Littelfuse TLS020V - TLS020V is a Telecommunications fuse with an ampere rating of 20.
Littelfuse

TLS020V

Alternate Item Number: 0TLS020.TXV

UPC: 079458061918

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Minimum Qty: 10

Multiplier: 10

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Overview

The **Littelfuse TLS020V** is a high-performance telecommunications fuse engineered to deliver precise overcurrent protection for critical telecom infrastructure. Designed with a **20A current rating**, this fuse is optimized for applications where reliability and system uptime are non-negotiable. Whether deployed in central offices, data centers, or distributed network architectures, the TLS020V ensures consistent performance under demanding conditions, safeguarding sensitive telecom equipment from damaging fault currents. Telecommunications networks operate in environments where electrical faults—such as short circuits or transient surges—can disrupt service, damage hardware, or compromise data integrity. The **TLS020V** addresses these risks with Littelfuse’s proven fuse technology, offering **fast-acting response times** to isolate faults before they escalate. Its **compact, space-efficient design** makes it ideal for dense installations, such as patch panels, distribution frames, or equipment racks, where real estate is at a premium. Additionally, the fuse’s **robust construction** resists vibration, temperature fluctuations, and corrosion, ensuring long-term reliability in both indoor and outdoor telecom enclosures. **Key Applications & Industry Use Cases:** The TLS020V is purpose-built for the telecommunications sector, where it serves as a critical component in: - **Central Office Switching Systems** – Protecting line cards, power supplies, and signaling equipment from overcurrent events. - **Fiber Optic Network Nodes** – Safeguarding active optical network (AON) and passive optical network (PON) devices, including OLTs and ONTs. - **Cellular Base Stations** – Providing backup protection for power distribution units (PDUs), rectifiers, and battery management systems. - **Data Center Infrastructure** – Shielding networking hardware, including routers, switches, and servers, from power anomalies. - **5G and Edge Computing Deployments** – Supporting high-density, low-latency applications where uninterrupted power is essential. **Why Professionals Choose Littelfuse for Telecom Fuses:** Littelfuse is a globally recognized leader in circuit protection, with over a century of innovation in fuse technology. The company’s telecom fuses, including the **TLS020V**, are engineered to meet stringent industry standards, such as **UL 248-14 (Low-Voltage Fuses)** and **IEC 60127 (Miniature Fuses)**, ensuring compliance with telecom regulatory requirements. Professionals trust Littelfuse for its: - **Consistent Performance** – Tight manufacturing tolerances guarantee predictable response times, reducing nuisance tripping while maintaining fault protection. - **Global Availability** – With a vast distribution network, Littelfuse ensures rapid delivery of fuses to support telecom projects worldwide. - **Technical Support & Customization** – Littelfuse’s engineering teams provide application-specific guidance, including fuse selection for unique telecom environments. - **Sustainability Initiatives** – Many Littelfuse fuses, including the TLS020V, are designed with recyclable materials and energy-efficient manufacturing processes. **Installation & Maintenance Considerations:** Proper installation is critical to maximizing the TLS020V’s effectiveness. Professionals should: - **Verify Compatibility** – Ensure the fuse’s voltage rating (typically **250V AC/DC**) matches the system’s requirements. - **Follow Industry Best Practices** – Use fuse holders or blocks designed for telecom applications to maintain secure connections and prevent arcing. - **Implement a Maintenance Schedule** – Regularly inspect fuses for signs of wear, discoloration, or corrosion, especially in harsh environments. - **Document Replacements** – Track fuse usage and replacement cycles to optimize inventory and minimize downtime during critical failures. For telecom operators, data center managers, and network engineers, the **Littelfuse TLS020V** represents a reliable, cost-effective solution for overcurrent protection. Its combination of **precision engineering, durability, and industry compliance** makes it a trusted choice for safeguarding telecom infrastructure—where even a momentary power disruption can have cascading consequences. Whether you’re designing a new network, upgrading existing systems, or maintaining legacy equipment, the TLS020V delivers the performance and peace of mind required in today’s high-stakes telecom landscape.
  • 20A current rating for critical telecom applications
  • Fast-acting response to isolate faults and prevent damage
  • Compact design ideal for dense installations
  • Compliant with UL 248-14 and IEC 60127 standards
  • Trusted by telecom professionals worldwide

Specifications

Application
Telecommunications
Brand Name
Littelfuse
Current Rating
20 A
Series
TLS
Special Features
Multiple mounting configurations
Sub Brand
TLS Series
Type
Current Limiting
Voltage Rating
250 V AC/DC
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

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Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.

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.