Siemens
Siemens 3RH1122-1BG40 SIRIUS Contactor Relay - 2 NO / 2 NC, 125V DC
Siemens 3RH1122-1BG40 SIRIUS Contactor Relay - 2 NO / 2 NC
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125V DC coil
2 NO + 2 NC auxiliary contacts
Screw terminal connection
Size S00
SIRIUS 3RH1 series
Phased-out product
Product description
The Siemens 3RH1122-1BG40 is a contactor relay from the SIRIUS 3RH1 series, featuring 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts. It operates with a 125V DC coil and uses screw terminals for size S00 connections.
This relay is designed for DC control circuits in industrial automation, offering reliable switching performance. It is a phased-out product, and its preferred successor is the Siemens 3RH2122-1BG40.
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Technical specifications
| Type | Contactor Relay |
| Manufacturer | Siemens |
| Series | SIRIUS 3RH1 |
| Part Number | 3RH1122-1BG40 |
| Contacts | 2 NO + 2 NC |
| Coil Voltage | 125V DC |
| Terminal Type | Screw |
| Size | S00 |
Common applications
DC Control Circuits
Industrial Automation
Control Panels
Machine Control
High Voltage DC Applications
Compatible systems
Designed for 125V DC control circuits.
Also known as
Siemens 3RH1122-1BG40 Relay
SIRIUS 125V DC Contactor
Phased-out Siemens Relay
Replaces / compatible with
This product is phased out. The preferred successor is the Siemens SIRIUS 3RH2122-1BG40.
Technical note
Expert tip
The 125V DC coil is suitable for higher voltage DC control systems, ensuring reliable operation in demanding applications.What happens next?
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Frequently asked questions
What is the coil voltage for the Siemens 3RH1122-1BG40?
The Siemens 3RH1122-1BG40 is a DC-operated contactor relay with a rated coil voltage of 125V DC.