The Siemens SITAS 4AM4042-4TV00 is a 250VA safety isolating transformer converting 230V primary to 42V secondary at 5.95A. The 42V output is widely specified for handheld industrial tools, portable work lights, and auxiliary circuits where SELV-level safety is required without going down to 24V.

Electrical Characteristics

Built on the EI 96/58 laminated core, it delivers 89% efficiency and an 850VA short-time (S6) rating for handling motor-start and contactor inrush. Primary taps at 218V, 230V, and 242V (±5%) allow adjustment for local supply conditions. The II0 vector group provides galvanic isolation between primary and secondary.

Application Fit

The 42V level bridges the gap between 24V control circuits and 110V/230V power circuits. Common applications include powering portable inspection lamps, handheld power tools in assembly stations, and control panels where 42V auxiliary circuits are specified. The 5.95A secondary current supports multiple simultaneous loads.

Construction & Approvals

IP00 open-frame design, 98×106×118mm, screw or DIN rail mounting. Certified to EN 61558-2-2 and EN 61558-2-6 with CE, cRUus, and EAC approvals. Class B insulation for 40°C ambient.