What this SIRIUS coupling contactor is for
The Siemens 3RT2016-1JB41-ZX95 is a SIRIUS coupling contactor in size S00, designed for switching DC loads in control circuits — typically interposing between a PLC output and a higher-power contactor coil, or switching DC solenoids and brake coils. The 24 V DC coil pulls in at 0.7 × rated voltage (about 16.8 V) and drops out between 38 and 65 ms after coil power is removed, which is a deliberate delay for sequenced shutdowns. Arcing time runs 10 to 15 ms, so the DC load break is clean within that window.
The DC-13 switching capacity is the key selection figure for this contactor: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, and 3 A at 400 V. DC-13 is the inductive load category (solenoids, contactor coils, electromagnetic brakes), so these are not resistive ratings — the contactor is built to handle the arc of breaking a DC inductive circuit. The 1 hp rating at 230 V AC is a secondary AC motor switching capability, but the part's primary role is DC coupling.
Mounting and clearances for panel integration
Screw-type terminals on the coil and main contacts accept solid or stranded wire from 0.5 to 4 mm², and can double up two conductors per terminal (2 × 0.5–1.5 mm², 2 × 0.75–2.5 mm², or 2 × 4 mm²).