Littelfuse HCB-2/20/Q - 120/240V 20A 2P CIRCUIT BREAKER, LUGS/QUICK CONNECT
Littelfuse

HCB-2/20/Q

Documents & Media
Specification Sheet

Contact for Pricing

Minimum Qty: 25

Multiplier: 25

*Contact for lower quantities*

Overview

The **Littelfuse HCB-2/20/Q** is a high-performance **120/240V 20A 2-pole circuit breaker** engineered for industrial, commercial, and heavy-duty applications where robust electrical protection is critical. Designed with **dual terminal options—lugs and quick-connect**—this breaker offers unmatched installation flexibility, allowing professionals to adapt wiring methods based on system requirements. Whether terminating with wire lugs for permanent connections or using quick-connect terminals for rapid deployment, the HCB-2/20/Q ensures secure, low-resistance contact that minimizes the risk of loose connections or arcing faults. This dual-terminal design is particularly valuable in control panels, motor circuits, and power distribution systems where both speed and reliability are essential. Built to meet the demands of harsh industrial environments, the **Littelfuse HCB-2/20/Q** delivers consistent overcurrent protection with a **2-pole configuration** that isolates both ungrounded conductors in a circuit. This is essential for applications requiring phase-to-phase and phase-to-ground fault protection, such as HVAC systems, industrial machinery, and renewable energy installations. The breaker’s **compact form factor** allows for efficient panel mounting, optimizing space in crowded electrical enclosures without compromising performance. Littelfuse, a global leader in circuit protection solutions, has designed the HCB-2/20/Q to comply with stringent safety standards, including **UL 489** for molded-case circuit breakers, ensuring it meets the rigorous requirements of North American and international markets. Professionals trust Littelfuse for its **proven reliability, fast response times, and long service life**, making the HCB-2/20/Q an ideal choice for critical applications where downtime is not an option. **Key Applications:** - **Motor control centers (MCCs):** Protects branch circuits feeding motors, compressors, and pumps from overloads and short circuits. - **Power distribution panels:** Safeguards feeders and sub-circuits in commercial buildings, data centers, and manufacturing facilities. - **Renewable energy systems:** Provides overcurrent protection for solar inverters, wind turbine controllers, and battery storage systems. - **Industrial machinery:** Ensures safe operation of CNC machines, conveyors, and robotic systems by isolating faults before they escalate. - **HVAC systems:** Guards against electrical faults in heating, ventilation, and air conditioning equipment, preventing costly damage and downtime. **Why Choose the Littelfuse HCB-2/20/Q?** - **Dual terminal compatibility** reduces installation time and simplifies wiring configurations. - **High interrupting rating** ensures reliable operation even in high-fault-current scenarios. - **Durable construction** withstands vibration, temperature extremes, and corrosive environments. - **Easy-to-read trip indicators** allow for quick identification of faulted circuits during maintenance. - **Compliance with industry standards** guarantees compatibility with existing electrical systems and future upgrades. For engineers, electricians, and facility managers seeking a **dependable, high-quality circuit breaker** that balances performance, flexibility, and safety, the **Littelfuse HCB-2/20/Q** is a trusted solution. Its **SKU HCB-2/20/Q** is readily available through authorized distributors, ensuring fast delivery and expert support for your next project. Whether upgrading legacy systems or designing new installations, this breaker delivers the protection and reliability required in today’s demanding electrical landscapes.
  • 120/240V 20A 2-pole circuit breaker for industrial/commercial applications
  • Dual terminal design: lugs and quick-connect for flexible installation
  • UL 489 compliant for molded-case circuit breakers
  • High interrupting rating for reliable fault protection
  • Compact design optimized for control panels and power distribution

Specifications

Connection Type
Lugs/Quick Connect
Current Rating
20 A
Poles
2P
Series
HCB
Voltage Rating
120/240 V
One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.

LCMA6-8-C

One-hole, metric conductor, standard barrel with window lug, 4-6mm wire, M8 stud hole.
JB5-2 2 POLE JUMPER 5.2MM SPACING

1SNK905302R0000

JB5-2 2 POLE JUMPER 5.2MM SPACING
JB5-5 5 POLE JUMPER 5.2MM SPACING

1SNK905305R0000

JB5-5 5 POLE JUMPER 5.2MM SPACING
Ground Lug

DNGL

Ground Lug
ZCT,LZR-030(V),EMPR,EXP

76512124011

ZCT,LZR-030(V),EMPR,EXP
INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

83411621001

INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

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.