Modular disconnect switch

A modular switch-disconnector is a manually operated switching device that simultaneously opens an electrical circuit and provides visible isolation of live parts. The SIRCO M and SIRCO MV ranges offer ratings from 16 to 160 A with DIN-rail mounting in 3 or 4 poles. These devices comply with IEC 60947-3 and are used at the head of sub-distribution boards, for emergency switching or at generator outputs.

Switching functions and available ranges for the modular switch-disconnector

Fully visible break with the SIRCO M range

The SIRCO M range covers ratings from 16 to 125 A and provides a fully visible break in line with the requirements of NF C 15-100. We recommend this range for standard sub-distribution circuits and network-coupling applications where visibility of contact status is not imposed by regulatory context. Direct rotary control allows fast, intuitive operation inside the panel.

Enhanced visible break with the SIRCO MV range

The SIRCO MV range, available in 100, 125 and 160 A, provides a visible break that adds an extra level of safety required by NF C 15-100 at the head of the panel, on safety circuits and in hazardous areas. Our installation experience confirms that this function is systematically required by design offices for tertiary and industrial installations subject to frequent maintenance constraints.

Technical configuration and mounting options

Control and accessory modularity

A single bare device forms the reference base, complemented by a wide range of accessories that adapt control and signalling without changing the base reference. Handles available in blue, red or black polycarbonate, depending on function, make visual identification of roles easier. In the field, we observe that this modularity significantly reduces spare-parts stock at installers.

Control modes and neutral-pole positioning

Control is by direct rotary operation or remotely via front, left-side or right-side options. The neutral or PE pole can be configured as uncut depending on installation needs. Pre-break auxiliary contacts and type-M signalling contacts allow the modular switch-disconnector to be interfaced with control relays or supervision systems.

Panel integration on DIN rail or on the door

Fast mounting on DIN rail is the standard method, while a dedicated kit allows installation on the panel door. Our standard practice favours door mounting for emergency switching stations where the operator must access the control immediately without opening the panel.

Materials, compliance and typical applications

Material composition and durability

The reinforced polyamide body provides mechanical resistance to impacts and thermal stresses inside the panel. Silver-plated copper contacts ensure electrical conductivity and limit oxidation over the device's service life. This composition allows us to validate their use in distribution panels exposed to high ambient temperatures.

Applicable certifications and standards

The SIRCO M and SIRCO MV ranges comply with the IEC 60947-3 standard for switches, disconnectors and switch-disconnectors. The UL508 and UL98 certifications, depending on reference, allow their integration into equipment exported to or subject to North American requirements. Our installation feedback shows that dual IEC/UL certification makes it easier for panels to be approved by international certification bodies.

Common usage situations in electrical installations

At the head of a sub-distribution board, the modular switch-disconnector provides protection and isolation for the outgoing circuit. For emergency switching, it allows immediate manual shutdown of the supply. Generator output and network coupling are applications where the robustness of the isolation ensures operator safety during source transfers.

Frequently asked questions

What is the difference between a fully visible break and a visible break?

The fully visible break, provided by the SIRCO M range, guarantees contact opening through the position of the control without direct visibility of live parts. The visible break of the SIRCO MV range allows the physical gap between contacts to be observed, which NF C 15-100 requires at the head of the panel and in hazardous areas.

Can the neutral pole remain permanently connected on a modular switch-disconnector?

Yes, the SIRCO M and SIRCO MV ranges offer a configuration where the neutral or PE pole is not switched. This option is particularly useful in installations where continuity of the protective conductor must be maintained regardless of the device's state.

Which accessories turn a bare device into a complete solution?

Colour-coded handles, extension shafts for external control, pre-break and type-M signalling auxiliary contacts, and door-mounting kits complete the bare device without changing the base reference.

Are the SIRCO M and MV ranges compatible with UL requirements?

Some references in the SIRCO M and SIRCO MV ranges hold UL508 and UL98 certifications. This compliance must be checked reference by reference in the technical documentation, as it depends on the control options and the rating selected.

When should door mounting be preferred over DIN-rail mounting?

Door mounting is recommended for emergency switching functions where access to the control must be immediate without opening the panel. DIN rail remains the standard solution for sub-distribution circuits inside the panel.