SIEMENS 3RH1122-1AB00 3RH1911-2GA04

Siemens Contactor Relay Assembly 3RH1122-1AB00 with 3RH1911-2GA04

Description

This is a complete contactor relay assembly from the Siemens SIRIUS 3RH1 series. It consists of a 3RH1122-1AB00 contactor relay base unit combined with a front-mounted 3RH1911-2GA04 auxiliary switch block. This assembly is engineered for switching control signals within industrial automation systems, offering a total of four normally open and four normally closed contacts. The unit is actuated by a 24V AC control coil, making it suitable for standard control voltages.

Specifications

• Manufacturer: Siemens
• Series: SIRIUS 3RH1
• Base Unit Type: 3RH1122-1AB00
• Auxiliary Block Type: 3RH1911-2GA04
• Control Voltage: 24V AC, 50/60 Hz
• Total Contacts: 4 NO + 4 NC
• Main Contacts (3RH1122-1AB00): 2 NO + 2 NC
• Auxiliary Contacts (3RH1911-2GA04): 2 NO + 2 NC
• Rated Operational Current (AC-12): 10 A
• Rated Insulation Voltage (Ui): 690V
• Terminal Type: Screw Terminals
• Mounting: DIN Rail or Screw Mount

Label Info

• Contactor EAN: 4011209296107
• Auxiliary Block EAN: 4011209299665

Application

Ideal for use in control cabinets for signal processing, as an interface relay, or for small motor control. Its robust design makes it suitable for a wide range of industrial environments.

Country of Origin

Made in Germany.

CO2 Impact

Choosing this reused component prevents the emission of approximately 10 kg of CO2 compared to manufacturing a new one. This saving is equivalent to the emissions of a 50 km car journey, making it an environmentally responsible choice for your operations.

Availability

This unit is in stock and available for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

Question?
The auxiliary block is labeled 3RH1911-2GA04, which corresponds to spring-type terminals, but it has screw terminals. Can you clarify?

Answer
This is a known inconsistency in some production runs. While the part number suggests spring-type (Cage Clamp) terminals, this specific unit is physically equipped with screw terminals. Functionally, it is identical to the screw-terminal version (3RH1911-2FA04) and is fully compatible with the 3RH11 contactor relay.

Question?
What is the total contact configuration of this combined assembly?

Answer
The main contactor relay (3RH1122-1AB00) has 2 Normally Open (NO) and 2 Normally Closed (NC) contacts. The top-mounted auxiliary block (3RH1911-2GA04) adds another 2 NO and 2 NC contacts. Therefore, the total configuration for this assembly is 4 NO + 4 NC.

Question?
Is this 3RH1 series contactor relay compatible with accessories from the newer 3RH2 SIRIUS series?

Answer
No, accessories are generally not cross-compatible between the older 3RH1 series and the newer 3RH2 series. This includes auxiliary blocks, surge suppressors, and mechanical interlocks. It is important to use accessories specified for the 3RH1 generation for guaranteed fit and function.

Friday, March 13, 2026

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