Siemens
Siemens 3RH1911-1HA01 Auxiliary Switch Block (1 NO, 1 NC)
Siemens 3RH1911-1HA01 Auxiliary Switch Block, 1 NO + 1 NC, Screw Terminal.
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12-month warranty
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Same-day dispatch
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Worldwide delivery
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Veteran-owned
CAGE: 9NK75
1 Normally Open Contact
1 Normally Closed Contact
Screw Terminal Connections
Attachable to Motor Contactors
Supports 4-Pole Contactors
EN 50012 Compliance
Product description
The Siemens 3RH1911-1HA01 is an auxiliary switch block providing 1 normally open (NO) and 1 normally closed (NC) contact. It utilizes screw terminals for connection and is designed for 4-pole motor contactors.
This accessory is essential for adding basic signaling and interlocking functions to motor starters and contactors, enabling status monitoring and control logic integration in industrial automation systems.
As a veteran-owned surplus parts distributor, Stanlo Automation offers the Siemens 3RH1911-1HA01. We specialize in providing reliable, obsolete, and hard-to-find automation components to support your maintenance and project needs.
Technical specifications
| Type | Auxiliary Switch Block |
| Manufacturer | Siemens |
| Part Number | 3RH1911-1HA01 |
| Contact Configuration | 1 NO + 1 NC |
| Terminal Type | Screw Terminal |
| Application | For Motor Contactors |
| Pole Count | 4-pole |
| Standard | EN 50012 |
Common applications
Motor Control Feedback
Control Panel Wiring
Automation Systems
Safety Interlocks
Industrial Control
Contactor Accessories
Compatible systems
Designed to be mounted on Siemens 4-pole motor contactors, adding essential auxiliary contact functions.
Also known as
Siemens 3RH1911-1HA01 Auxiliary Contacts
SIRIUS 3RH1911-1HA01
Siemens Motor Contactor Auxiliary
Replaces / compatible with
This is a phased-out product. The preferred successor is the SIRIUS 3RH2911-1HA01. Consult the successor for current product information.
Technical note
Expert tip
Ensure the correct mounting orientation when attaching this block to the motor contactor for proper functionality.What happens next?
1
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2
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Confirms your part's spec and condition
3
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Frequently asked questions
What is the primary use of the Siemens 3RH1911-1HA01?
The Siemens 3RH1911-1HA01 is an auxiliary switch block primarily used to add one normally open (NO) and one normally closed (NC) contact to 4-pole Siemens motor contactors for control and signaling purposes.