Littelfuse TLS050LSE - FUS 170VDC F/A TELE-GARD 50A PCB SPL
Littelfuse

TLS050LSE

UPC: 079458221817


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Specification Sheet

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Minimum Qty: 10

Multiplier: 10

*Contact for lower quantities*

Overview

The **Littelfuse TLS050LSE** is a high-performance, **50A PCB fuse** engineered for **170VDC applications**, delivering fast-acting overcurrent protection in demanding industrial and telecommunications environments. Part of Littelfuse’s renowned **Tele-Gard series**, this fuse combines precision engineering with rugged reliability to safeguard critical electronic components against transient surges, short circuits, and sustained overloads. Designed for seamless integration into printed circuit board (PCB) assemblies, the TLS050LSE ensures optimal performance in power supplies, battery management systems, industrial control panels, and renewable energy inverters—where consistent, high-speed fault interruption is essential. **Key Features and Technical Advantages:** - **Fast-Acting Response:** Engineered for rapid interruption of overcurrent events, the TLS050LSE minimizes damage to sensitive downstream components by isolating faults within milliseconds, a critical requirement in high-voltage DC systems. - **170VDC Rated:** Specifically designed to operate reliably in direct current systems up to 170 volts, making it ideal for modern power electronics, telecommunications infrastructure, and industrial automation where DC bus voltages are common. - **Compact PCB-Mount Design:** With a low-profile form factor optimized for surface-mount technology (SMT) assemblies, this fuse supports high-density PCB layouts without compromising protection or performance. - **Tele-Gard Series Compatibility:** Part of Littelfuse’s Tele-Gard family, the TLS050LSE leverages decades of fuse technology expertise, ensuring consistent performance across varying environmental conditions and load profiles. - **Industry-Tested Reliability:** Manufactured by Littelfuse, a global leader in circuit protection solutions, the TLS050LSE undergoes rigorous testing to meet international standards, including UL, IEC, and other regional certifications, providing peace of mind in mission-critical applications. **Typical Applications:** The TLS050LSE excels in environments where **DC power distribution, control systems, and sensitive electronics** demand robust overcurrent protection. Common use cases include: - **Telecommunications:** Protecting base station power supplies, rectifiers, and DC-DC converters from transient faults and sustained overloads. - **Industrial Automation:** Safeguarding PLCs, motor drives, and variable frequency drives (VFDs) in manufacturing and process control systems. - **Power Supplies:** Providing primary or secondary protection in switch-mode power supplies (SMPS), battery chargers, and UPS systems operating at high DC voltages. - **Renewable Energy:** Serving as a critical component in solar inverters, wind turbine controllers, and energy storage systems where DC bus voltages can exceed 100V. - **Test & Measurement Equipment:** Ensuring reliable operation in laboratory power supplies, test benches, and calibration systems. **Selection and Installation Best Practices:** When selecting a fuse for DC applications, engineers must consider several factors beyond current rating, including voltage rating, interrupting capacity, and response time. The **TLS050LSE** is optimized for **170VDC systems**, offering a balance of fast tripping and high interrupting capacity suitable for industrial-grade environments. Its **PCB-mount design** simplifies assembly and reduces wiring complexity, while its **Tele-Gard series heritage** ensures compatibility with other Littelfuse protection devices for coordinated system-level safety. Installation should follow manufacturer guidelines, including proper trace width on the PCB to handle the 50A continuous current, adequate heat sinking if required, and adherence to clearance and creepage distances for high-voltage DC circuits. Regular inspection and replacement of fuses after fault events are recommended to maintain system integrity. **Why Choose Littelfuse?** With over **100 years of innovation in circuit protection**, Littelfuse is a trusted partner for engineers worldwide. The company’s **Tele-Gard series** is specifically designed for high-voltage DC applications, offering a comprehensive portfolio of fuses, relays, and protection modules. The **TLS050LSE** exemplifies this commitment, providing **dependable performance, global certification support, and application-specific engineering** that reduces design risk and enhances system uptime. Whether deployed in a telecom base station, an industrial motor controller, or a renewable energy inverter, the TLS050LSE delivers the reliability professionals demand in today’s high-performance electronics.
  • 50A fast-acting fuse for 170VDC applications
  • Tele-Gard series: trusted high-voltage DC protection
  • Compact PCB-mount design for high-density assemblies
  • Rugged construction with global certifications (UL, IEC)
  • Ideal for telecom, industrial automation, and power supplies

Specifications

Connection Type
PCB Mount
Current Rating
50 A
Mounting Type
Surface Mount
Series
Tele-Gard
Voltage Rating
170 VDC
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.