The Siemens 3RT2018-1AP028K is a SIRIUS power contactor designed for reliable switching and control of three-phase motors and industrial electrical loads. The corresponding Siemens 3RT2018-1AP02 variant is rated 16 A for AC-3e/AC-3 applications and is suitable for motor loads up to 7.5 kW at 400 V. It features a 230 V AC control coil at 50/60 Hz, 3 main poles, 1 NC auxiliary contact, screw terminal connections, and a compact S00 size.
This Siemens power contactor is suitable for three-phase motor control, DOL motor starters, industrial control panels, pumps, compressors, conveyors, HVAC equipment, machine tools, and industrial automation systems. Its compact S00 design helps optimize panel space while providing dependable switching performance in motor-control applications.
The 230 V AC control coil allows the contactor to be integrated into conventional AC control circuits and industrial electrical panels. It can be paired with a compatible Siemens thermal overload relay or motor protection device to create a complete motor starter and protection solution.
Brand: Siemens
Product Family: SIRIUS 3RT
Model: 3RT2018-1AP028K
Utilization Category: AC-3e/AC-3
Rated Operational Current: 16 A
Motor Rating: 7.5 kW at 400 V
Main Poles: 3-Pole
Control Voltage: 230 V AC
Frequency: 50/60 Hz
Auxiliary Contact: 1 NC
Terminal Connection: Screw Terminal
Contactor Size: S00
Product Type: Power Contactor
Application: Three-phase motor switching and control
The Siemens 3RT2018-1AP028K can be used in:
Three-phase motor control
DOL motor starter applications
Industrial motor control panels
Pump control systems
Compressor systems
Conveyor systems
HVAC equipment
Machine tools
Industrial automation
Factory electrical panels
OEM control panels
Motor switching applications
Reliable 16 A AC-3e/AC-3 motor switching
Suitable for motors up to 7.5 kW at 400 V
230 V AC, 50/60 Hz control coil
1 NC auxiliary contact for control and interlocking
Secure screw-terminal connections
Compact S00 construction
Suitable for industrial automation and control panels
Easy integration with compatible Siemens motor protection devices
Reliable Siemens SIRIUS technology
The Siemens SIRIUS 3RT2018-1AP02 series provides dependable switching for industrial motor-control applications. Its 16 A AC-3 rating, 7.5 kW motor capacity at 400 V, 230 V AC control coil, 3-pole configuration, 1 NC auxiliary contact, screw terminals, and S00 compact design make it suitable for a wide range of motor starter and industrial automation requirements. Siemens currently lists the corresponding 3RT2018-1AP02 as an active SIRIUS product.
At SB Smart, Faridabad, we supply genuine Siemens SIRIUS power contactors, thermal overload relays, motor protection relays, motor protection circuit breakers, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices. We provide GST invoices, technical assistance, bulk-order support, secure packaging, and delivery across Faridabad, Delhi NCR, and major cities throughout India.
Whether you are sourcing a Siemens contactor for a motor starter, electrical control panel, industrial automation project, replacement requirement, or bulk procurement, SB Smart provides product assistance and nationwide supply support.
Q1. What is Siemens 3RT2018-1AP028K?
It is a Siemens SIRIUS power contactor used for switching and controlling three-phase motors and industrial electrical loads.
Q2. What is the rated current?
The corresponding 3RT2018-1AP02 variant is rated at 16 A for AC-3e/AC-3 applications.
Q3. What motor power can it handle?
It is suitable for motor applications up to 7.5 kW at 400 V.
Q4. What is the control voltage?
The corresponding variant uses a 230 V AC control voltage at 50/60 Hz.
Q5. How many main poles does it have?
It has 3 main poles for three-phase motor switching.
Q6. Does it have an auxiliary contact?
Yes. The corresponding 3RT2018-1AP02 variant has 1 NC auxiliary contact.
Q7. What type of terminals does it use?
It uses screw terminal connections.
Q8. What is the contactor size?
It is a compact S00-size contactor.
Q9. Can it be used in a DOL starter?
Yes. It can be used as the main contactor in a DOL motor starter when paired with an appropriately rated motor-protection device.
Q10. Where can I buy Siemens contactors in India?
SB Smart, Faridabad supplies Siemens SIRIUS contactors and industrial electrical and automation products with GST billing, technical assistance, bulk-order support, secure packaging, and delivery across India.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2018-1AP028K |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 16 A |
| Motor Rating | 7.5 kW @ 400 V AC |
| Coil Type | 230 V AC 50/60 Hz (AC/DC coil family) |
| Auxiliary Contact | 1 NO |
| Contact Feedback | Mirror Contact Elements |
| Terminal Type | Screw Terminals |
| Frame Size | S00 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
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