Littelfuse HCB-2/45/Q - 120/240V 45A 2P CIRCUIT BREAKER, LUGS/QUICK CONNECT
Littelfuse

HCB-2/45/Q


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Specification Sheet

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Minimum Qty: 25

Multiplier: 25

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Overview

The Littelfuse HCB-2/45/Q is a robust and reliable 2-pole circuit breaker engineered for demanding industrial and commercial electrical protection needs. Operating at 120/240V and rated for 45A, this breaker from the trusted Littelfuse HCB series offers essential overcurrent protection to safeguard sensitive equipment and prevent costly downtime. Its dual connection capability, featuring both standard lugs and convenient quick-connect terminals, significantly simplifies installation and ensures secure, low-resistance electrical connections. This versatility makes the HCB-2/45/Q an ideal choice for a wide array of applications, including control panel wiring, motor circuit protection, and general power distribution systems. Engineered to meet stringent industry safety standards, the Littelfuse HCB-2/45/Q provides precise and dependable trip characteristics. This ensures that in the event of an overload or short circuit, the breaker will swiftly interrupt the flow of current, thereby protecting downstream components from damage. The 2-pole design is crucial for applications requiring simultaneous switching of both conductors in a single-phase system, offering enhanced safety and control. Littelfuse's commitment to quality manufacturing is evident in the durable construction of this circuit breaker, designed to withstand the rigors of industrial environments. Key features and benefits of the Littelfuse HCB-2/45/Q include: * **Dual Connection Terminals:** Offers flexibility with both lug and quick-connect options for easy and secure wiring. * **High Performance:** 120/240V voltage rating and 45A current capacity suitable for many industrial loads. * **2-Pole Design:** Provides simultaneous switching for single-phase circuits, enhancing safety. * **Reliable Protection:** Ensures dependable overcurrent protection against overloads and short circuits. * **Durable Construction:** Built to withstand harsh industrial environments. * **Easy Installation:** Streamlined wiring process due to versatile terminal options. This circuit breaker is an indispensable component for electricians, panel builders, and maintenance professionals who require dependable electrical safety solutions. Whether you are designing new control systems or upgrading existing infrastructure, the Littelfuse HCB-2/45/Q delivers the performance and reliability you expect from a leading manufacturer in electrical protection. Trust Littelfuse to provide the critical safety components that keep your operations running smoothly and securely.
  • 120/240V AC voltage rating for versatile power applications.
  • 45A current rating suitable for moderate to heavy loads.
  • 2-pole design for simultaneous switching of two conductors.
  • Features both lug and quick-connect terminals for flexible installation.
  • Provides reliable overcurrent protection against overloads and short circuits.

Specifications

Connection Type
Lugs/Quick Connect
Current Rating
45 A
Poles
2P
Series
HCB
Voltage Rating
120/240 Vac
Ground Lug

DNGL

Ground Lug
RELEASE UNDERVOLTAGE BS DWB400 D70

BS DWB400D70

RELEASE UNDERVOLTAGE BS DWB400 D70
LUG LT1A-UBW800

LT1A-UBW800

LUG LT1A-UBW800
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.