Littelfuse HCB-2/30/Q - 120/240V 30A 2P CIRCUIT BREAKER, LUGS/QUICK CONNECT
Littelfuse

HCB-2/30/Q

Documents & Media
Specification Sheet

Contact for Pricing

Minimum Qty: 25

Multiplier: 25

*Contact for lower quantities*

Overview

The **Littelfuse HCB-2/30/Q** is a high-performance **120/240V 30A 2-pole circuit breaker** engineered for robust overcurrent and short-circuit protection in demanding industrial and commercial environments. Designed with **dual terminal options (lugs and quick-connect)**, this breaker simplifies installation while ensuring secure, reliable connections in control panels, motor circuits, and power distribution systems. Built to meet stringent safety standards, including UL 489 and CSA certification, the HCB-2/30/Q delivers consistent performance under harsh operating conditions, making it an ideal choice for facilities prioritizing uptime and electrical safety. **Key Features & Benefits:** - **Dual Terminal Compatibility**: Supports both **lug-type (screw) and quick-connect terminals**, offering flexibility for retrofits or new installations where wiring preferences vary. This dual design reduces inventory needs by accommodating multiple connection methods without compromising reliability. - **High Interrupt Rating**: Provides superior fault current interruption, protecting downstream equipment from damage during short-circuit events. The breaker’s **2-pole design** ensures balanced protection across both legs of 120/240V systems, critical for motors, HVAC systems, and industrial machinery. - **Compact & Modular**: Fits standard **1-inch-wide panel spaces**, optimizing space in crowded control panels or distribution boards. Its modular form factor allows for easy integration into Littelfuse’s **HCB series** or third-party enclosures. - **Durable Construction**: Features a **thermoplastic housing** rated for high-temperature environments and vibration resistance, ensuring long-term operation in industrial settings. The breaker’s **trip-free mechanism** prevents nuisance tripping while maintaining responsiveness to overloads. - **Industry-Recognized Reliability**: Littelfuse, a global leader in circuit protection, backs the HCB-2/30/Q with decades of expertise in designing solutions for power distribution, renewable energy, and manufacturing. Trusted by engineers worldwide, Littelfuse breakers are a staple in applications where **safety, precision, and longevity** are non-negotiable. **Typical Applications:** The HCB-2/30/Q excels in environments where **electrical systems demand robust protection** from overloads and faults. Common use cases include: - **Motor Control Centers (MCCs)**: Protecting 3-phase motors (240V) with phase-to-phase fault coverage. - **HVAC Systems**: Safeguarding compressors and fans in commercial buildings or industrial facilities. - **Power Distribution Panels**: Managing branch circuits in manufacturing plants, data centers, or renewable energy systems. - **Machine Tool Wiring**: Ensuring safe operation of CNC machines, presses, and automated equipment. - **Renewable Energy**: Integrating with solar inverters or wind turbine controllers where 120/240V distribution is required. **Selection & Installation Considerations:** When choosing a circuit breaker like the HCB-2/30/Q, professionals prioritize **interrupt rating, trip characteristics, and terminal compatibility**. The HCB-2/30/Q’s **30A rating** makes it suitable for circuits drawing up to 30A continuously, with a **magnetic trip** for instantaneous fault response and a **thermal trip** for overload protection. Its **2-pole design** is essential for split-phase systems (e.g., 120/240V in North America), where unbalanced loads could otherwise cause nuisance tripping. Installation is straightforward with the HCB-2/30/Q’s **snap-in mounting** on DIN rails or panel mounting via screws. The **quick-connect terminals** (compatible with 0.25-inch spade connectors) speed up wiring in tight spaces, while the **lug terminals** provide a secure, vibration-resistant connection for larger conductors. Always verify wire gauge compatibility (typically **14–8 AWG** for lugs) and ensure proper torque settings to prevent loose connections. **Why Choose Littelfuse?** Littelfuse’s reputation in circuit protection spans over a century, with a portfolio trusted by industries ranging from **automotive to aerospace**. The HCB series, including the HCB-2/30/Q, reflects the company’s commitment to **innovation, safety, and compliance** with global standards. Whether you’re upgrading an existing system or designing a new one, Littelfuse breakers offer **predictable performance, minimal maintenance, and peace of mind**—qualities that reduce total cost of ownership and mitigate risk. For engineers and maintenance teams seeking a **versatile, high-quality circuit breaker**, the Littelfuse HCB-2/30/Q stands out as a reliable solution. Its combination of **dual terminals, robust construction, and industry-leading protection** makes it a smart investment for any facility where electrical safety and uptime are critical.
  • Dual terminal compatibility (lugs and quick-connect) for flexible wiring
  • 2-pole design for balanced 120/240V system protection
  • High interrupt rating for superior fault current interruption
  • Compact 1-inch-wide design for space-constrained panels
  • UL 489 and CSA certified for industrial safety standards
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.