The 3SB3500-2KA41 is a single-pole contact block from Siemens. This contact block can be used for breaking, making, or breaking and making circuits in a range of electrical applications. It features one N.O. (normally open) contact, an LED indication, and horizontal or vertical mounting. The contact block is made of plastic and metal, and has a rated voltage of 24 V and a current rating of 5 A. It meets the requirements of UL, CSA, and IEC standards and has an IP20 degree of protection. The contact block is suitable for use with the 3SB3 series contactors and 3SB2 Series pushbuttons.