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Littelfuse
SURGE PROTECTIVE DEVICES

SURGE PROTECTIVE DEVICES

Product catalog summary

Overview
Littelfuse's SPD2 and SPDN series are surge protective devices (SPDs) designed to protect electrical equipment from transient overvoltage events, such as those caused by lightning strikes or equipment operations. These devices are DIN-rail mounted and suitable for various applications, including solar power systems.

SPD2 Series
The SPD2 series offers configurations like 1P+0, 2P+0, 3P+0, and 4P+0, handling nominal voltages from 60V to 750V. Key features include high-energy transient clamping, compliance with UL and VDE-IEC standards, interlocking tab mechanisms, and pluggable modules for easy maintenance. They also have thermal protection and an IP20 protection rating.

SPDN Series
The SPDN series provides similar protection with models SPDN-A, SPDN-B, SPDN-C, and SPDN-D, designed for easy integration and robust surge protection.

Key Specifications

Nominal Discharge Current: 20 kA
Maximum Discharge Current: Up to 50 kA
Response Time: Less than 25 ns
Operating Temperature Range: -40°C to +80°C
Protection Rating: IP20

Applications
SPDs are suitable for industrial controls, power distribution, HVAC systems, and communication networks, protecting infrastructure like load centers, transformers, and generators.

Key Features

Compact Design: Enhances panel design flexibility.
Visual Life Indicator: Allows quick module replacement checks.
Pluggable Modules: Easy replacement without tools.
Thermal Protection: Prevents catastrophic failure.
IP20 Protection Rating: Ensures a finger-safe design.

Specifications

Network Systems: Compatible with TT and TN-S systems.
Mode of Protection: L-N, N-PE.
Nominal Discharge Current: 20 kA/40 kA.
Maximum Discharge Current: 50 kA/65 kA.
Response Time: Less than 25 ns.
Operating Temperature Range: -40 °C to +80 °C.
Altitude: Up to 4,000 m.
Degree of Protection: IP20.

Product Variants

SPD2-075-1P1-R: Suitable for 60 V nominal AC voltage.
SPD2-150-1P1-R: Suitable for 120 V nominal AC voltage.
SPD2-300-1P1-R: Suitable for 240 V nominal AC voltage.
SPD2-350-1P1-R: Suitable for 277 V nominal AC voltage.

Standards and Compliance

Complies with IEC 61643-11:2011, EN 61643-11:2012, and UL 1449, 4th edition.

Applications
Designed for sub-distribution board applications with nominal voltages from 240 V to 277 V, and suitable for solar string box and inverter applications in photovoltaic systems.

Conclusion
Littelfuse's SPDs offer robust protection against transient overvoltage events, ensuring equipment safety and operational continuity. Their design and features make them versatile for various electrical systems.

Catalog excerpts

SURGE PROTECTIVE DEVICES CATALOG SPDN SERIES

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SPDN Series

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Surge Protective Devices TABLE OF CONTENTS

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Surge Protective Devices SPD2 SERIES OVERVIEW Littelfuse Type 2 Surge Protection Devices (SPDs) for branch circuits safeguard components from transient overvoltage or surges by limiting the fault current to a load or the unit being protected. Surges may be caused by an indirect lightning strike but, the majority—sixty to eighty percent*—are caused by equipment being turned on or off within a facility. These surges damage components costing money to repair or replace as well as create unplanned downtime resulting in unfulfilled orders, missed deadlines, unreliable systems and/or dangerous situations....

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Surge Protective Devices SPD2 1P+0 SERIES Class II/Type 2/Type 1 CA Pluggable Single-Pole Pluggable RC Connector Description 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. Visual Life Indicator The surge protection devices for the 1+0 configuration are available for 60 V to 600 V nominal voltage sub-distribution board applications. Features & Benefits FEATURES BENEFITS Capability to clamp and Ensures low-residual...

