Littelfuse JLLS175 - JLLS175 is a Class T fuse with an ampere rating of 175 and knife-blade-style construction.
Littelfuse

JLLS175

Alternate Item Number: JLLS175.X

UPC: 079458190878


Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

Contact for Pricing

Overview

The Littelfuse JLLS175 is a robust and highly reliable Class T fuse engineered to provide superior overcurrent protection for demanding industrial electrical systems. Featuring a substantial 175 Ampere (A) current rating and a secure knife-blade connection, this fuse is designed for critical applications where dependable circuit interruption is paramount. Littelfuse, a globally recognized leader in circuit protection, delivers the JLLS175 with the assurance of quality and performance that professionals have come to expect. Class T fuses are distinguished by their fast-acting response characteristics, making them ideal for protecting sensitive equipment and preventing cascading failures in the event of short circuits or severe overloads. The JLLS175's design ensures rapid arc extinction, minimizing the duration and intensity of fault currents. This rapid response is crucial in industrial environments such as manufacturing plants, data centers, and utility substations, where downtime can incur significant financial losses and potential safety hazards. Key applications for the Littelfuse JLLS175 include: * **Motor Control Centers (MCCs):** Protecting large industrial motors from damaging overcurrents and short circuits, ensuring operational continuity. * **Power Distribution Systems:** Safeguarding transformers, switchgear, and busbars in industrial facilities and commercial buildings. * **Industrial Machinery:** Providing essential protection for heavy-duty equipment and control systems. * **Renewable Energy Installations:** Protecting inverters and other critical components in solar and wind power systems. The knife-blade connection offers a secure and efficient method for installation and replacement, facilitating maintenance and reducing the risk of loose connections. This style of termination is common in industrial fuse holders and disconnect switches, ensuring compatibility with a wide range of equipment. When selecting circuit protection, engineers and technicians prioritize fuses that offer a precise ampere rating, excellent interrupting capacity, and a reliable performance curve. The JLLS175 from Littelfuse meets these requirements, providing peace of mind that electrical systems are adequately protected against a wide spectrum of fault conditions. Its industrial-grade construction is built to withstand harsh operating environments, further enhancing its suitability for critical infrastructure. Choosing the right fuse is a fundamental aspect of electrical system design and maintenance. The Littelfuse JLLS175 Class T fuse, with its specific 175A rating and robust knife-blade termination, represents a dependable solution for safeguarding valuable assets and ensuring the uninterrupted operation of essential industrial processes. Trust in Littelfuse for your most critical circuit protection needs.
  • Littelfuse JLLS175 Class T fuse for industrial applications.
  • 175 Ampere (A) current rating for high-capacity circuits.
  • Secure and reliable knife-blade connection type.
  • Fast-acting response to overcurrents and short circuits.
  • Designed for robust protection of motors, power distribution, and machinery.

Specifications

Amperage Rating
175 Amperes
Application
Variable Speed Drives
Brand Name
Littelfuse
Interrupt Rating
200kA
Mounting
Blade
Response Time
Blade
Size
3.25L; 1.06D inches
Special Features
Current-limiting
Standard
248-15 Class T
Sub Brand
POWR-GARD JLLS Series
Type
Class T
Voltage Rating
600/300 VAC/VDC
Package Weight (Imperial)
0.210 L
Package Weight (Metric)
0.095 kg
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.