The Siemens 3RT2017-1BB428K is a compact SIRIUS power contactor designed for reliable switching and control of three-phase motors in industrial, commercial, and automation applications. It is rated for AC-3e/AC-3 applications at 12 A and is suitable for motor loads up to 5.5 kW at 400 V. The contactor features a 24 V DC control coil, 3 main poles, 1 NC auxiliary contact, screw terminal connections, and a compact S00 size. These specifications correspond to the Siemens 3RT2017-1BB42 variant.
The Siemens SIRIUS 3RT2017-1BB428K is suitable for DOL motor starters, motor control panels, pumps, compressors, conveyors, HVAC equipment, machine tools, industrial automation, and factory electrical systems. Its compact S00 construction helps save panel space while providing dependable switching for three-phase motor control applications.
The 24 V DC control coil makes this contactor suitable for DC control circuits commonly used in industrial automation, PLC control panels, motor starters, and machine control systems. When combined with a suitably rated Siemens thermal overload relay or motor protection device, it can be used as part of a complete motor starter and protection solution.
Brand: Siemens
Product Family: SIRIUS 3RT
Model: 3RT2017-1BB428K
Base Variant: 3RT2017-1BB42
Product Type: Power Contactor
Utilization Category: AC-3e/AC-3
Rated Operational Current: 12 A
Motor Rating: 5.5 kW at 400 V
Main Poles: 3-Pole
Control Coil: 24 V DC
Auxiliary Contact: 1 NC
Terminal Connection: Screw Terminal
Contactor Size: S00
Application: Three-phase motor switching and control
The Siemens 3RT2017-1BB428K is suitable for:
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
PLC control panels
Factory electrical panels
OEM control panels
Motor switching applications
Reliable 12 A AC-3e/AC-3 motor switching
Suitable for motors up to 5.5 kW at 400 V
24 V DC control coil for industrial control circuits
1 NC auxiliary contact for control, interlocking, and signalling
Secure screw-terminal connections
Compact S00 construction
Suitable for industrial automation and motor control panels
Easy integration with compatible Siemens motor protection devices
Space-efficient solution for motor starter applications
Reliable Siemens SIRIUS technology
The Siemens SIRIUS 3RT2017-1BB428K provides dependable switching for industrial motor-control applications. Its 12 A AC-3 rating, 5.5 kW motor capacity at 400 V, 24 V DC coil, 3-pole configuration, 1 NC auxiliary contact, screw terminals, and S00 compact design make it suitable for a wide range of motor starters, electrical control panels, machine automation, and industrial switching applications. Siemens' current Industry Mall identifies the corresponding 3RT2017-1BB42 as an active SIRIUS power contactor.
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 3RT2017-1BB428K?
It is a Siemens SIRIUS power contactor designed for switching and controlling three-phase motors and industrial electrical loads.
Q2. What is the rated current?
The contactor is rated at 12 A for AC-3e/AC-3 applications.
Q3. What motor power can it handle?
It is suitable for motor applications up to 5.5 kW at 400 V.
Q4. What is the control coil voltage?
It uses a 24 V DC control coil.
Q5. How many main poles does it have?
It has 3 main poles for three-phase motor switching.
Q6. Does it have auxiliary contacts?
Yes. The corresponding Siemens variant has 1 NC auxiliary contact. It is not 2 NO + 2 NC.
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 Siemens SIRIUS 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 a suitably 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 | 3RT2017-1BB428K |
| Product Type | Power Contactor |
| Contactor Configuration | 3 Pole |
| Rated Current (AC-3) | 12 A |
| Motor Rating | 5.5 kW @ 400 V AC |
| Coil Type | 24 V DC |
| Auxiliary Contacts | 2 NO + 2 NC |
| Contact Feedback | Mirror Contact Elements |
| Terminal Type | Screw Terminals |
| Frame Size | S00 |
| Application | Motor Control & Power Switching |
| Brand | Siemens |
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