We will arrange delivery within 3-5 days after receiving the payment.
Our express delivery: DHL and FedEx.
Quality packing for each product
Destination country all taxes & duty to be paid by buyer
Only part of the brand and model, if you have other product needs, please contact us.

SIEMENS 3RH1911-1GA04 Auxiliary Contact Block
Product Overview
SIEMENS 3RH1911-1GA04 is a SIRIUS Auxiliary Contact Block (Auxiliary Switch Block) used to expand the auxiliary contacts of Siemens contactors and contactor relays. It is mounted on the front of compatible contactors to provide additional switching contacts for control, feedback, signaling, and interlocking circuits.
This model provides 4 normally closed contacts (4NC) and is designed for S00 size Siemens contactors and contactor relays with screw terminal connection.
Specifications
- Brand: SIEMENS
- Series: SIRIUS 3RH19
- Model: 3RH1911-1GA04
- Product Type: Auxiliary Contact Block / Auxiliary Switch
- Contact Configuration: 4NC (4 Normally Closed)
- Identification Number: 44E
- Mounting Type: Front snap-on mounting
- Size: S00
- Connection Type: Screw Terminal
- Compatible Devices:
- SIEMENS 3RH10 / 3RH11 contactor relays
- SIEMENS 3RT10 power contactors
- Rated Insulation Voltage: 690 V
- Rated Impulse Withstand Voltage: 6 kV
- Rated Operating Current: Up to 6 A (AC-15 at 230 V)
- Protection Rating: IP20
- Mechanical Life: Approx. 10 million switching cycles
- Electrical Life: Approx. 200,000 switching cycles (AC-15, 230 V)
Advantages & Features
- Adds extra auxiliary contacts without replacing the main contactor
- Provides four independent NC signal contacts
- Compact S00 design saves control cabinet space
- Quick front mounting installation
- Reliable Siemens SIRIUS contact technology
- Suitable for electrical interlocking and status feedback
- Improves flexibility of industrial control circuits
- Long mechanical service life
Applications
- Industrial automation control panels
- Motor starter circuits
- PLC feedback systems
- Contactor status monitoring
- Electrical interlocking circuits
- Machine control equipment
- Factory automation systems
- Low-voltage control cabinets
Precautions
- Confirm compatibility with the installed Siemens contactor model
- Verify contact arrangement (4NC) before wiring
- Do not exceed auxiliary contact current ratings
- Ensure the contact block is securely mounted
- Disconnect power before installation or maintenance
- Test auxiliary contact operation after installation