SIEMENS
SIEMENS 3RT20151BB42 IEC Magnetic Contactor 24V DC 3P 1NC
IEC magnetic contactor with 24 V DC coil, three poles and one normally-closed auxiliary contact, rated 7 A inductive and 18 A resistive load
- IEC-compliant switching for reliable motor control
- 24 V DC coil suits low-voltage control circuits
- Three power poles handle 7 A inductive loads
- Compact 45 mm width fits dense DIN-rail layouts
- 1 NC auxiliary contact enables status feedback
SIEMENS SIRIUS 3RT20 IEC Contactor
This SIEMENS SIRIUS 3RT20 series contactor is a non-reversing IEC magnetic starter designed for controlling motor loads and power circuits in industrial machinery. It mounts on a DIN rail or surface and uses screw terminals for secure wiring connections. The unit arrives new and is built to IEC standards for reliable switching performance.
24V DC Coil with 1NC Auxiliary Contact
The contactor operates on a 24V DC coil voltage and provides three main power poles for three-phase applications. It includes one normally closed auxiliary contact for control circuit interlocking or status indication. The frame size is S00 with overall dimensions of 2.45 in height and 1.6 in width.
7 A Inductive and 18 A Resistive Ratings
Under sustained load the contactor handles a full load inductive current of 7 A and a resistive current of 18 A. These ratings define the continuous thermal capacity for the main contacts during extended operation. The non-reversing design suits single-direction motor control without added complexity.
Highlights
- IEC-compliant switching for reliable motor control
- 24 V DC coil suits low-voltage control circuits
- Three power poles handle 7 A inductive loads
- Compact 45 mm width fits dense DIN-rail layouts
- 1 NC auxiliary contact enables status feedback
Specifications
| Brand | SIEMENS |
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Questions about this item
How does the 7 A inductive full-load current affect what motors or loads I can switch with this contactor?
The 7 A inductive rating means the contactor can reliably switch three-phase motors or other inductive loads drawing up to 7 amperes at the rated voltage without excessive contact wear.
What does the 24 V DC coil voltage imply for the control circuit and power supply I must provide?
The coil requires a 24 V DC source; the control circuit must supply that voltage and enough current to pull in and hold the coil, so a compatible DC power supply or PLC output rated for 24 V DC is needed.
What physical space and mounting hardware does the S00 frame with 1.6 in width and 2.45 in height need inside my enclosure?
The contactor occupies a footprint of 1.6 inches wide by 2.45 inches high and mounts on DIN rail or directly on a panel using screw terminals for secure installation.
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