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Siemens 3RH2921-2DE11 SIRIUS Solid-State Compatible Auxiliary Switch

Siemens 3RH2921-2DE11 lateral auxiliary switch with spring terminals.

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ManufacturerSiemens

Part number3RH2921-2DE11

Contact Configuration 1 NO + 1 NC

Terminal Type Spring-loaded

Mounting Lateral

Compatibility Siemens 3RT2, 3RH2

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Veteran-owned

CAGE: 9NK75

1 NO + 1 NC contact configuration Spring-loaded terminals for fast wiring Lateral mounting Solid-state compatible for modern control Designed for SIRIUS 3RT2 and 3RH2 series

Product description

The Siemens 3RH2921-2DE11 is a lateral auxiliary switch block designed for seamless integration with 3RT2 power contactors and 3RH2 contactor relays. This unit features a 1 NO + 1 NC contact configuration and utilizes spring-loaded terminals for reliable, vibration-proof connections. It is specifically designed to be solid-state compatible, ensuring optimal performance with modern control systems.

This auxiliary switch is ideal for applications in industrial automation, machine control, and electrical panel building where reliable signaling and control are essential. Its solid-state compatibility makes it suitable for use with PLCs and other sensitive electronic control circuits, enhancing system durability.

Stanlo Automation, a veteran-owned distributor of surplus industrial parts, offers the Siemens 3RH2921-2DE11. Trust us for quality components that keep your operations running smoothly.

Technical specifications

Contact Configuration	1 NO + 1 NC
Terminal Type	Spring-loaded
Mounting	Lateral
Compatibility	Siemens 3RT2, 3RH2
Solid-State Compatible	Yes
Series	SIRIUS 3RH29

Common applications

Industrial Control Panels

Automation Systems

PLC Interfacing

Motor Control

Machine Safety

Compatible systems

Siemens 3RT2.2 Siemens 3RT2.3 Siemens 3RT2.4 Siemens 3RH2

Also known as

Siemens 3RH29212DE11 SIRIUS 3RH2921-2DE11 Siemens Solid State Auxiliary Switch

Replaces / compatible with

This auxiliary switch is designed to be compatible with Siemens 3RT2 contactors and 3RH2 contactor relays.

Technical note

Expert tip

The 3RH2921-2DE11 auxiliary switch is designed for lateral mounting and features solid-state compatibility, making it suitable for direct connection to PLC inputs.

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Frequently asked questions

What is the advantage of spring-loaded terminals on the 3RH2921-2DE11?

Spring-loaded terminals on the Siemens 3RH2921-2DE11 provide a fast, vibration-proof, and maintenance-free connection, significantly reducing installation time and increasing system reliability compared to traditional screw terminals.