Littelfuse 354621-BL - 1 POLE NEMA STYLE 3/16 ANTI-ROTATION. A low profile fuse block featuring individual barriers which reinforce the fuse clips while providing greater protection against clip damage and electrical shock. The unique design permits self-alignment of clips to fuse cap. This, plus a one-piece clip/terminal assures low contact resistance. Higher current ratings have been attained using spring brass clips. With the exception of the two-pole unit, multiple pole units may be broken apart to obtain desired number of poles.
Littelfuse

354621-BL

Alternate Item Number: 03540621ZXBL

UPC: 079458108064


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Overview

The Littelfuse 354621-BL is a single-pole, NEMA-style 3/16 fuse block engineered for robust electrical protection in industrial and commercial settings. This low-profile unit features individual barriers that reinforce the fuse clips, enhancing protection against mechanical damage and electrical shock hazards. Its unique self-aligning design ensures precise contact between the fuse clips and the fuse cap, promoting consistent electrical performance. The integrated one-piece clip/terminal assembly minimizes contact resistance, leading to improved electrical efficiency and reduced heat generation. Higher current ratings are achieved through the use of spring brass clips, which maintain stable contact pressure over time. Multiple pole units, excluding the two-pole configuration, can be separated to achieve the desired number of poles, offering significant installation flexibility for various system requirements. Manufactured in the United States, the 354621-BL fully complies with NEMA Style specifications for standardized performance. Its UNSPSC code is 39121629, classifying it under electrical fittings and hardware. This fuse block is ideal for applications demanding durable, safe, and precise fuse protection, including control panels, machinery, and distribution systems. The robust construction ensures long-term reliability in demanding environments where electrical integrity is paramount. The 354621-BL provides essential circuit protection with a focus on safety and operational efficiency.
  • 1 Pole NEMA Style 3/16" fuse block
  • Individual barriers reinforce fuse clips for enhanced protection
  • Self-aligning clips to fuse cap for optimal contact
  • One-piece clip/terminal assures low contact resistance
  • Spring brass clips for higher current ratings

Specifications

Application
Curcuit Board
Brand Name
Littelfuse
Standard
RoHS
Sub Brand
354 OMNI-BLOK Series
ACS 600V DISTRIBUTION BLK 950A 1 POLE

LD5704-1

ACS 600V DISTRIBUTION BLK 950A 1 POLE
SPLICER BLOCK DISTRIBUTION BLOCK 1 POLE. POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.

LS1300-1

SPLICER BLOCK DISTRIBUTION BLOCK 1 POLE. POWR-BLOKS power distribution blocks offer a safe, convenient way of splicing cables, providing a fixed junction tap-off point or splitting primary power into secondary circuits. LX2XXX-DIN series offers integral DIN-Rail mount and an optional hinged safety cover. Applications: Typical applications include heating, air conditioning and refrigeration systems, elevator systems, material handling equipment, control panels, motor controls, switchgear, and anywhere power needs to be distributed to more than one load.
600V CLASS CD BLOCK 60A 1 POLE NON-ID

LFC60060-1C

600V CLASS CD BLOCK 60A 1 POLE NON-ID
POWER DISTRIBUTION BLOCK 3953 1 POLE

LD3953-1

POWER DISTRIBUTION BLOCK 3953 1 POLE
ACS 600V DISTRIBUTION BLK 420A 1 POLE

LD3595-1

ACS 600V DISTRIBUTION BLK 420A 1 POLE
ACS 600V DISTRIBUTION BLK 115A 1 POLE

GDBAD241Z

ACS 600V DISTRIBUTION BLK 115A 1 POLE
1 POLE 1/4 QUICK CLIP ANTI-ROTATION. A low profile fuse block featuring individual barriers which reinforce the fuse clips while providing greater protection against clip damage and electrical shock. The unique design permits self-alignment of clips to fuse cap. This, plus a one-piece clip/terminal assures low contact resistance. Higher current ratings have been attained using spring brass clips. With the exception of the two-pole unit, multiple pole units may be broken apart to obtain desired number of poles.

354821-BL

1 POLE 1/4 QUICK CLIP ANTI-ROTATION. A low profile fuse block featuring individual barriers which reinforce the fuse clips while providing greater protection against clip damage and electrical shock. The unique design permits self-alignment of clips to fuse cap. This, plus a one-piece clip/terminal assures low contact resistance. Higher current ratings have been attained using spring brass clips. With the exception of the two-pole unit, multiple pole units may be broken apart to obtain desired number of poles.
250V CLASS H BLOCK 100A 1 POLE

LFH25100-1C

250V CLASS H BLOCK 100A 1 POLE
600V CLASS H BLOCK 100A 1 POLE NON-ID

LFH60100-1C

600V CLASS H BLOCK 100A 1 POLE NON-ID
600V CLASS J BLOCK 30A 1 POLE NON-ID

LFJ60030-1C

600V CLASS J BLOCK 30A 1 POLE NON-ID
600V CLASS J BLOCK 30A 1 POLE NON-ID

LFJ60030-1P

600V CLASS J BLOCK 30A 1 POLE NON-ID
ACS 600V CC POWR-SAFE 30A IND 1 POLE

LFPSC0001ZXID

ACS 600V CC POWR-SAFE 30A IND 1 POLE

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.