Surge Protective Device Schneider Electric SCTO92IX Type 2, 3-phase, 40 kA

Schneider Electric SCTO92IX Type 2 surge protective device is designed for three-phase electrical installations requiring coordinated protection against transient overvoltages. With a nominal discharge capacity of 40 kA, this SPD diverts surge currents away from connected equipment and toward ground, helping maintain continuity of power distribution in commercial and industrial panels. The device is intended to be installed at distribution boards where Type 2 protection is required to limit residual overvoltage following upstream suppression and to protect downstream circuits and sensitive electronics.

Advantages

The SCTO92IX provides targeted suppression of transient overvoltages in three-phase systems while offering a compact footprint suitable for standard distribution panels. Its 40 kA nominal discharge capability is intended to handle substantial transient events, reducing the risk of damage to downstream equipment and limiting system downtime. The unit supports coordinated protection strategies when combined with upstream and downstream SPDs, and its design is compatible with typical installation methods used in commercial and industrial environments.

Suitable for

• Three-phase commercial and industrial distribution boards
• Protection of sensitive electronics and control systems from transient overvoltages
• Installation where Type 2 surge protection is specified by wiring regulations

Key specifications

• Surge protection type: Type 2 (intermediate protection for distribution boards)
• Phase system: Three-phase
• Nominal discharge current (In): 40 kA
• Application: Protection against transient overvoltages for downstream equipment

How to use

Install the SCTO92IX on the incoming side of the distribution board or in accordance with the installation scheme required by the electrical design. Connection should be performed by a qualified electrician with the supply removed and following local wiring regulations and safety practices. Ensure proper grounding/earthing of the installation so surge currents are safely diverted to earth. Verify that the device is compatible with the system voltage and the overall surge protection coordination plan before final connection.

Recommendations

Regularly inspect the SPD’s status indicators (if present) and include the device in routine electrical maintenance checks. Replace the unit according to manufacturer guidance or if end-of-life indicators show the device is no longer operational. Coordinate the SCTO92IX with upstream and downstream protection measures for optimal performance in three-phase installations.