Siemens 3RH2140-1AP00 Auxiliary Contactor, 4NO Contacts, 230V AC Coil, Size S00

The Siemens 3RH2140-1AP00 is a high-performance auxiliary contactor engineered for demanding industrial control environments. Built in the compact S00 size, this device provides four normally open (NO) contacts, making it an essential component for managing auxiliary circuits and control signals within complex automation systems. Its robust construction ensures consistent performance and long-term reliability in various electrical control applications.

Advantages

This auxiliary contactor stands out due to its space-saving S00 design, which allows for efficient use of space within electrical cabinets and control panels. The unit is designed for high operational reliability, minimizing the risk of downtime in automated processes. Its standardized interface ensures seamless integration with other Siemens control components, simplifying installation and maintenance procedures for technicians and engineers.

Suitable for

• Industrial automation control circuits
• Switching auxiliary signals in electrical panels
• Control systems requiring multiple normally open contacts
• Integration into modular control architectures

When it may not be suitable

This device is not intended for switching high-power main circuits or heavy motor loads, as it is strictly designed for auxiliary control purposes. It may also be unsuitable for environments requiring specific protection ratings beyond standard industrial panel enclosures without additional housing.

Key specifications

• Size: S00
• Contact configuration: 4 normally open (NO) contacts
• Control supply voltage: 230V AC
• Application: Auxiliary control circuits

How to use

The contactor is designed for mounting onto standard DIN rails or direct installation within a control panel. Ensure the control supply voltage matches the 230V AC requirement before connecting the coil terminals. Wiring should be performed according to the terminal markings to ensure the four normally open contacts function correctly within your control logic. Always verify that the electrical load on the auxiliary contacts remains within the specified operational limits.

What to consider before purchase

• Verify that your control circuit voltage is 230V AC
• Ensure the S00 size is compatible with your existing panel layout
• Confirm that four normally open contacts are sufficient for your specific control logic

Usage recommendations

For optimal longevity and safety, ensure the contactor is installed in a clean, dry environment protected from excessive dust and moisture. Regularly inspect terminal connections for tightness to prevent overheating during continuous operation.