DC Coil Contactor for 72–125 VDC Control Circuits
The Siemens 3RT2016-2XF42-0LA2 is a SIRIUS size S00 contactor with a DC coil rated for 72–125 VDC, making it a direct fit for control panels running on nominal 110 VDC or 125 VDC battery-backed supplies. The coil draws a 1.1 A inrush peak and holds with spring-type terminals — no separate coil suppression network needed on the terminal block. Switching currents are specified per voltage: at 24 VDC it handles 10 A, at 48 VDC 2 A, at 110 VDC 1 A, at 125 VDC 0.9 A, at 220 VDC 0.3 A, and at 400 VDC 3 A. The 480 VDC rating reaches 7.6 A, and at 600 VDC it delivers 9 A. Main contact rating is 20–12 (likely AC-3/AC-4), with a typical mechanical life of 30 million operations and a maximum AC-4 switching rate of 250 operations per hour.
Solid wire sizes accepted: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), 2x 4 mm², or 2x (0.5–4 mm²) for solid or stranded.
Environmental and Timing
The full-scale value is 1.25 and initial value 0.7 — these likely relate to coil holding margin or thermal derating.