Littelfuse H325004P - SLO-BLO CERAMIC AXIAL H-PACK 4A. The 3AB Slo-Blo® Fuse with ceramic body construction permits higher interrupting ratings and voltage ratings. Ideal for applications where high current loads are expected. Features: In accordance with UL Standard 248-14. Available in cartridge and axial lead format and with various forming dimensions. RoHS compliant and Lead-free.
Littelfuse

H325004P

Alternate Item Number: 0325004.HXP

UPC: 079458929249


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Overview

The Littelfuse 3AB Slo-Blo® Ceramic Axial Fuse (SKU: H325004P) is a high-performance, time-delay fuse engineered for demanding industrial applications where reliable overcurrent protection is critical. Designed with a rugged ceramic body, this fuse delivers superior interrupting ratings and voltage handling compared to standard glass-body fuses, making it an ideal choice for environments with high current loads, transient spikes, or inductive loads. Certified to UL 248-14 standards, the 3AB Slo-Blo fuse ensures compliance with stringent safety and performance requirements, while its RoHS compliance and lead-free construction align with modern environmental regulations. This fuse is particularly well-suited for applications in power distribution, motor control circuits, transformers, and industrial machinery where sustained or intermittent high currents are expected. The axial lead design facilitates straightforward installation in panel boards, fuse blocks, or custom mounting configurations, reducing downtime during maintenance or upgrades. Unlike fast-acting fuses that respond to brief overloads, the Slo-Blo® time-delay characteristic allows for temporary surges (such as motor startup currents) without nuisance tripping, while still providing robust protection against sustained faults. Key features of the Littelfuse 3AB Slo-Blo Ceramic Axial Fuse include: - **High interrupting rating**: The ceramic construction enables handling of fault currents far exceeding those of standard fuses, reducing the risk of catastrophic failure in high-energy circuits. - **Time-delay operation**: The Slo-Blo® design accommodates brief overloads, making it ideal for inductive loads like motors, solenoids, and transformers. - **UL 248-14 certification**: Meets rigorous safety standards for overcurrent protection devices, ensuring reliability in critical applications. - **RoHS and lead-free compliance**: Aligns with global environmental regulations, supporting sustainable design practices in electronics and industrial systems. - **Versatile mounting options**: Available in axial lead format for compatibility with a wide range of fuse holders and circuit configurations. Industries that benefit from the 3AB Slo-Blo Ceramic Axial Fuse include: - **Industrial automation**: Protecting PLCs, drives, and control panels from transient overloads. - **Power generation and distribution**: Safeguarding transformers, switchgear, and distribution panels. - **Renewable energy**: Used in solar inverters, wind turbine controllers, and battery management systems. - **Telecommunications**: Providing surge protection for sensitive networking equipment. - **HVAC systems**: Ensuring reliable operation of compressors, fans, and control circuits. Professionals select the Littelfuse 3AB Slo-Blo fuse for its proven durability, high performance, and adherence to industry standards. Littelfuse, a global leader in circuit protection solutions, has built a reputation for innovation and reliability since 1927, offering products that engineers trust in mission-critical applications. The 3AB series, in particular, is a staple in industrial protection portfolios due to its balance of time-delay characteristics, high interrupt ratings, and compliance with global safety certifications. Whether for retrofitting existing systems or designing new installations, the H325004P fuse delivers dependable protection with minimal maintenance requirements.
  • Ceramic body for superior interrupting and voltage ratings
  • Time-delay (Slo-Blo®) design for temporary surges
  • UL 248-14 certified for industrial safety compliance
  • RoHS compliant and lead-free construction
  • Axial lead format for easy installation in fuse blocks

Specifications

Amperage Rating
4 Amps
Application
electronic equipment & appliances
Brand Name
Littelfuse
Special Features
Slo-Blo
Standard
400A@250VAC/10KA@125VAC
Sub Brand
325 Series
Type
3AB Slo-Blo
Package Dimensions (L x W x H)
1.25 IN x 0.25 IN x 0.25 IN
Package Dimensions (L x W x H)
3.175 cm x 6.35 mm x 6.35 mm
Package Weight (Imperial)
0.150 L
Package Weight (Metric)
0.068 kg
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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.