Siemens
Siemens 3TH3040-0A Contactor Relay - 40E, 4 NO, AC Operation
Siemens 3TH3040-0A Contactor Relay with 4 NO contacts.
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12-month warranty
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Same-day dispatch
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Veteran-owned
CAGE: 9NK75
4 Normally Open (NO) Contacts
AC Operation
IS/IEC 60947-5-1 Standard
Screw Terminals
Reliable Switching
Product description
The Siemens 3TH3040-0A is a contactor relay designed for AC control circuits, featuring 4 normally open (NO) contacts. It operates with AC coil voltages including 230V AC and conforms to IS/IEC 60947-5-1 standards.
This relay is widely used in industrial automation for switching and signaling purposes, as well as for interfacing with electronic circuits. Its robust design ensures reliability and a long operational life.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3TH3040-0A. We provide quality automation components and efficient service to keep your industrial operations running smoothly.
Technical specifications
| Manufacturer | Siemens |
| Part Number | 3TH3040-0A |
| Type | Contactor Relay |
| Contacts | 4 NO |
| Coil Voltage | 230V AC (also other AC voltages available) |
| Standard | IS/IEC 60947-5-1 |
| Operation | AC |
Common applications
Control Circuits
Signaling
Industrial Automation
Electronic Circuit Interfacing
Auxiliary Circuits
Compatible systems
Compatible with standard AC control systems and suitable for direct integration into PLC or instrumentation circuits.
Also known as
Siemens 3TH3040-0A Contactor
Siemens 230V AC Relay
40E Contactor Relay
Replaces / compatible with
The 3TH30 series offers flexibility in contact configurations, with the ability to extend up to 8 contacts by adding auxiliary contact blocks.
Technical note
Expert tip
This AC operated contactor relay boasts a double-break parallel bridge contact mechanism, ensuring reliable contact at low voltages and currents, making it suitable for PLC integration.What happens next?
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Frequently asked questions
What are the typical applications for the Siemens 3TH3040-0A contactor relay?
The Siemens 3TH3040-0A is commonly used in industrial control circuits for switching and signaling purposes, and for interfacing with electronic control systems.