How do I install the arc fault detection device (AFDD)?

The arc fault detection devices (AFDD) are part of the integrated SENTRON portfolio from Siemens. In addition to the innovative 5SV6 versions, the product series also includes the proven 5SM6 arc fault detection unit. It is available in two widths for mounting on either miniature circuit breakers (MCBs) or RCBOs. Combining the SENTRON arc fault detection device with the SENTRON 5SV1 RCBO enables comprehensive protection in just two instead of three modular widths.

How does Siemens’ patented SIARC detection technology work?

The SENTRON arc fault detection devices (AFDD) are based on the patented SIARC technology: The detection methodology developed by Siemens continuously measures the high-frequency noise of voltage and current in terms of their intensity and duration and the gaps between them. Integrated filters with intelligent software analyze the signals. If anything unusual is detected, the circuit is disconnected within fractions of a second. SIARC can reliably distinguish harmless causes of faults such as those generated by drills or vacuum cleaners from dangerous fault arcs.

SENTRON arc fault detection devices (AFDD)

Why SENTRON AFDD?

The compact SENTRON arc fault detection device detects any type of arc fault and disconnects the circuit immediately – essential for an all-round protected electrical installation.

SENTRON AFDD is suitable for new buildings and installations, as well as retrofitting and modernizing existing industrial, residential or commercial buildings.

These devices can detect parallel and serial arc faults, interrupt and disconnect circuits and replace existing MCBs or attach to SENTRON MCBs or RCBOs and feature:

Compact design with only one modular width (MW)
50% space savings in the distribution board for new installations
Two SENTRON series for arc detection: 5SV6 and 5SM6
Siemens-patented SIARC technology

AFDD switches – explained simply

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Reduce risk of electrical fire

Minimize the risks associated with modern electrical devices and increased current load, including electrical fire, even from minor defects such as damaged wire insulation, crushed cables or bent connectors.

Protect people and assets

Enable early detection of fire hazards, from the electrical line to the end device, and prevent other dangers such as electric shock or electrical system destruction in residential, commercial or industrial settings.

Maximize space savings

Replace existing circuit breakers in older buildings without adding space. AFDD features an integrated miniature circuit breaker (MCB) and has the same width as an MCB for maximum space savings on the distribution board.

Featured capabilities

Electrical arc between two exposed wire ends

Prevent electrical fires with patented arc detection

Detect dangerous fault arcs with patented SIARC technology. Developed by Siemens to filter and analyze signals with intelligent software, it detects unusual activity and disconnects the circuit in fractions of a second.

Technician inspecting and connecting wiring inside an electrical cabinet

Achieve space savings with compact design

Reduce panel space while maintaining comprehensive protection. The integrated AFDD/MCB design is easily installable in new buildings and features straight-forward retrofitting in existing buildings.

A map showing various international standards according to low voltage power distribution

Support standard-compliance and portfolio integration

Meet IEC 60364-4-42 safety guidance with devices that integrate seamlessly across the SENTRON portfolio. Combine AFDDs with MCBs or RCBOs, including SENTRON 5SV6 & 5SM6, to deliver standard-compliant, coordinated protection.

Discover how others use the SENTRON AFDD

Wolfgang Burst

Energy monitoring in a KNX Smart Home

Austria

In Wolfgang Burst’s smart home, SENTRON AFDDs show how a modern electrical installation combines safety and energy efficiency while remaining compact, reliable, and future-ready.

Rexel

AFDD protection in REXEL Austria logistics center

Austria

At the REXEL Austria logistics center, SENTRON AFDDs demonstrate how modern electrical installations reliably protect against electrical arc faults and support operational safety in large-scale facilities.

Discover how others use SENTRON AFDD

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SENTRON AFDD in woodworking

In woodworking – and in many other industries – loose cables and connections as well as short circuits can cause parallel arcing faults. SENTRON AFDDs can provide comprehensive protection against electrically ignited fires.

Frequently asked questions

Explore resources and related products

Downloads

Order support | SENTRON 5SV6 AFDD/MCB

White paper | The changing world of building electrical systems

Catalog | LV10 – Low-voltage power distribution and electrical installation technology

Tender specifications