Siemens
Siemens 3TH2040-0AK6 Contactor Relay - 110/120V AC, 4 NO
Siemens 3TH2040-0AK6 Contactor Relay - 110/120V AC
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CAGE: 9NK75
4 NO Auxiliary Contacts
110/120V AC Coil Voltage
EN 50011 Standard
Screw Terminals
AC Operation
Product description
The Siemens 3TH2040-0AK6 is a 40E series contactor relay, built to EN 50011 standards. It features 4 normally open (NO) contacts and operates on AC voltage at 110V AC (50 Hz) or 120V AC (60 Hz). This relay uses screw terminals for reliable connections.
This contactor relay is ideal for use in industrial control circuits, automation systems, and electrical panels where multiple normally open contacts are needed for control signaling.
Stanlo Automation, a veteran-owned surplus parts distributor, offers a wide range of industrial automation components. We are committed to providing quality products and excellent customer service.
Technical specifications
| Contacts | 4 NO |
| Coil Voltage | 110V AC (50 Hz) / 120V AC (60 Hz) |
| Series | 40E |
| Standard | EN 50011 |
| Connection | Screw terminal |
| Operation | AC |
Common applications
Industrial Control
Automation Systems
Machine Control
Electrical Panels
Compatible systems
Designed for AC control circuits, compatible with systems requiring 110V AC or 120V AC coil voltages.
Also known as
Siemens 40E Control Relay
3TH2040-0AK6
Replaces / compatible with
This product is phased-out. The successor is SIRIUS 3RH21.
Technical note
Expert tip
The screw terminals provide a secure and robust connection for industrial wiring applications.What happens next?
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Frequently asked questions
What is the coil voltage range for the Siemens 3TH2040-0AK6 Contactor Relay?
The Siemens 3TH2040-0AK6 Contactor Relay operates with a coil voltage of 110V AC at 50 Hz or 120V AC at 60 Hz, making it suitable for various power grids.