Littelfuse ESR3XLUB0630X - POWR-SPEED SQB ESR 1500VDC 3XL BOLT 630A
Littelfuse

ESR3XLUB0630X

Alternate Item Number: ESR3XLUB0630X

UPC: 079458377774


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Specification Sheet

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Multiplier: 7

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Overview

The **Littelfuse POWR-SPEED SQB ESR 1500VDC 3XL BOLT 630A fuse** is a high-performance, fast-acting overcurrent protection solution engineered for demanding industrial and renewable energy applications. Designed to operate reliably at **1500 VDC** with a **630A current rating**, this fuse delivers superior fault protection while minimizing equipment downtime. Part of Littelfuse’s renowned **POWR-SPEED SQB series**, it combines robust construction with precision engineering to safeguard critical power systems against electrical faults, surges, and short circuits. **Key Features & Benefits:** - **High Voltage Rating (1500 VDC):** Ideal for medium- and high-voltage systems, including solar inverters, wind power systems, and industrial motor drives. - **Fast-Acting Response:** Minimizes fault energy exposure, reducing damage to sensitive components and ensuring rapid system recovery. - **3XL Bolt Terminal Design:** Facilitates secure, low-resistance connections for high-current applications, enhancing thermal stability and reliability. - **Rugged Construction:** Built to withstand harsh industrial environments, including vibration, temperature extremes, and corrosive atmospheres. - **UL Recognized & Industry Compliant:** Meets stringent safety and performance standards for global industrial and renewable energy markets. **Typical Applications:** This fuse is widely deployed in **renewable energy systems** (solar farms, wind turbines), **industrial power supplies**, **heavy machinery**, and **utility-scale electrical infrastructure**. Its high interrupting rating makes it particularly suitable for DC systems where rapid fault clearance is critical to prevent catastrophic failures. Engineers and technicians rely on the **POWR-SPEED SQB ESR series** for applications requiring **high reliability, low maintenance, and long service life** in mission-critical environments. **Why Choose Littelfuse?** Littelfuse is a **global leader in circuit protection**, with over a century of innovation in fuses, relays, and semiconductor protection devices. The **POWR-SPEED SQB ESR series** exemplifies the company’s commitment to **precision engineering, rigorous testing, and real-world performance**. Trusted by industries worldwide, Littelfuse fuses are designed to meet the evolving demands of modern power systems, ensuring **safety, efficiency, and operational continuity**. **Installation & Selection Considerations:** When specifying the **ESR3XLUB0630X**, professionals should evaluate: - **System Voltage & Current:** Ensure compatibility with the application’s DC voltage and load requirements. - **Mounting & Termination:** The bolt terminal design allows for easy integration into high-current busbars or panel assemblies. - **Environmental Conditions:** Verify the fuse’s temperature rating and enclosure requirements for the installation site. - **Coordination with Other Protective Devices:** Pair with upstream breakers or relays to achieve optimal selective coordination and system protection. For engineers seeking a **high-voltage DC fuse** that delivers **fast response, durability, and peace of mind**, the **Littelfuse POWR-SPEED SQB ESR 1500VDC 3XL BOLT 630A** is a proven choice. Backed by Littelfuse’s **technical support and global distribution network**, this fuse ensures **reliable protection for the most demanding industrial applications**.
  • 1500 VDC voltage rating for high-power applications
  • 630A current rating with fast-acting fault protection
  • 3XL bolt terminal design for secure, low-resistance connections
  • Rugged construction for harsh industrial environments
  • UL recognized and compliant with global safety standards

Specifications

Connection Type
Bolt
Current Rating
630 A
Poles
3XL
Series
POWR-SPEED SQB ESR
Voltage Rating
1500 VDC
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

LCC5

POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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.