5SD7413-1 Siemens

What does this device do?

It is a Type 1 surge protection device (lightning arrester) designed to divert high-energy surge currents (including lightning impulse currents) away from the electrical installation, helping to limit overvoltage at the incoming supply.

Which type of power system is it intended for?

It is intended for TN-C distribution systems and uses an L–PEN protective path arrangement suitable for that earthing concept.

What does “Type 1 / Test Class I” mean in practical terms?

Type 1 (Test Class I) indicates the device is tested for high-energy lightning impulse currents (10/350 µs) and is typically installed at the service entrance or main distribution board where lightning currents may enter the installation.

Can it also cover Type 2 surge protection requirements?

Yes. In addition to being Type 1, it is also classified as Type 2 (Test Class II), which means it also addresses standard surge currents (8/20 µs). Many installations still use additional downstream Type 2/Type 3 protection depending on equipment sensitivity and cable lengths.

What is the continuous operating voltage (Uc) and why does it matter?

Uc is 350 V. It indicates the maximum RMS voltage the SPD can be continuously exposed to without operating; selecting the correct Uc helps avoid unwanted operation during normal mains variations while still providing effective protection during surges.

What are the key surge current ratings?

Key ratings include total lightning impulse current Iimp (10/350 µs) of 75 kA, lightning current peak value (10/350 µs) of 25 kA, and discharge current In (8/20 µs) of 25 kA (with up to 50 kA per phase at 8/20 µs as specified).

What protection level (Up) does it provide?

The maximum protection level Up is 1.5 kV, and the residual voltage at rated discharge current is specified up to 1.5 kV. This indicates the voltage that may remain at the terminals during a surge event.

How fast does it respond to a surge?

The response time is specified as 100 ns, supporting fast limitation of transient overvoltages.

Is it a single module or a multi-pole device?

It is a 3-pole, pluggable protective module design (3+0 circuit). This arrangement is commonly used for TN-C systems where protection is provided between line conductors and PEN.

Does it include local status indication?

Yes. It provides optical indication on the device to show status, allowing quick visual checks during inspections.

Can it provide remote indication to a monitoring system?

Yes. It includes a remote signalling contact with PDT (changeover) switching function, suitable for integration into alarm or building monitoring circuits.

What are the remote signalling contact electrical ratings?

For AC, the remote signalling contact operating voltage range is 12 to 250 V, with operational current from 10 mA up to 1 A (per the specification).

What conductor sizes can be connected to the power terminals?

The power terminals accept 2.5 to 35 mm² for rigid conductors and 2.5 to 25 mm² for finely stranded conductors.

What conductor sizes can be connected to the remote signalling terminals?

Remote signalling terminals accept 0.14 to 1.5 mm² for both rigid and finely stranded conductors.

What type of terminals are used and what are typical installation details?

It uses screw terminals. The main conductor strip length is 18 mm, and the connection screw thread is M5. The specified tightening torque range for the main terminals is 4.3 to 4.7 N·m.

How is it mounted in a panel?

It is designed for DIN rail mounting on NS 35 rail, which is standard for most distribution boards and control panels.

What space does it take up in a distribution board?

The device size is specified as 6 MW, with overall dimensions of approximately 106.8 mm (W) × 94.8 mm (H) × 71.1 mm (D).

What is the ingress protection rating at the terminals?

With all terminals connected, the terminal area is rated IP20, meaning it is protected against finger contact but not against water ingress.

Are there upstream fuse recommendations?

Yes. The specification lists fuse protection of 125 A AC (gG) for a V-shaped connection and 315 A AC (gG) for a T-connector arrangement. Always ensure coordination with the installation design and applicable regulations.

What short-circuit capability does it have?

The short-circuit rating (SCCR) is specified as 50 kA at 264 V, indicating the maximum prospective short-circuit current the device assembly can withstand under defined conditions.

How does it behave under temporary overvoltage (TOV) conditions?

Its TOV behaviour is specified at 415 V AC for 5 seconds (withstand mode) and 457 V AC for 120 minutes (withstand mode), helping it tolerate certain temporary mains overvoltage events without immediate disconnection.

What standards is it built and tested to?

It is specified to IEC 61643-11:2011 and EN 61643-11:2012 for surge protective devices.

What environmental conditions is it designed for in typical indoor panels?

It is specified for pollution degree 2, relative humidity from 5% to 95% during operation, and installation altitude up to 2,000 m, which aligns with many indoor switchboard environments.

Are the protective modules replaceable?

Yes. The design uses pluggable protective modules, allowing replacement of the module(s) when indicated, without replacing the entire base assembly.

Are any accessories associated with this device?

The specification references accessories as 3 × 5SD7418-1. If you need confirmation of compatibility for a specific panel layout, share your configuration details and we can help you verify the correct matching items.

What is the typical application location within an installation?

It is typically installed at the origin of the installation (incoming supply, main LV distribution board, or service entrance) where the highest surge energy is expected, especially in buildings with external lightning protection systems or overhead supplies.

Can it be used on a 230 V system?

Yes. The operating voltage is specified as 230 V, with Uc 350 V to accommodate normal mains conditions while providing surge diversion capability.

How should I interpret the “3+0” circuit description?

“3+0” generally indicates protection paths for three line conductors to PEN (rather than line-to-neutral plus neutral-to-earth). This aligns with TN-C systems where neutral and protective earth are combined as PEN.