Square D - DU323 General Duty Safety Switch, Steel, Small, Non-Fusible, 100-Amp, 240V, 3-Pole, Indoor

Performance

The useful life of a safety switch is less than two years based on NEMA KS-1 life test requirements, in lockout/tag out applications where a switch is operated just once per hour, 24 hours a day, seven days a week. Square D safety switches provide significantly higher levels of mechanical endurance than NEMA KS-1 require. This translates to improved reliability in a production environment. In fact, the standard for the design life of Square D F-Series safety switches is a minimum of three times the NEMA requirement.

A key performance benefit of the Square D safety switch is its ability to break load. A locked motor can draw six to eight times motor full-load current. In an emergency, it is important to have a switch with enhanced load break capability. A key element of Square D safety switches in their blade and jaw construction designs built to easily manage heavy motor loads and arc interruptions.

Quality

Square D safety switches are, above else, built to increase safety. Our switch blades are easily visible, even in poor lighting conditions. In addition, the design of the Square D safety switch includes an oversized arc suppressor, a key feature in the ability of the switch to break the load by effectively attenuating the arc for clean interruption.

Galvannealed steel in all single-throw Type 3R and 12 enclosures provides superior corrosion protection. Type 4X seam-welded enclosures help extend equipment life by providing excellent environmental and corrosion protection without the use of a silicone sealer.

Managing temperatures inside the switch is essential to providing greater service life. Square D safety switches feature more copper than other switches available on the market today, which is one of the reasons there is lower operating temperatures. The enclosed operating mechanism design also reduces the amount of dust and other contaminates that shorten operating life.