Littelfuse HCB-3/20/L - 120/240V 20A 3P CIRCUIT BREAKER, LUGS
Littelfuse

HCB-3/20/L

Documents & Media
Specification Sheet

Contact for Pricing

Minimum Qty: 20

Multiplier: 20

*Contact for lower quantities*

Overview

The **Littelfuse HCB-3/20/L** is a high-performance **120/240V 20A 3-pole circuit breaker with lugs**, engineered for robust industrial electrical protection and power distribution. Designed to meet the demanding requirements of modern industrial environments, this circuit breaker delivers reliable overcurrent protection to safeguard critical equipment and prevent costly downtime. With its **three-pole configuration** and **lug-type connections**, the HCB-3/20/L ensures secure, low-resistance power delivery, making it an ideal choice for applications where electrical stability and safety are paramount. Industrial facilities, manufacturing plants, and commercial buildings rely on **Littelfuse** for trusted electrical protection solutions, and the HCB-3/20/L is no exception. This **20-ampere circuit breaker** is specifically designed to handle **120/240V systems**, providing versatile compatibility for a wide range of electrical panels, machinery, and control systems. Its **compact yet durable construction** allows for seamless integration into control panels, switchgear, and industrial enclosures, while its **lug terminals** facilitate easy and reliable wiring connections. **Key applications** for the Littelfuse HCB-3/20/L include: - **Motor control centers (MCCs)** and industrial machinery protection - **Control panels** and distribution boards in manufacturing facilities - **HVAC systems** and building automation systems - **Renewable energy systems**, including solar and wind power installations - **Commercial and industrial lighting systems** requiring phase-balanced protection When selecting a circuit breaker for industrial use, professionals prioritize **reliability, safety, and ease of installation**. The HCB-3/20/L excels in all three areas. Its **three-pole design** ensures balanced protection across all phases, reducing the risk of equipment damage due to phase imbalance or overcurrent conditions. The **lug-type connections** provide a secure termination point, minimizing the risk of loose wiring or poor electrical contact, which can lead to overheating or failures. Additionally, Littelfuse’s reputation for **high-quality circuit protection** ensures that this breaker meets stringent industry standards for performance and durability. Installation of the HCB-3/20/L is straightforward, thanks to its **user-friendly design** and compatibility with standard industrial enclosures. Electricians and technicians appreciate the breaker’s **clear labeling, robust housing, and snap-in mounting mechanism**, which simplifies panel assembly and maintenance. Whether used in new installations or as a replacement in existing systems, the HCB-3/20/L offers a cost-effective solution for enhancing electrical safety and system reliability. Littelfuse, a global leader in circuit protection, has built its reputation on innovation, quality, and customer trust. With decades of experience in developing solutions for industrial, commercial, and residential applications, Littelfuse circuit breakers like the HCB-3/20/L are trusted by professionals worldwide. By choosing Littelfuse, you’re not just selecting a circuit breaker—you’re investing in **peace of mind, operational efficiency, and long-term reliability** for your electrical systems. For industrial applications where performance matters, the **Littelfuse HCB-3/20/L** is the smart choice.
  • 20A, 120/240V, 3-pole circuit breaker with lug-type connections
  • Designed for industrial machinery, control panels, and distribution systems
  • Secure lug terminals ensure low-resistance power delivery and reliable wiring
  • Compact, durable construction for seamless integration into industrial enclosures
  • Trusted Littelfuse quality for long-term electrical protection and safety

Specifications

Connection Type
Lugs
Current Rating
20 A
Poles
3P
Series
HCB
Voltage Rating
120/240 V
Ground Lug

DNGL

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

83411621001

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

76512124011

ZCT,LZR-030(V),EMPR,EXP
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.