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Siemens 3RH2122-1BB40 Contactor Relay - 24V DC, 2 NO + 2 NC

Siemens 3RH2122-1BB40 Contactor Relay with 24V DC coil, 2 NO + 2 NC contacts.

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ManufacturerSiemens

Part number3RH2122-1BB40

Coil Voltage 24V DC

Contacts 2 NO + 2 NC

Terminal Type Screw

Frame Size S00

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CAGE: 9NK75

2 Normally Open (NO) and 2 Normally Closed (NC) contacts 24V DC coil voltage Screw terminals for secure wiring Compact frame size S00 Designed for DC control applications

Product description

The Siemens 3RH2122-1BB40 is a SIRIUS 3RH2 series contactor relay designed for DC control circuits, featuring a 24V DC coil and a contact configuration of 2 normally open (NO) and 2 normally closed (NC) contacts. It uses screw terminals for reliable connections and is built in compact frame size S00.

This DC-operated contactor relay is ideal for applications where DC control power is available, such as in battery-powered systems, specialized industrial machinery, or control systems requiring specific DC voltage levels. The 2 NO + 2 NC configuration provides versatile options for signaling, interlocks, and control logic in automation environments.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RH2122-1BB40. We are committed to providing quality industrial automation parts, including surplus inventory. When you source from Stanlo, you receive reliable components backed by our dedication to customer service.

Technical specifications

Coil Voltage	24V DC
Contacts	2 NO + 2 NC
Terminal Type	Screw
Frame Size	S00
Series	SIRIUS 3RH2

Common applications

DC control circuits

Industrial automation

Control panels

Battery-powered systems

Specialized machinery

Signaling and interlocks

Compatible systems

Siemens Control Systems DC Control Circuits Industrial Automation Panels

Also known as

Siemens 3RH2122-1BB40 DC relay Siemens 24V DC contactor relay 3RH2122-1BB40 SIRIUS DC relay

Replaces / compatible with

This DC contactor relay is a suitable replacement for other Siemens 3RH2 or 3RH1 series contactor relays requiring a 24V DC coil.

Technical note

Expert tip

For DC applications, ensure that appropriate surge suppression is considered for the coil circuit of the 3RH2122-1BB40 to protect against voltage spikes.

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Frequently asked questions

What is the coil voltage and contact arrangement for the Siemens 3RH2122-1BB40 contactor relay?

The Siemens 3RH2122-1BB40 contactor relay operates with a 24V DC coil. It features a versatile configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, suitable for a wide range of control tasks.