What This Contactor Is and Where It Fits
The Siemens SIRIUS 3RT1016-1JB41-ZX95 is a Size S00 power contactor with a 24 V DC coil and one normally open instantaneous contact. It mounts via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 50022, so it drops into any standard panel rail. The coil draws 2.3 W both on closing and holding, so the power supply budget is predictable — no inrush spike to size around. The built-in surge suppressor uses a diode, which means polarity matters: verify the DC supply orientation before wiring.
Key Ratings and What They Mean for Your Load
For motor switching in AC-3 duty, this contactor is rated 4.5 kW at 500 V and 5.5 kW at 690 V. At 400 V AC-2 it handles 4 kW, and in AC-4 (frequent reversing or inching) it carries 8.5 A at 400 V. That makes it a solid fit for small to mid-size three-phase motors — think pumps, fans, and conveyors up to about 5.5 kW. The main contact is rated 10 A in AC-12 (resistive loads) and 10 A at 24 V DC. The auxiliary contact ratings drop with voltage: 2 A at 60 V DC, 1 A at 110 V DC, 0.3 A at 220 V DC. If you're switching a DC control circuit, watch the voltage curve — the 24 V rating is generous, but at 220 V you're limited to 0.3 A. Short-circuit protection: with type 2 coordination (no welding on fault), use a gL/gG fuse rated 20 A. With type 1 coordination (device may be damaged), a 35 A fuse is allowed. This matters when you're coordinating with upstream protection in a motor control center.
Mounting and Wiring Details
The contactor is 45 mm wide, 57.5 mm tall, and 72 mm deep — a compact footprint for Size S00. Side-by-side mounting is allowed, so you can pack multiple units on a rail without derating for heat buildup, as long as ambient stays within -25 to +60 °C during operation. Main circuit terminals are screw-type, accepting solid or stranded wire: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²). AWG equivalents are 2x (20 to 16), 2x (18 to 14), or 1x 12. That covers most panel wiring up to 4 mm² without needing ferrules, though ferruled stranded is fine. Front and terminal protection is IP20. Maximum operating altitude is 2,000 m.