Siemens HF366A Safety Switch – VBII Series – 600A – 3 Pole – 600VAC – Heavy Duty Fusible Disconnect – NEMA 1 Indoor Enclosure

The Siemens HF366A is a VBII Series heavy-duty fusible safety switch designed for high-capacity power distribution, motor control, and service entrance applications in industrial and commercial electrical systems. Rated at 600A and 600VAC, this 3-pole, 3-phase switch provides reliable disconnect functionality and overcurrent protection when used with properly rated fuses.

Built with a rugged steel enclosure in a NEMA Type 1 configuration, the HF366A is intended for indoor installations requiring a durable and dependable switching solution. Its high current capacity and heavy-duty construction make it suitable for demanding electrical distribution environments.

Specifications

• Brand: Siemens
• Part Number: HF366A
• Series: VBII Series
• Type: VBII Fusible Heavy Duty Low Voltage Single Throw
• Category: Safety Switch / Disconnect Switch
• Duty Rating: Heavy Duty
• Fusibility: Fusible
• Contact Configuration: 3PST / TPST
• Enclosure Type: NEMA 1 (Indoor)
• Material: Steel
• Mounting Type: Surface

Electrical Ratings

• Current Rating: 600A
• Voltage Rating: 600VAC
• Frequency Rating: 60 Hz
• Number of Poles: 3 Pole
• Phase: 3 Phase

Motor / Load Ratings

• Horsepower Rating: 200 HP
• Operating Temperature: -29°C to 85°C

Features

• Heavy-duty fusible safety switch
• High-capacity 600A rating for large electrical loads
• 3-pole, 3-phase configuration
• Rugged steel NEMA 1 indoor enclosure
• Surface-mounted design
• Mechanical lug connections
• Reliable manual disconnecting mechanism
• Suitable for industrial power distribution systems
• Designed for long-term operational durability

Construction

• Heavy-duty steel enclosure
• NEMA 1 indoor-rated housing
• Industrial-grade switching mechanism
• Built for high-load electrical applications
• Surface-mounted installation

Applications

• Industrial power distribution systems
• Commercial electrical installations
• Service entrance equipment (indoor use)
• Motor control and protection systems
• HVAC and mechanical equipment disconnects
• Large-scale manufacturing facilities
• Equipment isolation and maintenance safety procedures
• Lockout/Tagout (LOTO) applications

Returns are easy

You may return items within 30 days of delivery for a refund.

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.