Siemens HF363S - 100A, 600V, 3-Pole, Heavy-Duty, Safety Switch, NEMA 4X

Meet the Siemens HF363S, a rugged 3-pole safety switch built to deliver reliable on/off isolation and overcurrent protection in tough industrial and commercial settings. Rated for 100A at 600V, this NEMA 4X device is designed to withstand moisture, dust, and wash-down environments, making it a trusted choice for motor disconnects and main protection in demanding facilities.

• Model: HF363S
• Current rating: 100A
• Voltage: 600V
• Poles: 3-Pole
• NEMA rating: 4X
• Duty: Heavy

Why this matters

• Three-pole design provides complete isolation for three-phase motors, reducing risk during maintenance and startup.
• NEMA 4X enclosure offers superior protection against water, dust, and corrosive environments, enabling outdoor or wash-down locations without compromising safety.
• Rugged construction and straightforward maintenance help minimize downtime in high-demand applications such as conveyors, pumps, and CNC machines.

Ideal use cases

• Motor disconnects on manufacturing lines and processing equipment
• Panelboard protection and branch circuit protection in rugged spaces
• Outdoor or damp locations where reliable weather resistance is essential

How it helps your operation

The HF363S gives you confidence that critical equipment can be isolated quickly and safely, with durable performance that reduces unplanned outages. Its compact footprint makes it easier to fit into existing control panels without sacrificing protection or accessibility. For technicians, the straightforward on/off action simplifies lockout/tagout procedures and routine inspections.

Specifications at a glance

• Model: HF363S
• Amperage: 100A
• Voltage: 600V
• Poles: 3
• NEMA: 4X
• Duty: Heavy