipment circuit protection standard for foreign and domestic automobiles and trucks. Readily identifiable and easily replaced, this fuse can be specified for a variety of low voltage electronic applications.
FUSE PAL AUTO LINK 32V FEMALE BOX 40A. PAL™ Fuses are available in current ratings up to 120 amperes, with either female or bolt-on terminals.

PAL040

FUSE PAL AUTO LINK 32V FEMALE BOX 40A. PAL™ Fuses are available in current ratings up to 120 amperes, with either female or bolt-on terminals.
FUSE - ATO SMARTGLOW 12VDC 15A 100 PC. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0ATO015.HXGLO

FUSE - ATO SMARTGLOW 12VDC 15A 100 PC. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
FUSE - ATO SMARTGLOW 12VDC 15A 1000 P. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0ATO015.MXGLO

FUSE - ATO SMARTGLOW 12VDC 15A 1000 P. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
FUSE - ATO SMARTGLOW 12VDC 25A 100 PC. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0ATO025.HXGLO

FUSE - ATO SMARTGLOW 12VDC 25A 100 PC. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
AUTOMO MINI BLADE TYPE 3000-PACK 15A. The MINI® Fuse is quickly becoming the new standard for vehicle circuit protection throughout the world. Its miniature design, patented by Littelfuse, meets the need for more circuits to be protected while utilizing less space, and its ability to cope with high temperatures in adverse environments makes the MINI® Fuse the recommended choice for protection.

0297015.WXNV

AUTOMO MINI BLADE TYPE 3000-PACK 15A. The MINI® Fuse is quickly becoming the new standard for vehicle circuit protection throughout the world. Its miniature design, patented by Littelfuse, meets the need for more circuits to be protected while utilizing less space, and its ability to cope with high temperatures in adverse environments makes the MINI® Fuse the recommended choice for protection.
FUSE - ATO SMARTGLOW 12VDC 25A 1000 P. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.

0ATO025.MXGLO

FUSE - ATO SMARTGLOW 12VDC 25A 1000 P. The ATO® Fuse was designed and patented by Littelfuse in 1976 and set the standard for automotive circuit protection. It features industry standard color coding to indicate amperage rating. Smart Glow fuses are innovative automotive style fuses (ATO, Mini, Maxi and glass tube) that feature an indicator light that glows when the fuse is blown, saving time to troubleshoot an open circuit.
FAST-ACTING AUTOMO BLADE L-PACK 30A. Developed by Littelfuse for the automotive industry, the ATOF® fuse has become the original equipment circuit protection standard for foreign and domestic automobiles and trucks. Readily identifiable and easily replaced, this fuse can be specified for a variety of low voltage electronic applications.

0287030.L

FAST-ACTING AUTOMO BLADE L-PACK 30A. Developed by Littelfuse for the automotive industry, the ATOF® fuse has become the original equipment circuit protection standard for foreign and domestic automobiles and trucks. Readily identifiable and easily replaced, this fuse can be specified for a variety of low voltage electronic applications.

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.