Product Specifications
| Product Attribute | Attribute Value |
| The Siemens Size S2 contactors have an auxiliary contact integrated in the basic unit. The basic units size S2 contain two integrated auxiliary contacts (1 NO + 1 NC). All basic units can be expanded with auxiliary switch blocks. For size S2 and higher, complete units with 2 NO + 2 NC are available (terminal designation according to EN 50012). The auxiliary switch block can be removed and a maximum of 4 additional auxiliary contacts can be attached. 3RU21 thermal overload relays or 3RB30 solid-state overload relays can be fitted to the 3RT2 contactors for protection against overload. Technical Specifications 3RT2037 contactors are finger-safe according to EN 50274. The devices with ring terminal lug connection comply with degree of protection IP20 when fitted with the related terminal cover. All contactors of size S2 with two auxiliary contacts (1 N.O. and 1 N.C.) and the contactors with 4 main contacts can be expanded into contactors with 2 to 5 auxiliary contacts using auxiliary switch blocks with the identification numbers 40 to 04. |
