Siemens SN423 Disconnect Switch, 100A, 3-Pole, 240V

Designed for rugged industrial environments, the Siemens SN423 Disconnect Switch delivers dependable isolation for electrical service, maintenance, and replacement projects. With a 100 A rating, 3 poles, and a 240 V operating range, this switch is engineered to handle demanding workloads while keeping crews safe during service work. Use the part number SN423 to confirm compatibility with your application and control scheme.

What makes the SN423 unique

The SN423 features a three-pole configuration that provides complete isolation of all active conductors in a three-phase system, simplifying maintenance and reducing downtime. Built by Siemens, this disconnect switch is designed for reliable performance in panels, enclosures, and industrial distribution setups where a dedicated, code-compliant disconnect is essential.

Key specifications

• Manufacturer: Siemens
• Part Number: SN423
• Product Type: Disconnect Switch
• Amperage: 100 A
• Poles: 3
• Voltage: 240 V

Ideal applications

• Main service disconnects for equipment rooms and electrical panels
• Maintenance isolation for motors, transformers, and control circuits
• Replacement in existing installations where SN423 is the compatible part number

Compatibility & support

Verify fit by the part number and your specific application requirements. If you need help matching a part number or confirming compatibility, message us and we’ll assist you in validating this SN423 disconnect switch for your project.

Practical guidance for use

• Ensure power is isolated before installation or service work, following your facility’s safety procedures and local electrical codes.
• Use the SN423 in environments that require reliable, three-phase isolation at 240 V with a 100 A current rating.
• Plan for straightforward replacement in legacy systems by cross-referencing SN423 with your existing panel and wiring configuration.