Littelfuse ESR3XLDB0550X - POWR-SPEED SQB ESR 1500VDC 3XL DIN 550A
Littelfuse

ESR3XLDB0550X

Alternate Item Number: ESR3XLDB0550X

UPC: 079458377804


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Overview

The Littelfuse POWR-SPEED SQB ESR 1500VDC 3XL DIN 550A is a state-of-the-art surge protective device (SPD) engineered to safeguard critical high-voltage DC power systems from damaging transient overvoltages. Designed for demanding industrial environments, this robust SPD offers unparalleled protection with a substantial 1500 VDC rating and an impressive 550 A current handling capability. Its 3XL form factor ensures compatibility with large-scale electrical infrastructure, making it an ideal choice for applications where space and robust protection are paramount. The POWR-SPEED SQB ESR series from Littelfuse is renowned for its reliability and performance in protecting sensitive equipment in high-energy sectors. This specific model, SKU ESR3XLDB0550X, leverages advanced ESR (Energy Suppression and Response) technology to effectively divert surge currents, thereby preventing equipment failure, reducing costly downtime, and extending the operational lifespan of connected systems. The DIN mounting type facilitates straightforward and secure integration into standard electrical enclosures and control panels, simplifying installation and maintenance procedures for electrical engineers and technicians. Key applications for the Littelfuse POWR-SPEED SQB ESR 1500VDC 3XL DIN 550A include: * **Renewable Energy Systems:** Protecting inverters, charge controllers, and DC collection systems in solar farms and wind energy installations from lightning strikes and grid-induced surges. * **Industrial Automation:** Ensuring the continuous operation of complex machinery and control systems in manufacturing plants, preventing disruptions caused by power fluctuations. * **Power Generation and Distribution:** Safeguarding substations, DC power supplies, and critical grid components from transient events. * **High-Voltage DC Transmission:** Providing essential protection for the infrastructure of emerging DC transmission networks. Littelfuse's commitment to quality and innovation is evident in the design and manufacturing of the POWR-SPEED SQB ESR series. Professionals trust Littelfuse for their comprehensive range of circuit protection solutions, backed by extensive research and development and rigorous testing. Selecting the right SPD is crucial for maintaining system integrity and operational efficiency. The Littelfuse POWR-SPEED SQB ESR 1500VDC 3XL DIN 550A represents a superior choice for applications requiring high-voltage DC surge protection, offering peace of mind and robust defense against electrical disturbances. Its substantial specifications and proven technology make it an indispensable component for any high-reliability DC power system.
  • High-voltage DC surge protection with 1500 VDC rating.
  • Robust 550 A current handling capability for demanding applications.
  • 3XL size for large-scale electrical infrastructure compatibility.
  • Easy integration via standard DIN mounting type.
  • Littelfuse POWR-SPEED SQB ESR series for reliable transient overvoltage protection.

Specifications

Current Rating
550 A
Mounting Type
DIN
Series
POWR-SPEED SQB ESR
Size
3XL DIN
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 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
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in

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.