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Littelfuse 3455RF4 - PANELMNT SHKSAFE FUSHLDR 5X20MM FUS RF4. Designed to eliminate the possibility of electrical shock, as defined in IEC standards 65 and 257. Shock-Safe fuseholders feature a low profile body, fingergrip knob and anti-tease feature that eliminates circuit interruptionwhen knob is accidentally depressed.

Littelfuse 3455RF4 PANELMNT SHKSAFE FUSHLDR 5X20MM FUS RF4. Designed to eliminate the possibility of…

Alternate Item Number: 03455RF4X

UPC: 079458004649

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Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Littelfuse 3455RF4 Shock-Safe Panel Mount Fuseholder (SKU: 3455RF4) is a compact, IEC 65 and IEC 257 compliant solution designed to eliminate electrical shock risks in industrial and commercial applications. This panel-mount fuseholder features a low-profile body with a finger-grip knob for easy handling and an anti-tease mechanism that prevents accidental circuit interruption when the knob is depressed. The 5x20mm fuse size ensures compatibility with standard fuse types, while the panel-mount design allows for secure installation in control panels, enclosures, and distribution boards. The anti-tease feature enhances operational reliability by reducing unintended fuse removal or insertion, making it ideal for applications where safety and uptime are critical. Certified for shock-safe operation, this fuseholder meets stringent international standards, providing peace of mind in high-risk electrical environments. Key specifications include a 5x20mm fuse size, panel-mount installation, and compliance with IEC 65 and IEC 257 standards. The low-profile body design minimizes space usage in crowded control panels, while the finger-grip knob ensures quick and safe fuse replacement without tools. The anti-tease feature is particularly valuable in high-vibration environments or applications where accidental knob depression could disrupt operations. This fuseholder is manufactured in the US and is suitable for use in control panels, industrial machinery, and commercial electrical systems where electrical safety is a priority. The 3455RF4 is part of Littelfuse’s Shock-Safe series, designed to meet the demands of modern electrical safety standards. Its compact form factor and robust construction make it a reliable choice for engineers and technicians seeking to enhance safety in their electrical systems. Whether used in automation systems, power distribution units, or test equipment, this fuseholder delivers consistent performance and compliance with global safety regulations.
  • IEC 65 & IEC 257 compliant for shock-safe operation
  • 5x20mm fuse size compatibility with standard fuse types
  • Low-profile body with finger-grip knob for easy handling
  • Anti-tease feature prevents accidental circuit interruption
  • Panel-mount design for secure installation in enclosures

Specifications

Application
Circuit Board
Brand Name
Littelfuse
Material
Poly
Mounting Type
Panel Mount
Series
Shock-Safe
Series
3455RF4
Size
5x20mm
Special Features
Drip proof option available on screwdriver slot knob style
Standard
RoHS
Sub Brand
345 Series
Type
Fuseholder
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3452LS7A

PANELMOUNT SHKSAFE FSEHLDR 2AG FUSE LS7A. Designed to eliminate the possibility of electrical shock, as defined in IEC standards 65 and 257. Shock-Safe fuseholders feature a low profile body, fingergrip knob and anti-tease feature that eliminates circuit interruptionwhen knob is accidentally depressed.
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The Littelfuse 600 V in-line watertight fuse holders are the ideal answer for all high humidity and corrosive environments where fuses are required. Available in both breakaway and non-breakaway, single and double pole versions, these fuse holders allow maximum flexibility for any application.

