Littelfuse JCAS020.X - FUSE JCASE 32V S/B BOX 20A. The JCASE™ is a cartridge style fuse with female terminal design, providing both increased time delay and low voltage drop to protect high current circuits and handle inrush currents. The JCASE™ was designed and patented by Littelfuse.
Littelfuse

JCAS020.X

UPC: 079458031171


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Overview

The Littelfuse JCAS020.X is a 32V DC, 20A cartridge-style fuse with a patented female terminal design, engineered for high-current industrial applications. Its unique terminal design delivers increased time delay to handle inrush currents during equipment startup, preventing nuisance tripping and ensuring operational continuity. The low voltage drop across the fuse minimizes power loss, maintaining system efficiency in high-current circuits. With an interrupting rating of 1000A at 32V DC, this fuse is ideal for protecting automotive systems, heavy machinery, power distribution units, and other demanding environments. Operating from -40°C to +125°C, the JCAS020.X withstands harsh conditions while providing reliable overcurrent protection. Its ANSI standard OCR-A font enables visual inspection, and the double spring-beam box terminal ensures secure connections. The fuse’s compact footprint optimizes space usage in OEM designs, making it a preferred choice for engineers prioritizing performance and durability. The JCAS020.X features a 50N typical insertion force and a 4N minimum extraction force, ensuring stable yet removable mounting. Available in boxed, carded, and bulk packaging (JCAS020.XP for carded, bulk options for 500/50/5 pieces), this fuse meets ANSI standards for compatibility with 2.8mm male terminals. Manufactured by Littelfuse, a global leader in circuit protection, the JCAS020.X combines patented innovation with industry-leading quality for long-term reliability in critical applications.
  • 32V DC rated, 20A current rating with Slo-Blo® time delay for inrush current handling
  • Interrupting rating of 1000A at 32V DC for reliable high-current protection
  • Operating temperature range: -40°C to +125°C for harsh environment durability
  • ANSI standard OCR-A font for visual inspection and double spring-beam box terminal for secure connections
  • Compact footprint with 50N typical insertion force and 4N minimum extraction force for stable mounting

Specifications

Amperage Rating
0.375 A
Application
electronic equipment & appliances
Brand Name
Littelfuse
Connection Type
Female Terminal
Current Rating
20 A
Mounting Type
Cartridge
Series
JCASE
Special Features
Fast-Acting
Standard
UL Standard 248-14
Sub Brand
314 Series
Type
3AB Fast-Acting
Voltage Rating
32 V DC
Package Dimensions (L x W x H)
2 IN x 1 IN x 3 IN
Package Dimensions (L x W x H)
5.08 cm x 25.4 mm x 7.62 cm
Package Weight (Imperial)
0.250 L
Package Weight (Metric)
0.113 kg
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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.

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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.
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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.