SIEMENS
SIEMENS 3RT20181AP61 IEC Magnetic Contactor 1NO 220-240V AC 3P
IEC magnetic contactor with 1NO auxiliary contact, 220-240V AC coil, 3 poles, 16A inductive and 22A resistive ratings, DIN-rail or surface mount in S00 frame
- 16 A inductive rating for reliable motor switching
- 22 A resistive capacity handles heating loads
- 220-240 V AC coil matches common control voltages
- 3-pole main circuit plus 1 NO auxiliary simplifies wiring
- DIN-rail or surface mount fits S00 frame panels
IEC Magnetic Contactor 3P 16A
The SIEMENS 3RT20181AP61 is a three-pole IEC magnetic contactor rated for 16 amps inductive and 22 amps resistive load. It operates on a 220 to 240 volt AC coil and includes one normally open auxiliary contact. The unit belongs to the SIRIUS 3RT20 series with frame size S00.
Sustained load behaviour
The contactor handles continuous inductive loads up to 16 amps and resistive loads up to 22 amps without derating. Its non-reversing design suits motor-starting and heating circuits where the coil remains energised for long periods. The 3-pole main circuit switches all three phases simultaneously.
Installation and common issues
Mounting options include DIN rail or surface mounting using screw terminals for all connections. Overall dimensions are 2.4 inches high by 1.95 inches wide. The open-frame construction has no NEMA enclosure rating, so installers must provide a suitable cabinet. Wiring must match the screw-terminal layout to avoid loose connections.
Highlights
- 16 A inductive rating for reliable motor switching
- 22 A resistive capacity handles heating loads
- 220-240 V AC coil matches common control voltages
- 3-pole main circuit plus 1 NO auxiliary simplifies wiring
- DIN-rail or surface mount fits S00 frame panels
Specifications
| Brand | SIEMENS |
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Questions about this item
How much heat and power draw should I expect from the 3-pole 220-240 V AC coil when the contactor runs continuously?
The coil is rated for 220-240 V AC operation; the main contacts carry up to 16 A inductive or 22 A resistive load, so heat scales with the actual load current you switch.
Which auxiliary contact block or control wiring do I already need to have for the 1NO built-in contact to be useful in my circuit?
The contactor includes one normally-open auxiliary contact rated for the same coil voltage; you only need control wiring and a 220-240 V AC supply to drive the coil.
Will the S00 frame size and screw terminals fit the DIN-rail layout and wire gauges I already use for older IEC starters?
The unit uses an S00 frame measuring 2.4 in high by 1.95 in wide with screw terminals, matching standard DIN-rail mounting and common wire sizes for this frame class.
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