LECABS

The Littelfuse 600 V in-line watertight fuse holders are the ideal answer for all high humidity and corrosive environments where fuses are required. Available in both breakaway and non-breakaway, single and double pole versions, these fuse holders allow maximum flexibility for any application.
1POLE INLINE FUSEHOLDER W/CRIMP TERMINAL. The Littelfuse 600 V in-line watertight fuse holders are the ideal answer for all high humidity and corrosive environments where fuses are required. Available in both breakaway and non-breakaway, single and double pole versions, these fuse holders allow maximum flexibility for any application. Applications: Street, alley, and parking lot lighting. Security and perimeter lighting. Traffic signals. Outdoor illuminated signs. Sports lighting. Boat electrical circuits. Tractors and yard equipment. General outdoor circuit protection. Benefits: Safety-Permits individual fixture or device to be disconnected from circuit for servicing. Eliminates possibility of shock. Individual fixture fusing-Prevents loss of one fixture through accident, vandalism, or end of life from darkening the entire circuit. Simplifies maintenance- Being able to immediately identify the one faulted fixture eliminates testing the entire circuit, speeds repair and permits servicing the individual unit while the rest of the circuit is functioning. Reduces damage from fault-Can prevent faulted ballast or other failure from severely damaging fixture or device, reducing necessary repair or need of replacement. Features: Watertight-Internal O-ring provides watertight seal. Superior terminal seeds-Ultrasonically-welded terminals provide maximum strength and eliminate leaking at terminals. Break-Resistant- Fiberglass –reinforced polymer body resists damage from dropping or impact much better than phenolic look-alikes. Flexible terminations-Accommodates a wide range of stranded or solid copper conductors, with either crimp or screw terminals. One-pole and two-pole models- available to accommodate all system voltages up to 600v.

LEBBB

1POLE INLINE FUSEHOLDER W/CRIMP TERMINAL. The Littelfuse 600 V in-line watertight fuse holders are the ideal answer for all high humidity and corrosive environments where fuses are required. Available in both breakaway and non-breakaway, single and double pole versions, these fuse holders allow maximum flexibility for any application. Applications: Street, alley, and parking lot lighting. Security and perimeter lighting. Traffic signals. Outdoor illuminated signs. Sports lighting. Boat electrical circuits. Tractors and yard equipment. General outdoor circuit protection. Benefits: Safety-Permits individual fixture or device to be disconnected from circuit for servicing. Eliminates possibility of shock. Individual fixture fusing-Prevents loss of one fixture through accident, vandalism, or end of life from darkening the entire circuit. Simplifies maintenance- Being able to immediately identify the one faulted fixture eliminates testing the entire circuit, speeds repair and permits servicing the individual unit while the rest of the circuit is functioning. Reduces damage from fault-Can prevent faulted ballast or other failure from severely damaging fixture or device, reducing necessary repair or need of replacement. Features: Watertight-Internal O-ring provides watertight seal. Superior terminal seeds-Ultrasonically-welded terminals provide maximum strength and eliminate leaking at terminals. Break-Resistant- Fiberglass –reinforced polymer body resists damage from dropping or impact much better than phenolic look-alikes. Flexible terminations-Accommodates a wide range of stranded or solid copper conductors, with either crimp or screw terminals. One-pole and two-pole models- available to accommodate all system voltages up to 600v.

Frequently Asked Questions

What types of fuses does Littelfuse offer for industrial applications?

Littelfuse offers UL Class fuses, high-speed fuses, medium voltage fuses, 10 x 38 mm fuses, and solar fuses for industrial applications.

What is Littelfuse University (LFU)?

LFU is an award-winning resource offering in-depth training courses and quick references on Littelfuse products, programs, and tools.

What are Littelfuse fuse blocks and holders used for?

Littelfuse fuse blocks and holders are selected by OEMs and designers for their compact designs, indication features, and DIN-rail mounting flexibility.

What do Littelfuse POWR-BLOKS power distribution blocks provide?

POWR-BLOKS power distribution blocks offer a safe and convenient way to splice cables and manage power distribution requirements within panels and systems.

What do Littelfuse feeder protection relays guard against?

Feeder protection relays protect circuits from overcurrent, ground faults, phase loss, overload, and other detrimental conditions.

What is the Industrial Shock-Block® GFCI designed for?

The Industrial Shock-Block® GFCI is designed for people protection in industrial facilities and meets UL Standard 943C Class C and Class D.

How do Littelfuse resistance grounding systems improve safety?

High-resistance grounding limits point-of-fault damage and eliminates arc-flash hazards and transit overvoltages associated with ground faults.

What protection do Littelfuse voltage monitors offer?

Voltage monitors provide protection against both supply line and load side faults when the motor is running.

What functions can Littelfuse timers and flashers control?

Timers and flashers can delay starting and stopping loads, and control cycling and sequencing of motors, pumps, compressors, heaters, and lighting.

How do Littelfuse arc-flash protection relays work?

These relays detect a developing arc-flash incident and send a trip signal to interrupt power before significant damage occurs.

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.