SIEMENS
SIEMENS 3RT20251AK60 Contactor 1NC/1NO 110-120V AC 3P
IEC magnetic contactor with 1NO/1NC auxiliary contacts, 110-120V AC coil, three poles, 17A inductive and 40A resistive ratings, DIN-rail or surface mounting in S0 frame
- Reliable motor switching with 17 A inductive full-load current
- Handles resistive loads up to 40 A for heating circuits
- Compact 3.55 in height fits tight panel space
- Mounts on DIN rail or flat surface for flexible installation
- SIRIUS 3RT20 series quality from Siemens for industrial durability
SIEMENS SIRIUS 3RT20 Contactor
The SIEMENS 3RT20251AK60 is an IEC magnetic contactor designed for motor-starting and power-switching duties in industrial control panels. It suits electricians and panel builders who need a compact, DIN-rail-mountable device for three-phase loads up to 17 A inductive or 40 A resistive.
Screw terminals and DIN-rail mounting
The unit uses screw terminals for secure conductor termination and mounts on standard DIN rail or directly on a surface. Its 3.55 in height and 2.1 in width fit tight panel layouts, while the open-frame construction with no enclosure rating means it must be installed inside a suitable cabinet for protection.
Non-reversing three-pole switching
This contactor provides non-reversing control of three poles with a 110-120 V AC coil and two built-in auxiliary contacts (1 NO / 1 NC). It replaces older IEC starters of the same frame size when the application does not require reversing function or a higher inductive-current rating.
Highlights
- Reliable motor switching with 17 A inductive full-load current
- Handles resistive loads up to 40 A for heating circuits
- Compact 3.55 in height fits tight panel space
- Mounts on DIN rail or flat surface for flexible installation
- SIRIUS 3RT20 series quality from Siemens for industrial durability
Specifications
| Brand | SIEMENS |
|---|
Questions about this item
What coil voltage does the 3RT20251AK60 contactor require for operation?
The coil operates on 110/120V AC, so the control circuit must supply that voltage range for reliable pickup and hold-in.
What mounting options and physical space does the SIRIUS 3RT20 frame S0 contactor need?
It mounts on a standard DIN rail or directly on a surface, measuring 3.55 in high by 2.1 in wide; allow clearance above for the auxiliary block and wiring.
How are the power and control cables connected to the screw terminals, and what mistake should be avoided?
Strip each conductor to the terminal’s recommended length, insert fully, and tighten the screw to the specified torque; the common error is leaving strands loose or under-torqued, which causes heating.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
