Siemens Heavy Duty
Safety Switches

Siemens asked contractors for everything they wanted in an enclosed safety switch. Their input helped create the toughest, most reliable, most hassle-free enclosed safety switch in the business – the Siemens Type VBII Safety Switch. It’s a switch that’s right for any commercial, industrial or special use application. The Siemens Safety Switch line offers a list of important features that gives contractors a competitive edge.

Features & Benefits

Heavy Duty Safety Switches are available in 30 - 1,200 Amp ratings and in Type 1, 3R, 12 and 4X enclosures. Both fusible and non-fusible versions are offered. They can be used on circuits that are rated through 200K when protected by or used with Class R or J fuses. They feature quick make and break operation and visible blade construction.

• Defeatable dual cover interlock
• Double break visible blade design
• Front removable line and load lugs which can easily be converted to copper body or compression type lugs
• Highly visible handle and ON/OFF indication
• Innovative magnetic arc suppression incorporated into the line base
• Quick-make and break switching action
• Rugged installer friendly enclosure design
• Door that opens greater than 180º
• Optional viewing windows for "Off" visual confirmation with door closed
• UL listed and specifically designed and tested for use with three separate 600V DC circuits
• 12X overload rating that exceeds industry standard of 10X
• All copper current-carrying parts (except lugs)

These switches feature a time-proven design

Double-break switching action breaks the arc in two places. This reduces heat generation and increases switching speed by doubling the breaking distance. The result is enhanced performance and increased longevity.

We also provide the most visible blade design available today. Unlike conventional knife blade switches, the blades are self-aligning to ensure positive contact. In addition, they have no wear and friction point since the “electrical hinge” has been eliminated.

The result is a very fast, positive and reliable switching action for even the most severe applications.

One tough switch

More rugged and durable in demanding applications Siemens engineers tackled the problem of designing a switch that would stand up under the most demanding industrial conditions, such as those in steel mills and mining operations.

These environments require a switch that must work reliably and safely in the midst of falling liquids, airborne fibers, dust, metal particles, coolants and other contaminants.

Tested and retested

All Siemens safety switches have been tested not only to meet but to exceed all UL requirements.

These tests include those for general purpose enclosed switches and those designed for more specialized purposes where applicable.

The result is a rugged, reliable design that will provide superior performance in a wide variety of applications.