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Siemens NNX3R120 Surge Protective Device

Siemens NNX3R120 Surge Protective Device.

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ManufacturerSiemens

Part numberNNX3R120

Type 1+2

Nominal discharge current (In) 30 kA

Max. continuous operating voltage (Uc) 280 V AC

Rated voltage 230/400 V

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CAGE: 9NK75

Type 1+2 surge protection High discharge capacity (30 kA) Reliable protection against lightning and switching surges Suitable for main power distribution Compact design

Product description

The Siemens NNX3R120 is a Type 1+2 surge protective device designed to safeguard electrical installations from lightning and switching surges. It features a nominal discharge current (In) of 30 kA and a maximum continuous operating voltage (Uc) of 280V AC. This device ensures robust protection for sensitive equipment in various industrial and commercial applications.

Ideal for use in power distribution systems, this surge protective device is crucial for protecting equipment in sectors such as manufacturing, data centers, and building automation. Its advanced technology helps prevent downtime and costly repairs caused by power surges.

As a veteran-owned business, Stanlo Automation is committed to providing reliable surplus industrial parts. We understand the importance of having quality components readily available, and our extensive inventory, including the Siemens NNX3R120, ensures you can find the parts you need to keep your operations running smoothly.

Technical specifications

Type	1+2
Nominal discharge current (In)	30 kA
Max. continuous operating voltage (Uc)	280 V AC
Rated voltage	230/400 V
Protection level	Up to 1.5 kV
Standards	IEC 61643-11, VDE 0675-7

Common applications

Power distribution panels

Industrial facilities

Commercial buildings

Data centers

Renewable energy installations

Machine control systems

Compatible systems

Compatible with standard 230/400V AC power systems.

Also known as

Siemens NNX3R120 SPD Siemens surge arrester

Replaces / compatible with

Designed to replace older or less capable surge protection units, ensuring enhanced safety and reliability for modern electrical systems.

Technical note

Expert tip

Ensure proper grounding and connection according to local electrical codes and manufacturer guidelines for optimal performance and safety.

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Frequently asked questions

What is the maximum continuous operating voltage for the Siemens NNX3R120?

The Siemens NNX3R120 has a maximum continuous operating voltage (Uc) of 280V AC. This specification is crucial for ensuring the device effectively protects against overvoltage without being triggered by normal operating voltage fluctuations.