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Siemens 3RH1903-0AA00 Auxiliary Switch Block - 3 NO

Siemens 3RH1903-0AA00 Auxiliary Switch Block, 3 NO

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ManufacturerSiemens

Part number3RH1903-0AA00

Contacts 3 NO

Terminal Type Screw

Size S00

Series SIRIUS 3RH11/3RH12

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3 Normally Open Contacts Screw Terminal Connections Size S00 For SIRIUS 3RH11/3RH12 Contactors

Product description

The Siemens 3RH1903-0AA00 is an auxiliary switch block designed for integration with SIRIUS 3RH11 and 3RH12 auxiliary and motor contactors. This unit provides 3 normally open (NO) contacts and uses screw terminals for secure electrical connections. It is designed for Size S00 and is part of a product line that has been superseded by the SIRIUS 3RH2 series.

This auxiliary switch block is used to expand the contact capabilities of a main contactor, enabling more complex control schemes, status monitoring, or interlocking functions in industrial automation applications. It is commonly found in control panels for machinery, building automation, and process control systems.

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Technical specifications

Contacts	3 NO
Terminal Type	Screw
Size	S00
Series	SIRIUS 3RH11/3RH12
Application	Auxiliary and motor contactors
Status	Phased-out

Common applications

Motor Control

Automation Systems

Control Panels

Status Feedback

Interlocking

Compatible systems

SIRIUS 3RH11 auxiliary contactors SIRIUS 3RH11 motor contactors SIRIUS 3RH12 auxiliary contactors SIRIUS 3RH12 motor contactors

Also known as

Siemens 3RH1903-0AA00 switch 3RH19030AA00 Siemens 3 NO auxiliary contact

Replaces / compatible with

The Siemens 3RH1903-0AA00 is an auxiliary switch block for older SIRIUS 3RH contactors. Newer equivalents can be found in the SIRIUS 3RH2 series.

Technical note

Expert tip

This 3RH1903-0AA00 auxiliary switch block is designed for the SIRIUS 3RH11/3RH12 series and provides 3 NO contacts, acting as an accessory to expand control possibilities; it's a phased-out part.

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Frequently asked questions

How many normally open contacts does the Siemens 3RH1903-0AA00 have?

The Siemens 3RH1903-0AA00 auxiliary switch block is equipped with three normally open (NO) contacts. This configuration is suitable for adding additional switching functions to a main contactor.