Siemens SIRIUS 3RT2038-3KB40 Power Contactor, 24 V DC, 80 A AC-3
24 V DC | 80 A AC-3 | 1NO + 1NC
Siemens SIRIUS power contactor 3RT2038-3KB40
The Siemens SIRIUS 3RT2038-3KB40 is a 3-pole power contactor designed for switching motors and auxiliary circuits in industrial electrical installations.
The contactor is rated for 80 A in AC-3 duty and 90 A in AC-1 duty. It features a 24 V DC coil with integrated varistor, one normally open and one normally closed auxiliary contact, and size S2 construction.
Key features:
- 3-pole power contactor
- 24 V DC coil with integrated varistor
- AC-3 rated current: 80 A
- AC-1 rated current: 90 A
- Motor rating: 37 kW at 400 V
- Integrated auxiliary contacts: 1NO + 1NC
- Construction size: S2
Siemens order number: 3RT2038-3KB40.
Application
The 3RT2038-3KB40 contactor is suitable for switching electric motors and other electrical loads in industrial control and power circuits. It belongs to the Siemens SIRIUS 3RT2 contactor range and is designed for integration into modular SIRIUS switching systems.
The AC-3 utilization category is intended primarily for switching squirrel-cage motors, while the AC-1 rating applies to non-inductive or slightly inductive loads.
Connection and auxiliary contacts
The main power circuit uses screw terminals, while the control and auxiliary circuits are equipped with spring-loaded terminals. This combination provides a secure connection while simplifying wiring of the control circuit.
- Main circuit: screw terminals
- Control and auxiliary circuit: spring-loaded terminals
- Auxiliary contacts: 1NO + 1NC
- Coil voltage: 24 V DC
- Coil protection: integrated varistor
Technical data
| Manufacturer | Siemens |
| Product series | SIRIUS 3RT2 |
| Product type | Power contactor |
| Order number | 3RT2038-3KB40 |
| Number of poles | 3 |
| Control voltage | 24 V DC |
| Rated current AC-1 | 90 A |
| Rated current AC-3 | 80 A |
| Motor rating AC-3 at 400 V | 37 kW |
| Auxiliary contacts | 1NO + 1NC |
| Construction size | S2 |
| Main circuit connection | Screw terminals |
| Control / auxiliary connection | Spring-loaded terminals |
| Surge suppression | Integrated varistor |
Technical data for Siemens SIRIUS contactor, order number 3RT2038-3KB40.
Additional parameters
| Category: | Spare parts |
|---|---|
| Warranty: | 2 years |