Littelfuse SPD2-150-M - Surge protection devices (SPDs) provide equipment protection from overvoltage events lasting micro-seconds. By limiting the overvoltage to the equipment during these events, costly equipment damage and downtime can be mitigated. The surge protection devices for the 1+1 configuration are available for 60 V to 277 V nominal voltage sub-distribution board applications.
Littelfuse

SPD2-150-M

Alternate Item Number: SPD2-150-M

UPC: 079458253740

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Overview

The Littelfuse SPD2-150-M surge protection device (SPD) is a high-performance solution engineered to shield critical electrical and electronic equipment from destructive transient overvoltage events. Designed for 1+1 configuration applications, this SPD operates within a nominal voltage range of 60V to 277V, making it an ideal choice for sub-distribution board installations in industrial, commercial, and institutional environments. By effectively clamping overvoltage spikes to safe levels, the SPD2-150-M prevents equipment damage, reduces costly downtime, and ensures continuous operation of sensitive systems. Surge protection devices like the SPD2-150-M are essential in modern electrical infrastructure, where transient events—such as lightning strikes, switching surges, or utility grid disturbances—can generate voltage spikes lasting mere microseconds but with devastating potential. These events can irreparably damage sensitive electronics, motors, control systems, and other critical assets, leading to expensive repairs, lost productivity, and compliance risks. The SPD2-150-M mitigates these risks by diverting excess energy away from protected equipment, preserving operational integrity and extending the lifespan of connected devices. Engineered for versatility, the Littelfuse SPD2-150-M is particularly well-suited for sub-distribution applications where voltage levels typically range from 60V to 277V. This includes environments such as manufacturing facilities, data centers, healthcare campuses, educational institutions, and commercial buildings. Its 1+1 configuration ensures redundancy and reliability, allowing one module to remain operational even if the other fails. This design enhances system resilience, a critical factor in mission-critical applications where uninterrupted power is non-negotiable. Installation of the SPD2-150-M is straightforward, with options for DIN rail mounting or direct panel installation, depending on the application requirements. The device is designed to integrate seamlessly with existing electrical panels, minimizing downtime during deployment. Its compact form factor and robust construction make it suitable for both new installations and retrofits in older systems. Additionally, the SPD2-150-M is compliant with industry standards such as UL 1449, ensuring it meets rigorous safety and performance criteria for surge protection. Littelfuse, a global leader in circuit protection solutions, has built a reputation for innovation and reliability in the electrical protection industry. With decades of expertise, the company’s SPDs are trusted by engineers and facility managers worldwide to safeguard high-value assets. The SPD2-150-M exemplifies this commitment, offering a balance of performance, durability, and ease of use. Whether protecting PLCs in an automated factory, servers in a data center, or HVAC systems in a commercial building, this SPD delivers the peace of mind that comes from knowing your equipment is shielded from the unpredictable nature of power surges. For professionals tasked with designing, maintaining, or upgrading electrical systems, the Littelfuse SPD2-150-M represents a smart investment in reliability and risk mitigation. Its ability to handle frequent transient events without degradation ensures long-term performance, while its compatibility with a wide range of sub-distribution applications makes it a versatile choice. By choosing Littelfuse, you’re not just purchasing a surge protection device—you’re adopting a proven solution backed by a company with a legacy of protecting what matters most.
  • Designed for 1+1 configuration in 60V-277V sub-distribution boards
  • Mitigates transient overvoltage events lasting microseconds
  • Prevents costly equipment damage and minimizes downtime
  • Compact design with easy DIN rail or panel installation
  • Compliant with UL 1449 standards for safety and performance

Specifications

Application
Equipment protection from transient overvoltages
Brand Name
Littelfuse
Mounting Type
DIN rail or panel
Poles
1+1
Series
SPD2
Special Features
DIN Rail Mount
Standard
UL Listed/VDE/IEC
Sub Brand
SPD2 Series
Type
Type 2 Surge Protection Devices
Voltage Rating
60-277 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.