Littelfuse TLS040LB - TLS040LB is a Telecommunications fuse with an ampere rating of 40.
Littelfuse

TLS040LB

Alternate Item Number: 0TLS040.TXLB

UPC: 079458061802

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Minimum Qty: 500

Multiplier: 500

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Overview

The **Littelfuse TLS040LB** is a high-performance telecommunications fuse engineered to deliver reliable overcurrent protection in critical telecom infrastructure. Designed for demanding environments, this 40A fuse ensures optimal performance and safety in applications where consistent circuit integrity is non-negotiable. Part of Littelfuse’s trusted TLS series, the TLS040LB is built to meet the rigorous demands of modern telecommunications systems, including central offices, data centers, and field installations. Telecommunications fuses like the TLS040LB play a vital role in protecting sensitive equipment from damaging overcurrent conditions, which can lead to equipment failure, downtime, or even catastrophic damage. The TLS040LB is specifically engineered for telecom applications, where reliability and precision are paramount. Its robust construction and adherence to industry standards make it a preferred choice for professionals who require dependable circuit protection without compromise. **Key Features and Benefits:** - **40A Current Rating:** Provides precise overcurrent protection for telecom systems, ensuring equipment operates within safe limits. - **High-Quality Construction:** Engineered for durability, the TLS040LB withstands harsh environmental conditions, including temperature fluctuations and mechanical stress. - **Compliance with Industry Standards:** Meets stringent telecom industry requirements, ensuring compatibility and reliability in critical applications. - **Easy Installation:** Designed for seamless integration into existing telecom fuse blocks and panels, reducing downtime during installation or replacement. - **Long-Term Reliability:** Littelfuse’s reputation for quality ensures the TLS040LB delivers consistent performance over its operational lifespan. **Typical Applications:** The TLS040LB is ideal for a wide range of telecommunications applications, including: - **Central Offices:** Protecting switching equipment and power distribution systems. - **Data Centers:** Safeguarding servers, routers, and networking hardware from power surges. - **Field Installations:** Providing reliable protection in outdoor or remote telecom sites where environmental conditions are challenging. - **Network Infrastructure:** Used in fiber optic networks, DSL systems, and wireless base stations to prevent equipment damage. **Why Choose Littelfuse?** Littelfuse is a global leader in circuit protection solutions, trusted by professionals across industries for its innovation, quality, and reliability. With decades of experience in developing fuses and protective devices, Littelfuse’s products are synonymous with performance and safety. The TLS040LB exemplifies this commitment, offering telecom professionals a trusted solution for protecting critical infrastructure. **Installation and Maintenance:** The TLS040LB is designed for straightforward installation in standard fuse holders or panels. Professionals should ensure proper sizing and compatibility with the system’s voltage and current requirements. Regular inspection and replacement of fuses, as part of a proactive maintenance plan, help maintain system reliability and prevent unexpected failures. For telecom operators and engineers seeking a high-quality, reliable fuse for overcurrent protection, the **Littelfuse TLS040LB** is an excellent choice. Its combination of performance, durability, and compliance with industry standards makes it a trusted component in telecom infrastructure worldwide.
  • 40A current rating for precise overcurrent protection
  • High-quality construction for durability in harsh environments
  • Compliance with telecom industry standards for reliability
  • Easy installation in standard fuse holders and panels
  • Long-term performance backed by Littelfuse’s reputation

Specifications

Application
Telecommunications
Brand Name
Littelfuse
Special Features
Multiple mounting configurations
Sub Brand
TLS Series
Type
Current Limiting
POWR-SPEED SQB SIZE 1XL BOLTED BL 350A. Littelfuse PSX series 1500 V dc high-speed square bodyfuses are specially designed to protect battery energy storage systems (BESS), photovoltaic inverters, and many of dc applications such as dc common bus systems, larger industrial regenerative drives, rectifiers and, metal processing equipment. The PSX series fuses are extremely fast-acting, offering high-speed performance up to 1500 V dc, ranging from 80 A to 1400 A in the smallest NH XL package sizes. The PSX series is available with multiple mounting terminations including flush-end style, DIN-style and bolted-blade style. Visual blown fuse indication is standard on all fuses and optional micro-switch is available for external indication. PSX series are certified to UL 248-13 and designed to meet EN high-speed semiconductor fuse standard and IEC 60269-7, a new battery protection fuse standard in development.

PSX1XLUB0350

POWR-SPEED SQB SIZE 1XL BOLTED BL 350A. Littelfuse PSX series 1500 V dc high-speed square bodyfuses are specially designed to protect battery energy storage systems (BESS), photovoltaic inverters, and many of dc applications such as dc common bus systems, larger industrial regenerative drives, rectifiers and, metal processing equipment. The PSX series fuses are extremely fast-acting, offering high-speed performance up to 1500 V dc, ranging from 80 A to 1400 A in the smallest NH XL package sizes. The PSX series is available with multiple mounting terminations including flush-end style, DIN-style and bolted-blade style. Visual blown fuse indication is standard on all fuses and optional micro-switch is available for external indication. PSX series are certified to UL 248-13 and designed to meet EN high-speed semiconductor fuse standard and IEC 60269-7, a new battery protection fuse standard in development.
High Speed Fuse Amp-Trap® A70Q 700VAC 650VDC 250A Bolted Blade

A70Q250-4

High Speed Fuse Amp-Trap® A70Q 700VAC 650VDC 250A Bolted Blade
High-speed fuse (uR) S1* BKN/50 200kA 690V 400A aR protection type

170M3468

High-speed fuse (uR) S1* BKN/50 200kA 690V 400A aR protection type
A060AGH300

135A965F01

A060AGH300

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.