Siemens 4AM3442-8DN00-0EA0 Transformer

Siemens 4AM3442-8DN00-0EA0 is a 1‑phase SITAS safety isolating transformer that provides a 24 V secondary for low‑voltage control circuits in industrial equipment. It is rated at 0.1 kVA (100 VA) nominal, with a selectable primary voltage range from 550 V down to 208 V (including 525, 500, 480, 460, 440, 415, 400, 380, and 230 V variants), and a 24 V secondary capable of about 4.17 A at 50–60 Hz. The transformer uses a II0 vector group with no shielding winding, is IP00 protected, and has insulation class B with a 40 °C temperature rise. Terminals are screw or tab type, and installation supports screws or DIN rail mounting. It is UL/CSA‑recognized and complies with EN 61558‑2-2, -2-6 as both a control circuit transformer and a safety isolating transformer. Typical applications include supplying isolated power to PLCs, relays, sensors, and other control devices within electrical panels where galvanic isolation and compact, single‑phase design are required.