Littelfuse HCB-3/20/Q - 120/240V 20A 3P CIRCUIT BREAKER, LUGS/QUICK CONNECT
Littelfuse

HCB-3/20/Q

Documents & Media
Specification Sheet

Contact for Pricing

Minimum Qty: 20

Multiplier: 20

*Contact for lower quantities*

Overview

The **Littelfuse HCB-3/20/Q** is a high-performance **3-pole circuit breaker** engineered for industrial and commercial electrical systems requiring **120/240V** and **20A** protection. Designed with **lug and quick-connect terminals**, this breaker delivers unmatched installation flexibility, accommodating both traditional wiring and modular connections. Built to meet the rigorous demands of modern electrical infrastructure, the HCB-3/20/Q ensures **reliable overcurrent and short-circuit protection**, safeguarding critical equipment in control panels, machinery, and industrial applications. **Key Features & Technical Specifications:** - **Voltage Rating:** 120/240V AC, suitable for single- and split-phase systems. - **Current Rating:** 20A, providing precise protection for medium-duty circuits. - **Pole Configuration:** 3-pole design for balanced three-phase protection in industrial environments. - **Terminal Options:** Dual **lug and quick-connect terminals** enable compatibility with a wide range of wiring methods, including stranded and solid conductors. - **Robust Construction:** Durable housing and internal components designed for long-term reliability in harsh conditions. - **Compliance:** Meets industry standards for electrical safety and performance, ensuring compatibility with UL and other regulatory requirements. **Industry Applications & Use Cases:** The **HCB-3/20/Q** is ideal for applications where **three-phase power distribution** and **overcurrent protection** are critical. Common use cases include: - **Industrial Machinery:** Protects motors, pumps, and CNC equipment from overloads and short circuits. - **Commercial Buildings:** Used in electrical panels for HVAC systems, lighting circuits, and power distribution units. - **Control Panels:** Ensures safe operation of automation systems, PLCs, and other sensitive electronics. - **Renewable Energy Systems:** Provides protection in solar inverters and battery storage systems where 120/240V circuits are prevalent. **Why Choose Littelfuse for Circuit Protection?** Littelfuse is a globally recognized leader in **electrical protection solutions**, with over a century of innovation in circuit breakers, fuses, and surge protection devices. The company’s products are trusted in **manufacturing plants, data centers, utilities, and commercial facilities** worldwide, where reliability and precision are non-negotiable. The **HCB-3/20/Q** exemplifies Littelfuse’s commitment to **engineering excellence**, offering a combination of **performance, durability, and installation flexibility** that reduces downtime and enhances system safety. **Installation & Compatibility Considerations:** Professionals select the **HCB-3/20/Q** for its **versatile terminal options**, which simplify wiring in both new installations and retrofit projects. The **quick-connect terminals** allow for rapid deployment in modular systems, while the **lug terminals** provide a secure connection for traditional wiring. When installing, ensure proper **breaker panel compatibility** and **conductor sizing** to maximize performance and safety. Littelfuse provides comprehensive **technical documentation**, including wiring diagrams and compliance certifications, to support seamless integration. **Long-Term Benefits of the HCB-3/20/Q:** - **Enhanced Safety:** Protects equipment and personnel from electrical faults, reducing the risk of fires and damage. - **Operational Efficiency:** Minimizes unplanned downtime by preventing overloads and short circuits. - **Cost Savings:** Durable construction and reliable performance reduce maintenance and replacement costs. - **Future-Proofing:** Compatible with evolving electrical standards, ensuring longevity in dynamic industrial environments. For engineers, electricians, and facility managers seeking a **high-quality, versatile circuit breaker**, the **Littelfuse HCB-3/20/Q** delivers uncompromising protection and flexibility. Whether deployed in a **factory automation system, commercial building, or renewable energy installation**, this breaker stands as a testament to Littelfuse’s dedication to **electrical safety and innovation**.
  • 20A, 3-pole circuit breaker rated for 120/240V applications
  • Dual lug and quick-connect terminals for versatile wiring options
  • Robust construction for long-term reliability in industrial environments
  • UL-compliant overcurrent and short-circuit protection
  • Ideal for control panels, machinery, and commercial electrical systems
Ground Lug

DNGL

Ground Lug
COVER,SET,AP-400,MC-265a~400a

64611614007

COVER,SET,AP-400,MC-265a~400a
INTERLOCK UNIT,AR-12M(SEPERATE),GMC(D)-6~16M

83411621001

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

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.