Siemens Auxiliary Switch: 1NO/1NC, Side Mount
The SIEMENS Auxiliary Switch (MPN 3RH1921-1KA11) is a side-mounted auxiliary contact block with a 1NO/1NC contact configuration, designed for Frame Size S0. It is compatible with the SIRIUS 3RT1 contactor series…
SKU 3G-OTH-38217
Also listed as: 3RH19211KA11 · 3RH1921 1KA11
Local availability & support — Singapore
- Local office
- 20 Woodlands Link #09-05, Singapore 738733
- Phone
- +65 8878 8355
- Delivery
- Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
- Payment
- Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
- Ships to
- Singapore
Need installation or engineering help?
Ask a question
Product Description
The SIEMENS Auxiliary Switch (MPN 3RH1921-1KA11) is a side-mounted auxiliary contact block with a 1NO/1NC contact configuration, designed for Frame Size S0. It is compatible with the SIRIUS 3RT1 contactor series, providing additional switching functionality for industrial control applications.
Frequently Asked Questions
What is the SIEMENS Auxiliary Switch 3RH1921-1KA11 used for?
The SIEMENS Auxiliary Switch 3RH1921-1KA11 is used to add extra switching contacts to SIRIUS 3RT1 contactors in industrial control panels. It provides a 1NO/1NC configuration for signaling, interlocking, or control logic in motor starters and automation systems.
What are the specifications of the SIEMENS 3RH1921-1KA11 auxiliary switch?
The SIEMENS 3RH1921-1KA11 is a side-mounted auxiliary contact block with 1 normally open and 1 normally closed contact. It is designed for Frame Size S0 and is compatible with the SIRIUS 3RT1 contactor series. The manufacturer part number is 3RH1921-1KA11.
Where to buy the SIEMENS 3RH1921-1KA11 auxiliary switch worldwide?
You can source the SIEMENS 3RH1921-1KA11 auxiliary switch worldwide through 3G Electric. As a global industrial equipment distributor, 3G Electric handles full logistics, customs clearance, and delivery to your location, ensuring a smooth procurement process for this Siemens component.
How to install the SIEMENS 3RH1921-1KA11 auxiliary switch?
To install the SIEMENS 3RH1921-1KA11, mount it on the side of a compatible SIRIUS 3RT1 contactor (Frame Size S0). Ensure the contactor is de-energized, snap the auxiliary block into the designated slot, and wire the 1NO and 1NC terminals according to your control circuit diagram.
Used in
Common applications for SiemensSiemens Products
3G Electric supplies Siemens siemens auxiliary contacts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
