Littelfuse JLLN1000XXP - JLLN1000P is a Class T fuse with an ampere rating of 1000 and knife-blade-style construction.
Littelfuse

JLLN1000XXP

Alternate Item Number: JLLN1000XXP

UPC: 079458821383


Documents & Media
BrochureTechnical BulletinTechnical DrawingSpecification Sheet

Contact for Pricing

Overview

The **Littelfuse JLLN1000XXP Class T fuse** is a high-performance industrial-grade overcurrent protection solution engineered for demanding power distribution systems. Designed with a **1000A ampere rating** and **knife-blade-style construction**, this fuse delivers robust circuit protection in environments where reliability and durability are critical. As part of Littelfuse’s **JLLN series**, the JLLN1000XXP meets stringent safety and performance standards, ensuring consistent operation even under extreme electrical conditions. Class T fuses are widely recognized in industrial applications for their **fast-acting response** and **high interrupting rating**, making them ideal for protecting sensitive equipment from damaging overcurrent events. The **knife-blade connection** design of the JLLN1000XXP ensures secure, low-resistance electrical contact, minimizing the risk of arcing or loose connections that could compromise system integrity. This construction also simplifies installation and maintenance, reducing downtime in critical operations. **Key applications** for the Littelfuse JLLN1000XXP include: - **Industrial control panels** where precise overcurrent protection is essential for machinery and automation systems. - **Motor circuits** in manufacturing plants, ensuring protection against overloads and short circuits. - **Power distribution units** in commercial buildings, data centers, and utility substations. - **Renewable energy systems**, including solar and wind power installations, where stable and reliable protection is non-negotiable. - **Heavy machinery and equipment** in mining, oil & gas, and construction sectors, where harsh operating conditions demand rugged protection solutions. Littelfuse, a global leader in circuit protection, has built a reputation for innovation and reliability in the electrical industry. The **JLLN series** reflects the company’s commitment to delivering fuses that combine **high performance, durability, and compliance with international safety standards** such as UL, CSA, and IEC. Professionals in electrical engineering, maintenance, and facility management trust Littelfuse for solutions that enhance operational safety and efficiency. When selecting a Class T fuse like the JLLN1000XXP, engineers and technicians prioritize factors such as **interrupting rating, response time, and compatibility with existing systems**. The **1000A rating** of this fuse makes it suitable for high-power applications, while its **knife-blade design** ensures compatibility with standard fuse holders and disconnect switches. Additionally, the fuse’s **compact footprint** and **high thermal stability** contribute to its versatility across diverse industrial environments. For industries where **uninterrupted power supply** and **equipment longevity** are paramount, the Littelfuse JLLN1000XXP provides a dependable solution. Its **superior arc interruption capability** and **low maintenance requirements** translate to cost savings over time, making it a cost-effective choice for long-term installations. Whether used in new construction or retrofitting existing systems, this fuse offers peace of mind by safeguarding critical infrastructure against electrical faults. In summary, the **Littelfuse JLLN1000XXP Class T fuse** is more than just a protective component—it is a cornerstone of modern industrial electrical safety. By integrating this fuse into power distribution systems, businesses can mitigate risks, ensure compliance with safety regulations, and maintain operational continuity in even the most challenging conditions.
  • 1000A ampere rating for high-power industrial applications
  • Knife-blade-style construction for secure, low-resistance connections
  • Fast-acting response to protect sensitive equipment from overcurrent
  • Compliant with UL, CSA, and IEC safety standards
  • Ideal for industrial control panels, motor circuits, and power distribution units

Specifications

Amperage Rating
1000 Amp
Application
Variable Speed Drives
Brand Name
Littelfuse
Connection Type
Knife-blade
Current Rating
1000 A
Interrupt Rating
50000A@160VDC
Response Time
Fast-Acting (F)
Series
JLLN
Sub Brand
POWR-GARD JLLN Series
Type
Class T
Voltage Rating
300/160 VAC/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.