Siemens
Siemens 3RH1122-1HB40 SIRIUS Contactor Relay - 2 NO / 2 NC, 24V DC
Siemens 3RH1122-1HB40 SIRIUS Contactor Relay - 2 NO / 2 NC
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24V DC coil
2 NO + 2 NC auxiliary contacts
Screw terminal connection
Size S00
SIRIUS 3RH1 series
Phased-out product
Product description
The Siemens 3RH1122-1HB40 is a contactor relay within the SIRIUS 3RH1 series, featuring 2 normally open (NO) and 2 normally closed (NC) contacts. It is equipped with a 24V DC coil and uses screw terminals for size S00 connections.
This relay is commonly used in industrial control systems for switching auxiliary circuits and control signals. It is designed for reliable DC operation and is a phased-out product, with the preferred successor being the 3RH2122-1HB40.
Stanlo Automation, a veteran-owned business, provides surplus industrial automation components. Source your Siemens 3RH1122-1HB40 and other parts from us for quality and value.
Technical specifications
| Type | Contactor Relay |
| Manufacturer | Siemens |
| Series | SIRIUS 3RH1 |
| Part Number | 3RH1122-1HB40 |
| Contacts | 2 NO + 2 NC |
| Coil Voltage | 24V DC |
| Terminal Type | Screw |
| Size | S00 |
Common applications
DC Control Circuits
Industrial Automation
Control Panels
Machine Control
PLC Outputs
Compatible systems
Compatible with 24V DC control systems and PLC outputs.
Also known as
Siemens 3RH1122-1HB40 Relay
SIRIUS 24V DC Contactor
24VDC Control Relay
Replaces / compatible with
This product is phased out. The preferred successor is the Siemens SIRIUS 3RH2122-1HB40.
Technical note
Expert tip
The 24V DC coil is commonly used with PLC outputs, making this relay ideal for integration into automated systems.What happens next?
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Frequently asked questions
What is the control voltage for the Siemens 3RH1122-1HB40?
The Siemens 3RH1122-1HB40 is a DC-operated contactor relay with a rated coil voltage of 24V DC.