Back plate mounting disconnect switch

A rear-of-panel switch-disconnector is a switching and isolating device mounted on a plate inside an electrical panel, providing visible isolation of the upstream and downstream circuits. The SIRCO, SIDER and SIDERMAT ranges cover ratings from 125 to 5000 A, in compliance with the IEC 60947-3 and NF C 15-100 standards, with 3- to 8-pole configurations and front or side controls depending on current rating.

Main ranges and ratings for rear-of-panel switch-disconnectors

SIRCO range and SIDER variants for main distribution

The SIRCO range forms the backbone of our rear-of-panel switch-disconnector offer, with ratings extending from 125 A to 5000 A to cover the full range of power distribution needs. Our installation feedback confirms that the SIDER and SIDERMAT versions specifically meet the requirements of main low-voltage switchboards needing enhanced electrical endurance. Availability in 3, 4, 6 or 8 poles allows each device to be adapted to the structure of the three-phase network or to the management of several sources.

Front and side control layout according to current rating

Small and medium-power switch-disconnectors generally feature front control directly accessible on the panel face. For higher ratings, particularly in the 1000 A to 2500 A range, side control makes integration into confined spaces easier while preserving operating ergonomics. Our installation experience shows that this design choice significantly reduces the usable depth required inside the main LV switchboard.

Advantages of rear-of-panel mounting for switchboards

Space optimisation in main and sub-distribution switchboards

Rear-of-panel plate mounting offers substantial space savings compared with surface-mounted solutions, by integrating the switch-disconnector into the structural volume of the board rather than on its surface. In the field, we find this configuration particularly valued in extensions of industrial sub-distribution boards where available space is limited. Robust plate fixing also provides mechanical resistance to short-circuit stresses.

Accessory compatibility with the FUSERBLOC and SIDERMAT ranges

Position auxiliary contacts, upstream/downstream terminal shields and other spare parts are common to the FUSERBLOC and SIDERMAT ranges. Our standard practice favours this standardisation, as it considerably simplifies spare-parts stock management for installers maintaining several types of switchboard. Insulating-material terminal shields, available for ratings from 1000 A to 2500 A, reinforce safety during connection work.

Materials, finishes and regulatory compliance

Mechanical construction and connection ranges of switch-disconnectors

The device body is made of reinforced polyamide, offering resistance to mechanical impacts and to operating temperatures inside a closed panel. Silver-plated copper connection ranges ensure optimum conductivity and limit heating at connection points. We systematically recommend checking tightening torque during commissioning to preserve these characteristics over time.

IEC 60947-3 certification and application of NF C 15-100

Compliance with the IEC 60947-3 standard guarantees the switching capacity and on-load isolation performance of rear-of-panel switch-disconnectors. In France, application of NF C 15-100 requires their use in main low-voltage switchboards to ensure personal safety and service continuity. Feedback from design offices confirms that this dual regulatory reference makes it easier for compliance files to be accepted.

Frequently asked questions

What is the difference between a rear-of-panel switch-disconnector and a surface-mounted one?

The rear-of-panel switch-disconnector is fixed to a plate inside the board, optimising front-face space, whereas the surface-mounted version projects from the front face and occupies volume outside the panel. The choice depends on available depth and the accessibility required for operation.

Which ratings of rear-of-panel switch-disconnector require terminal shields as standard?

Upstream/downstream terminal shields are specifically recommended for ratings from 1000 A to 2500 A, where isolation distance and the risk of arc flash during interventions justify enhanced protection for maintenance staff.

Can the same auxiliary contacts be used on a rear-of-panel SIRCO and a FUSERBLOC?

Yes, accessory compatibility across the SIRCO, SIDERMAT and FUSERBLOC ranges allows the same position auxiliary contact references to be used, standardising stock and simplifying preventive maintenance of switchboard fleets.

Which standard precisely defines the switching performance of a switch-disconnector?

The IEC 60947-3 standard sets out the requirements for switches, disconnectors and switch-disconnectors, including their making and breaking capacities, short-circuit withstand characteristics and validation test conditions.