Square D offers a fusible panelboard called a QMB panelboard which is perfect for use when specifications or electrical codes called for a fusible panelboard. QMB family offers a unbeatable performance, time-saving installation features and its reliabilty make it the product of choice for large commercial and industrial applications. QMB fusible panelboards are designed, manufactured, tested for AC and DC systems and meet UL, CSA standards and satisfy NEC codes. This is a QMB fusible disconnect is a 3-pole device rated at 30A and has a voltage of 600 VAC. This device cover two modules and uses a class R fuse and has a height of 4.5 inches tall. The unit type is twin switch.