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AUXILIARY SWITCH
Available
Free Shipping
2 Year MRO warranty
| Part Number | 3RH1921-1EA20 |
| Manufacturer | Siemens |
| Type | Contactors |
| Model # | 3RH19211EA20 |
| MRO Warranty | 2 Year |
MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.
MRO can restore your failed 3RH1921-1EA20 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.
Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year MRO warranty.
Our technicians have vast experience with most manufacturers and models. In addition to this 3RH1921-1EA20 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.
If you are interested in getting credit for your faulty 3RH1921-1EA20, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.
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Ask about exchanging your faulty 3RH1921-1EA20 for credit when ordering from MRO Electric
The Siemens 3RH19211EA20 Auxiliary Switch is a precision-engineered control component designed for seamless integration with Siemens 3RT1 Series Contactors. Designed for dependable switching and feedback, this first lateral auxiliary switch enhances operational performance across a wide range of industrial automation and control applications.
This auxiliary switch is rated for 10 amps at 240 VAC, making it ideal for demanding electrical environments. With two normally open (2NO) contacts, it delivers consistent, accurate feedback signaling within motor control circuits, switchgear, and industrial panels. Whether you're monitoring contactor status or extending control functionality, the 3RH19211EA20 ensures smooth, reliable operation.
Engineered by Siemens for long-term durability, this model features screw terminals for secure, vibration-resistant connections. Its lateral mounting design allows it to attach directly to the side of compatible 3RT1 contactors, providing space efficiency and simplified installation. The rugged housing protects against dust, vibration, and industrial wear, ensuring reliable performance in even the harshest factory conditions.
As part of Siemens' renowned SIRIUS modular system, the 3RH19211EA20 integrates flawlessly with 3RT1 contactors and accessories. It can be combined with control relays, timing modules, and overload relays to create flexible automation solutions tailored to your operational needs.
Trusted by professionals worldwide, Siemens designs its auxiliary switches to maintain consistent electrical contact integrity. The 3RH19211EA20 is tested to meet strict IEC and UL standards, ensuring long-lasting reliability in both control cabinets and automated systems.
At MRO Electric, we provide free shipping, immediate availability, and a 2-year warranty on all Siemens automation parts. This ensures you receive genuine components backed by full support, helping minimize downtime and maximize productivity.
What does the Siemens 3RH19211EA20 do?
It provides auxiliary contact signaling for Siemens 3RT1 contactors, enabling control or monitoring functions.
How many contacts does it have?
It features two normally open (2NO) contacts.
Is it compatible with all Siemens contactors?
It's explicitly designed for Siemens 3RT1 Series contactors.
What is its current rating?
It can handle up to 10 amps.
What is the voltage rating?
The 3RH19211EA20 is rated for 240 VAC.
How is it mounted?
It uses first lateral mounting for side attachment to contactors.
Does it require special tools to install?
No, it installs easily using standard screw terminals.
Is it durable for industrial environments?
Yes, it's built with high-quality materials for long-term industrial reliability.
What warranty is included?
MRO Electric provides a 2-year warranty.
Is it available for immediate shipping?
Yes — this model is in stock and ships free immediately from MRO Electric.
Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at sales@mroelectric.com, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 3RH1921-1EA20, take a look at more from our Contactors line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 3RH1921-1EA20 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.
Very happy with the overall service, delivery, communication and delivery,
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