Overview
The Siemens 3TB40 10-0B contactor is a robust 3-phase IEC-compliant contactor engineered for industrial motor control applications. With a 20A thermal current rating and 24VDC operating coil, this unit delivers dependable switching performance in motor starter assemblies and control panels. Compliant with IEC 60947-4-1 and IEC 60946 standards, it integrates seamlessly into existing automation systems requiring verified, drop-in motor control solutions.
Key Features
- 3-phase IEC-rated design for motor control and load switching
- 20A thermal current (Ith) rating with 9A effective current at 380V
- 24VDC coil voltage for flexible control circuit integration
- Compact form factor suitable for panel and enclosure mounting
- Proven Siemens reliability and long operational life
- Full IEC 60947-4-1 and IEC 60946 compliance
Technical Specifications
- Power Rating: 3 HP @ 230V AC, 5 HP @ 460V AC
- Thermal Current (Ith): 20A
- Effective Current: 9A @ 380V
- Coil Voltage: 24VDC
- Pole Configuration: 3-phase (3P)
- Standards: IEC 60947-4-1, IEC 60946
- Voltage Rating (Ui): 660V
- Operating Frequency: 50/60 Hz
- Weight: 1.0 lb
Typical Applications
The 3TB40 10-0B excels in diverse industrial motor control scenarios including:
- Three-phase induction motor starting and stopping
- Industrial automation control panels
- Motor starter assemblies and soft-start circuits
- Process machinery requiring reliable load switching
- HVAC and pump motor control systems
- Machine tool and conveyor system starters
Compatibility & Replacements
The Siemens 3TB40 10-0B is directly interchangeable with equivalent part numbers 3TB4010-0B and 3TB40100B. As a World Series IEC contactor, it maintains compatibility with standard IEC mounting patterns and control circuit interfaces. When replacing worn or failed contactors in legacy systems, this unit provides verified drop-in functionality with no panel modifications required. Always verify coil voltage and pole configuration before installation to ensure seamless integration with existing motor control circuits.
