Littelfuse 155109U - TWIST-LOCK INLINE HOLDER NO FUSE SFE 9. Twist-Lock In-Line Fuseholder for 3AG/3AB and SFE Fuses.
Littelfuse

155109U

Alternate Item Number: 01550109ZXU

UPC: 079458115635


Documents & Media
BrochureSpecification Sheet

Contact for Pricing

Overview

The Littelfuse 155109U Twist-Lock In-Line Fuseholder (SKU: 155109U) is engineered for robust and reliable fuse protection in demanding industrial environments. Designed to accommodate 3AG, 3AB, and SFE 9 series fuses, this inline fuseholder provides a secure and efficient method for circuit protection in a wide array of applications. Its innovative twist-lock connection mechanism ensures a stable, tamper-resistant fit, minimizing the risk of accidental dislodging and guaranteeing consistent electrical contact. This feature is critical in applications where vibration or frequent handling might compromise less secure connections. Constructed with high-quality materials, the Littelfuse 155109U is built to withstand the rigors of industrial use, offering exceptional durability and long-term performance. The inline mounting type allows for seamless integration into existing wiring harnesses and power distribution systems, making installation straightforward and efficient. This fuseholder is an essential component for maintaining the integrity and safety of electrical circuits in sectors such as manufacturing, automation, telecommunications, and transportation. Key benefits of the Littelfuse 155109U include: * **Versatile Fuse Compatibility:** Supports 3AG, 3AB, and SFE 9 fuses, offering flexibility for various protection requirements. * **Secure Twist-Lock Connection:** Provides a reliable, tamper-resistant connection that enhances safety and operational stability. * **Durable Industrial Construction:** Built to endure harsh operating conditions, ensuring longevity and consistent performance. * **Easy Inline Installation:** Simplifies integration into existing electrical systems, reducing installation time and complexity. * **Enhanced Operational Efficiency:** Minimizes downtime by providing dependable fuse protection and easy fuse replacement. This fuseholder is an ideal choice for power distribution units, control panels, machinery wiring, and any application requiring dependable overcurrent protection. Littelfuse is a globally recognized leader in circuit protection, and the 155109U exemplifies their commitment to quality, innovation, and reliability. By choosing Littelfuse, you are investing in components that meet stringent industry standards and contribute to the overall safety and efficiency of your electrical systems. The 155109U is more than just a fuseholder; it's a critical element in safeguarding your valuable equipment and ensuring uninterrupted operations. Its design prioritizes both functionality and ease of maintenance, making it a preferred choice for electrical engineers and maintenance professionals alike.
  • Littelfuse 155109U Twist-Lock In-Line Fuseholder
  • Compatible with 3AG, 3AB, and SFE 9 fuses
  • Secure and tamper-resistant twist-lock connection
  • Inline mounting for easy integration
  • Durable construction for industrial applications

Specifications

Brand Name
Littelfuse
Connection Type
Twist-Lock
Material
High-quality industrial materials
Mounting Type
Inline
Series
Twist-Lock In-Line Fuseholder
Size
Inline fuseholder for 3AG/3AB/SFE 9 fuses
Special Features
See in the web sheet
Standard
See in the web sheet
Sub Brand
155 Series Fuseholder
Type
In-Line Holders

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.