Littelfuse SPD2-550-4P0-R - Surge protection devices (SPDs) provide equipment protection from transient overvoltage events lasting micro-seconds. By limiting the overvoltage to the equipment during these events, costly damage and downtime can be mitigated. The surge protection devices for the 1+0 configuration are available for 60 V to 600 V nominal voltage sub-distribution board applications.
Littelfuse

SPD2-550-4P0-R

Alternate Item Number: SPD2-550-4P0-R

UPC: 079458253719

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Overview

The Littelfuse SPD2-550-4P0-R is a high-performance Surge Protection Device (SPD) engineered to safeguard critical electrical equipment from the damaging effects of transient overvoltage events. These microsecond-duration surges, often caused by lightning strikes or internal switching operations, can lead to catastrophic equipment failure, costly repairs, and significant operational downtime. By effectively clamping these overvoltages to a safe level, the SPD2-550-4P0-R plays a vital role in ensuring the reliability and longevity of sensitive electrical systems. Designed for 1+0 configurations, this SPD is specifically tailored for sub-distribution board applications, offering robust protection across a nominal voltage range of 60V to 600V. This broad voltage compatibility makes it a versatile solution for a wide array of industrial, commercial, and utility settings. Whether protecting control panels, automation systems, telecommunications infrastructure, or other vital equipment, the SPD2-550-4P0-R provides a crucial layer of defense. Key benefits of integrating the Littelfuse SPD2-550-4P0-R into your electrical infrastructure include: * **Enhanced Equipment Protection:** Mitigates the risk of damage from transient overvoltages, preventing premature equipment failure. * **Reduced Downtime:** Minimizes costly interruptions to operations by maintaining system integrity. * **Broad Voltage Compatibility:** Suitable for applications ranging from 60V to 600V nominal, offering flexibility in deployment. * **Reliable Performance:** Built with Littelfuse's commitment to quality and engineering excellence, ensuring dependable surge suppression. * **Cost Savings:** Prevents expensive repair or replacement costs associated with surge-induced damage. Installation of SPDs like the SPD2-550-4P0-R is a critical step in a comprehensive electrical protection strategy. Proper grounding and connection within the sub-distribution board are essential for optimal performance. Professionals typically select SPDs based on the system's nominal voltage, expected surge current, and required protection level (Up). The Littelfuse brand is synonymous with reliability and innovation in circuit protection, making their SPDs a trusted choice for engineers and facility managers seeking to protect valuable assets. By investing in the SPD2-550-4P0-R, you are investing in operational continuity and the long-term health of your electrical systems.
  • Safeguards equipment from transient overvoltage events lasting microseconds.
  • Suitable for 60V to 600V nominal voltage sub-distribution board applications.
  • 1+0 configuration for effective surge suppression.
  • Mitigates costly equipment damage and operational downtime.
  • Manufactured by Littelfuse, a trusted leader in circuit protection.

Specifications

Application
Equipment protection from transient overvoltages
Brand Name
Littelfuse
Poles
1+0
Special Features
DIN Rail Mount
Standard
UL Listed
Sub Brand
SPD2 Series
Type
Type 2 Surge Protection Devices
Voltage Rating
60–600 V

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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.