Siemens 3TJ1112-0AD0 8-Pole Control Relay 42VAC

Siemens 3TJ1112-0AD0 is an eight-pole control relay with a 42 VAC coil, offered here as new-old-stock. This legacy device comes from Siemens’ 3TJ1 family and consolidates eight switching contacts within a single relay body, enabling multi‑circuit control driven by a single actuator. The 42 VAC coil rating specifies the electrical drive required to energize the unit, aligning with low‑voltage control circuits found in older Siemens automation schemes. The 3TJ1112-0AD0 model designation identifies the exact variant in Siemens’ catalog, and it is used in legacy installations that relied on the 3TJ1 relay lineage. With NOS condition, it provides a practical option for technicians maintaining or stocking spare parts for equipment originally specified this model, supporting long‑term availability for repairing established control panels and machinery. Its compact, multi‑pole form factor helps streamline wiring and panel layout in complex control schemes where multiple control paths need to be actuated from a single relay device.