SIEMENS
SIEMENS 3RT20161BB41 IEC Magnetic Contactor 24V DC 3P 1NO
Three-pole IEC magnetic contactor with 24 V DC coil, 9 A inductive rating and one normally-open auxiliary contact
- 9 A inductive rating handles motor loads reliably
- 22 A resistive capacity supports heating circuits safely
- 24 V DC coil enables low-voltage control integration
- DIN rail and surface mounting fits compact panels
- 1 NO auxiliary contact provides simple status feedback
SIEMENS SIRIUS 3RT20 IEC Contactor
The SIEMENS 3RT20161BB41 is a three-pole IEC magnetic contactor designed for switching motor loads and other inductive circuits in industrial control panels. It operates on a 24V DC coil and carries a 1NO auxiliary contact for status feedback or interlocking logic. The unit mounts on DIN rail or directly onto a surface and uses screw terminals for secure wiring connections. Frame size S00 suits compact panel layouts where space is limited.
1NO Auxiliary Contact and 24V DC Coil
The single normally-open auxiliary contact adds a monitoring point without requiring a separate accessory block, simplifying the control circuit layout. A 24V DC coil voltage allows direct operation from common PLC outputs or low-voltage DC power supplies found in automation cabinets. Screw terminal connections accept solid or stranded conductors and do not need specialised tooling. The non-reversing design suits straightforward starter applications where direction change is not required.
Check Coil Voltage and Mounting Space
Verify that your control circuit provides a stable 24V DC supply matched to the contactor coil rating before installation. Confirm the panel offers sufficient clearance for the 2.4 in overall height and 1.95 in overall width, including wiring bend radius at the screw terminals. Ensure the DIN rail or mounting surface can accommodate the S00 frame footprint and that the 9 A inductive or 22 A resistive current ratings meet your load requirements.
Highlights
- 9 A inductive rating handles motor loads reliably
- 22 A resistive capacity supports heating circuits safely
- 24 V DC coil enables low-voltage control integration
- DIN rail and surface mounting fits compact panels
- 1 NO auxiliary contact provides simple status feedback
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
Will the screw terminals need periodic retightening under vibration?
The contactor uses screw terminals for power and coil connections; IEC practice recommends checking terminal torque during scheduled maintenance, especially in high-vibration panels.
What is the maximum inductive load the 3-pole main contacts can switch continuously?
The main contacts are rated for 9 A inductive full-load current at the stated coil voltage; sustained operation above this level will cause overheating first.
How much heat does the 24 V DC coil dissipate when the contactor is held energised all day?
The DC coil draws steady power while energised, adding heat inside the enclosure; allow ventilation around the 2.4 in by 1.95 in frame to keep temperatures within IEC limits.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
