Littelfuse TLS001LB - TLS001LB is a Telecommunications fuse with an ampere rating of 1.
Littelfuse

TLS001LB

Alternate Item Number: 0TLS001.TXLB

UPC: 079458061697

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Minimum Qty: 500

Multiplier: 500

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Overview

The Littelfuse TLS001LB 1A Telecommunications Fuse is a precision-engineered circuit protection solution designed to safeguard critical telecom infrastructure against overcurrent conditions. As a trusted component in Littelfuse’s extensive portfolio of high-reliability fuses, the TLS001LB delivers consistent performance in environments where uptime and equipment integrity are non-negotiable. With a nominal current rating of 1 ampere, this fuse is optimized for low-current telecom applications, including central office switches, DSLAMs, fiber optic transmission systems, and 5G base stations. Its compact form factor and robust construction ensure seamless integration into densely packed network equipment, while its fast-acting response time minimizes the risk of damage to sensitive components during transient overcurrent events. Telecommunications networks operate under stringent reliability requirements, where even brief overcurrent conditions can disrupt service, damage equipment, or lead to costly downtime. The TLS001LB addresses these challenges by providing precise fault isolation, ensuring that only the affected circuit is interrupted while the rest of the system remains operational. This selective protection is critical in modern telecom architectures, where redundancy and failover mechanisms depend on the integrity of individual circuit paths. The fuse’s design incorporates high-quality materials and advanced manufacturing processes to ensure consistent breaking capacity and long service life, even in harsh environmental conditions such as elevated temperatures or high humidity. Professionals in the telecom industry rely on Littelfuse for circuit protection solutions that meet or exceed industry standards, including ITU-T, Telcordia, and UL certifications. The TLS001LB is no exception, having been rigorously tested to ensure compliance with these stringent requirements. Its installation is straightforward, typically requiring minimal tools and following standard fuse holder or panel-mount configurations. For optimal performance, technicians should verify compatibility with the specific telecom equipment’s voltage and current specifications, as well as the fuse holder’s mechanical constraints. Regular inspection and replacement of fuses after fault events are recommended to maintain system reliability. Littelfuse, a global leader in circuit protection with over a century of innovation, has built a reputation for delivering products that combine technical excellence with practical usability. The TLS001LB exemplifies this commitment, offering telecom operators and equipment manufacturers a cost-effective yet high-performance solution for safeguarding their networks. Whether deployed in legacy PSTN systems, next-generation 5G networks, or data center interconnects, this fuse provides the reliability and precision required to keep critical communications flowing uninterrupted.
  • 1A current rating for low-current telecom applications
  • Fast-acting response to minimize equipment damage
  • Compact design for seamless integration into network equipment
  • Compliant with ITU-T, Telcordia, and UL industry standards
  • Trusted by telecom professionals for reliable circuit protection

Specifications

Application
Telecommunications
Brand Name
Littelfuse
Current Rating
1 A
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.