Littelfuse TLS020LS - TLS020LS is a Telecommunications fuse with an ampere rating of 20.
Littelfuse

TLS020LS

Alternate Item Number: 0TLS020.TXLS

UPC: 079458102239

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Minimum Qty: 500

Multiplier: 500

*Contact for lower quantities*

Overview

The **Littelfuse TLS020LS 20A Telecommunications Fuse** is a high-performance, industry-standard solution designed to deliver precise overcurrent protection in critical telecom infrastructure. Engineered for reliability and durability, this fuse is a trusted choice for professionals who require consistent performance in high-stakes environments where equipment uptime is non-negotiable. As part of Littelfuse’s extensive portfolio of circuit protection solutions, the TLS020LS is specifically tailored to meet the stringent demands of telecommunications networks, ensuring seamless operation even under challenging conditions. Telecommunications systems operate in environments where even minor disruptions can cascade into costly downtime. The **TLS020LS 20A fuse** addresses this risk by providing fast, accurate response to overcurrent events, preventing damage to sensitive components such as switches, routers, and power distribution units. Its **20-ampere rating** makes it ideal for protecting branch circuits in central offices, data centers, and cell towers, where stable power delivery is essential for maintaining service quality. Unlike generic fuses, the TLS020LS is built to comply with **telecom-specific standards**, including UL and IEC requirements, ensuring compatibility with a wide range of infrastructure equipment. **Key features and benefits of the Littelfuse TLS020LS include:** - **High interrupt rating** for robust protection against short circuits and transient surges, reducing the risk of catastrophic failures. - **Compact and durable design**, optimized for installation in tight spaces within telecom racks, cabinets, or distribution panels. - **Consistent performance** across a broad temperature range, ensuring reliability in both indoor and outdoor telecom environments. - **Easy identification and replacement**, with clear ampere rating markings and a design that allows for quick swap-out during maintenance operations. - **Compliance with industry standards**, including UL 248-14 and IEC 60127-2, guaranteeing compatibility with global telecom infrastructure. Professionals in the telecommunications industry rely on **Littelfuse** for its reputation as a leader in circuit protection, with over a century of innovation and a commitment to quality. The **TLS020LS** exemplifies this legacy, offering a balance of performance, safety, and longevity that reduces total cost of ownership. Whether deployed in legacy systems or next-generation 5G networks, this fuse provides the peace of mind that comes from using a product engineered to the highest standards. **Typical applications for the TLS020LS 20A fuse include:** - **Central office power distribution** – Protecting feeder circuits and distribution panels from overcurrent events. - **Cell site infrastructure** – Safeguarding base station equipment, rectifiers, and battery backup systems. - **Data center power management** – Ensuring stable operation of network switches, servers, and cooling systems. - **Fiber optic and DSL networks** – Protecting sensitive electronics in access nodes and customer premises equipment. - **Industrial telecom applications** – Including SCADA systems, remote monitoring units, and industrial IoT deployments. When selecting a fuse for telecom applications, factors such as **interrupt rating, response time, and environmental durability** are critical. The **TLS020LS** excels in all these areas, making it a preferred choice for engineers and technicians who demand reliability without compromise. Its **20A rating** strikes an optimal balance between protection and power handling, ensuring it can handle the typical load requirements of telecom circuits while providing a safety margin for transient conditions. For professionals tasked with maintaining or upgrading telecom infrastructure, the **Littelfuse TLS020LS 20A Telecommunications Fuse** represents a smart investment in long-term reliability. Backed by Littelfuse’s global support network and decades of expertise in circuit protection, this fuse is more than just a component—it’s a cornerstone of resilient telecom operations.
  • 20A ampere rating for telecom circuit protection
  • High interrupt rating for robust short-circuit protection
  • Compact design for easy installation in telecom racks
  • Compliant with UL 248-14 and IEC 60127-2 standards
  • Trusted by professionals for reliability in critical telecom applications

Specifications

Application
Telecommunications
Brand Name
Littelfuse
Current Rating
20 A
Series
TLS
Special Features
Multiple mounting configurations
Sub Brand
TLS Series
Type
Current Limiting
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.