The Siemens 3RT2018-1BF428K is a SIRIUS power contactor designed for reliable switching and control of three-phase motors and industrial electrical loads. It is rated 16 A for AC-3e/AC-3 applications and is suitable for motor loads up to 7.5 kW at 400 V. The contactor features a 110 V DC control coil, 3 main poles, 1 NC auxiliary contact, screw terminal connections, and a compact S00 size. Siemens lists the corresponding 3RT2018-1BF42 model with these specifications.
The contactor is suitable for motor starters, DOL motor control, industrial control panels, pumps, compressors, conveyors, HVAC equipment, machine tools, and industrial automation systems. Its compact S00 design helps provide efficient installation in motor control panels where reliable switching and space-efficient components are required.
For motor protection, the contactor can be combined with a compatible Siemens thermal overload relay, motor protection circuit breaker, or other suitable motor protection device, depending on the application and motor characteristics.
Brand: Siemens
Product Family: SIRIUS 3RT
Model: 3RT2018-1BF428K
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: 110 V DC
Auxiliary Contacts: 1 NC
Terminal Type: Screw Terminal
Contactor Size: S00
Product Type: Power Contactor
Main Application: Three-phase motor switching and control
The Siemens 3RT2018-1BF428K can be used in:
Three-phase motor control
DOL motor starters
Motor control panels
Pump control systems
Compressor applications
Conveyor systems
HVAC equipment
Machine tools
Industrial automation
Factory electrical systems
PLC-controlled motor applications
OEM control panels
Reliable 16 A AC-3e/AC-3 switching performance
Suitable for motor loads up to 7.5 kW at 400 V
110 V DC control coil for DC control circuits
1 NC auxiliary contact for control, interlocking, and signalling
Secure and practical screw terminal connections
Compact S00 construction
Suitable for industrial motor-control applications
Easy integration into control and automation panels
Compatible with suitable Siemens motor-protection components
Siemens SIRIUS technology for dependable industrial switching
The Siemens SIRIUS 3RT2018-1BF42 power contactor provides dependable motor switching for industrial electrical systems. Its 16 A AC-3 rating, 7.5 kW motor capacity at 400 V, 110 V DC coil, 3-pole configuration, 1 NC auxiliary contact, and S00 compact design make it suitable for a wide range of motor-control applications.
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 looking for 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 3RT2018-1BF428K?
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 contactor has an AC-3e/AC-3 rated current of 16 A.
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 contactor uses a 110 V DC control voltage.
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 3RT2018-1BF42 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. Where can this Siemens contactor be used?
It can be used in motor starters, pumps, compressors, conveyors, HVAC systems, machine tools, industrial automation, and electrical control panels.
Q10. Where can I buy Siemens contactors in India?
SB Smart, Faridabad supplies Siemens SIRIUS contactors and industrial automation products with GST billing, technical assistance, bulk-order support, and delivery across India.
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RT2 |
| Model Number | 3RT2018-1BF428K |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 16 A |
| Motor Rating | 7.5 kW @ 400 V AC |
| Coil Type | 24 V AC/DC |
| Auxiliary Contact | 1 NO |
| Contact Feedback | Mirror Contact Elements |
| Terminal Type | Screw Terminals |
| Frame Size | S00 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
No reviews yet.