Siemens 3RH29112FA40 SIRIUS Auxiliary Switch Block 4 NO

The SIRIUS auxiliary switch block 4 NO, also known as an auxiliary contact block or add-on contact block, from Siemens with type number 3RH29112FA40, is an electrical component in switchgear and protection technology for expanding contactors with additional switching contacts. It features four normally open contacts and is designed for front mounting with spring clamp terminals. It is compatible with 3RH and 3RT series contactors. The rated current is 10 A and the rated voltage is 690 VAC. The mechanical durability is 10,000,000 cycles and the electrical durability is 200,000 cycles. Its dimensions are 3.6 x 4.15 x 4.77 cm and its weight is 0.1 kg. Auxiliary switch blocks like this are used in automation technology to extend the functionality of power contactors and generate additional control signals. Typical applications include motor control systems, complex switchgear, and safety circuits, where they serve for status indication or interlocking.

SIRIUS auxiliary switch block with 4 normally open contacts. Designed for front mounting with spring clamp terminals. Compatible with 3RH and 3RT contactors. Offers 10 A rated current and 690 VAC rated voltage. Features a mechanical durability of 10,000,000 cycles and electrical durability of 200,000 cycles