The Siemens 3RT2038-1NB308K is a premium Power Contactor from the trusted SIRIUS 3RT2 series, designed for reliable switching and control of three-phase motors and industrial electrical loads. Featuring an 80A AC-3e/AC-3 rating and suitable for motors up to 37 kW at 400V, this contactor provides dependable performance for demanding industrial motor-control applications. Its 20–33V AC/DC control voltage, 50/60 Hz frequency, and integrated varistor provide reliable operation and effective coil surge suppression. The contactor includes 1 NO + 1 NC auxiliary contacts, making it suitable for control, feedback, signaling, and electrical interlocking functions.
The Siemens 3RT2038-1NB308K is suitable for three-phase motor control, Motor Control Centers (MCC), DOL starters, pump control systems, compressors, conveyor systems, HVAC equipment, industrial machinery, OEM control panels, and factory automation. Its robust construction and SIRIUS design make it suitable for reliable operation in demanding industrial environments.
At SB Smart, Faridabad, we supply 100% genuine Siemens SIRIUS contactors, motor protection circuit breakers, overload relays, soft starters, MCCBs, MCBs, and industrial automation products at competitive prices. We provide GST invoices, expert technical support, bulk order assistance, secure packaging, and fast delivery across Faridabad, Delhi NCR, and all major cities in India, making SB Smart a trusted supplier for industries, OEMs, panel builders, and electrical contractors.
Genuine Siemens SIRIUS 3RT2 Power Contactor
Model: 3RT2038-1NB308K
Utilization Category: AC-3e/AC-3
Rated Operational Current: 80A
Motor Power: 37 kW at 400V
Rated Operating Voltage: 400V
3-Pole Configuration
Control Voltage: 20–33V AC/DC
Control Frequency: 50/60 Hz
Integrated Varistor
Auxiliary Contacts: 1 NO + 1 NC
Screw Terminal Connections
Contactor Size: S2
Suitable for three-phase motor switching
Suitable for industrial automation and motor-control applications
Motor Control Centers (MCC)
Industrial Automation Panels
DOL Motor Starters
Three-Phase Motor Control
Pump Control Panels
Compressors
Conveyor Systems
HVAC Systems
Manufacturing Machinery
OEM Electrical Panels
Machine Control Panels
Factory Automation
Reliable 80A AC-3e/AC-3 motor switching
Suitable for motors up to 37 kW at 400V
Flexible 20–33V AC/DC control voltage
Integrated varistor helps suppress coil switching transients
1 NO + 1 NC auxiliary contacts for control and signaling
Robust 3-pole construction
Secure screw terminal connections
Compact and durable SIRIUS design
Suitable for demanding industrial applications
Reliable performance with Siemens SIRIUS technology
The Siemens 3RT2038-1NB308K is a SIRIUS power contactor designed for switching and controlling three-phase motors and industrial electrical loads. It is rated at 80A AC-3e/AC-3 and supports motors up to 37 kW at 400V.
The contactor has a rated operational current of 80A in AC-3e/AC-3 applications.
The 3RT2038-1NB308K is suitable for motors up to 37 kW at 400V.
The contactor operates with a 20–33V AC/DC control voltage at 50/60 Hz for AC operation.
Yes. The 3RT2038-1NB308K features an integrated varistor for coil surge suppression.
It includes 1 NO + 1 NC auxiliary contacts, which can be used for control, feedback, signaling, and electrical interlocking.
The contactor uses screw terminal connections for electrical wiring.
The 3RT2038-1NB308K belongs to Size S2.
Yes. It can be used in DOL motor starter assemblies along with an appropriate Siemens motor protection device.
It can be used in MCC panels, industrial automation systems, pumps, compressors, conveyors, HVAC equipment, manufacturing machinery, OEM panels, and factory automation applications.
SB Smart, Faridabad supplies 100% genuine Siemens industrial products with competitive pricing, expert technical support, GST invoices, bulk order assistance, secure packaging, and fast delivery across Faridabad, Delhi NCR, and throughout India.
| Specification | Details |
|---|---|
| Product Name | Power Contactor |
| Brand | Siemens |
| Series | SIRIUS 3RT2 |
| Model Number | 3RT2038-1NB308K |
| SKU | 3RT2038-1NB308K |
| Product Type | Power Contactor |
| Utilization Category | AC-3 |
| Rated Operational Current (AC-3) | 80 A |
| Motor Rating at 400V | 37 kW |
| Number of Poles | 3 Pole |
| Main Contacts | 3 NO |
| Auxiliary Contacts | 1 NO + 1 NC |
| Coil Voltage | 20–33 V AC/DC |
| Coil Variant | NB308K |
| Coil Type | Electronic Coil |
| Frame Size | S2 |
| Terminal Type | Screw Terminals |
| Integrated Surge Suppression | Yes |
| Rated Insulation Voltage (Ui) | Up to 1000 V |
| Protection Class | IP20 |
| Mechanical Life | Up to 10 Million Operations |
| Mounting Type | Panel Mount |
| Operating Temperature | -25°C to +60°C |
| Application | Motor Control & Industrial Switching |
| Product Family | Siemens SIRIUS Contactors |
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