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Surge Protective Devices SPD2 1P+0 SERIES Module & Base Part Numbering System Module Only Part Numbering System Module Only Maximum Continuous Operating AC Voltage Maximum Continuous Operating AC Voltage Replacement Module Ordering Information Short-Circuit AC Current Rating (ISCCR) Maximum Continuous AC Operating Voltage (MCOV) Voltage Protection Rating (VPR) Nominal Discharge Current (8/20 µs) (In) Short-Circuit Current Rating (SCCR) Voltage Protection Level (Up) Maximum Discharge Current (8/20 µs) (Imax) Ordering Number Nominal AC Voltage (50/60 Hz) (Uo/Un) Nominal Discharge Current (8/20...

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Surge Protective Devices SPD2 2P+0 SERIES Class II/Type 2/Type 1 CA Pluggable Multi-Pole Description 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. Visual Life Indicator The surge protection devices for the 2+0 configuration are available for 120 V to 600 V nominal voltage sub-distribution board applications. Features & Benefits Internal Configuration BENEFITS Capability to clamp and Ensures low-residual voltage during...

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Surge Protective Devices SPD2 2P+0 SERIES Module & Base Part Numbering System Module Only Part Numbering System Module Only Maximum Continuous Operating AC Voltage Maximum Continuous Operating AC Voltage Replacement Module Ordering Information Short-Circuit AC Current Rating (ISCCR) Short-Circuit Current Rating (SCCR) Voltage Protection Level (Up) Nominal Discharge Current (8/20 µs) (In) Maximum Discharge Current (8/20 µs) (Imax) Voltage Protection Rating (VPR) Nominal Discharge Current (8/20 µs) (In) Ordering Number Maximum Continuous AC Operating Voltage (MCOV) Maximum Continuous Operating...

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Surge Protective Devices SPD2 3P+0 SERIES Class II/Type 2/Type 1 CA Pluggable Multi-Pole Description 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. Visual Life Indicator The surge protection devices for the 3+0 configuration are available for 120 V to 600 V nominal voltage sub-distribution board applications. Pluggable RC Connector Features & Benefits FEATURES BENEFITS Capability to clamp and Ensures low-residual...

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Surge Protective Devices SPD2 3P+0 SERIES Module & Base Part Numbering System Module Only Part Numbering System Module Only Maximum Continuous Operating AC Voltage Maximum Continuous Operating AC Voltage Replacement Module Ordering Information Maximum Continuous Operating AC Voltage (Uc) Nominal Discharge Current (8/20 µs) (In) Maximum Discharge Current (8/20 µs) (Imax) Voltage Protection Level (Up) Short-Circuit AC Current Rating (ISCCR) Maximum Continuous AC Operating Voltage (MCOV) Voltage Protection Rating (VPR) Nominal Discharge Current (8/20 µs) (In) Short-Circuit Current Rating (SCCR)...

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Surge Protective Devices SPD2 4P+0 SERIES Class II/Type 2/Type 1 CA Pluggable Multi-Pole Description Visual Life Indicator 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 4+0 configuration are available for 120 V to 480 V nominal voltage sub-distribution board applications. Features & Benefits Internal Configuration L1 BENEFITS Capability to clamp and Ensures low-residual voltage...

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Surge Protective Devices SPD2 4P+0 SERIES Module & Base Part Numbering System Module Only Part Numbering System Module Only Maximum Continuous Operating AC Voltage Maximum Continuous Operating AC Voltage Replacement Module Ordering Information Maximum Continuous Operating AC Voltage (Uc) Nominal Discharge Current (8/20 µs) (In) Maximum Discharge Current (8/20 µs) (Imax) Voltage Protection Level (Up) Short-Circuit AC Current Rating (ISCCR) Maximum Continuous AC Operating Voltage (MCOV) Voltage Protection Rating (VPR) Nominal Discharge Current (8/20 µs) (In) Short-Circuit Current Rating (SCCR)...

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Surge Protective Devices SPD2 1P+1 SERIES Class II/Type 2/Type 1 CA Pluggable Multi-Pole Description 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. Visual Life Indicator The surge protection devices for the 1+1 configuration are available for 60 V to 277 V nominal voltage sub-distribution board applications. Features & Benefits FEATURES Capability to clamp and withstand high-energy transients UL and VDE-IEC compliant...

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SURGE PROTECTIVE DEVICES

SURGE PROTECTIVE DEVICES

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