steve
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Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 months ago
3RH1921-1KA20
Siemens 3RH1921-1KA20 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3RH1921-1KA20 is a high-quality auxiliary switch designed for seamless integration with contactors in the 3RT1 series. This second lateral auxiliary switch features two normally open (NO) contacts, providing reliable performance for various industrial applications. Engineered with precision, it utilises screw terminals for secure and straightforward connections, ensuring ease of installation and maintenance. The switch is part of the renowned SIRIUS range, known for its durability and efficiency. With a robust mechanical service life of up to 10 million switching cycles and an electrical endurance of 200,000 cycles at AC-15 at 230 V, this auxiliary switch is built to withstand demanding operational environments. Its compact design, with dimensions of 10 mm in width, 80 mm in height, and 71 mm in depth, allows for efficient use of space in control panels. The Siemens 3RH1921-1KA20 is an ideal choice for enhancing the functionality of contactor systems, offering dependable auxiliary contact performance.
| Specification | Description |
|---|---|
| Part Number | 3RH1921-1KA20 |
| Manufacturer | Siemens |
| Product Brand Name | SIRIUS |
| Product Category | Auxiliary Switch |
| Product Designation | Auxiliary switch |
| Design of the Product | Second can be mounted laterally |
| Suitability for Use | For contactors 3RT10, 3RT12, 3RT145, 3RT146, 3RT147 |
| Insulation Voltage | 500 V (with degree of pollution 3 at AC rated value) |
| Surge Voltage Resistance | 6 kV |
| Protection Class IP | IP20 (on the front) |
| Mechanical Service Life | 10,000,000 operating cycles |
| Electrical Endurance | 200,000 operating cycles at AC-15 at 230 V |
| Number of NO Contacts | 2 instantaneous contacts |
| Operational Current at AC-12 | 10 A at 24 V and 230 V |
| Operational Current at AC-15 | 6 A at 24 V and 230 V, 3 A at 400 V |
| Operational Current at DC-12 | 10 A at 24 V, 3 A at 110 V, 1 A at 220 V |
| Fastening Method | Snap-on mounting |
| Dimensions | Width: 10 mm, Height: 80 mm, Depth: 71 mm |
| Type of Electrical Connection | Screw-type terminals |
| Connectable Conductor | Finely stranded with core end processing: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²); AWG cables: 2x (20 ... 16), 2x (18 ... 14) |
| Product Function | Mirror contact according to IEC 60947-4-1 |
| Ambient Temperature | -25 to +60 °C during operation, -55 to +80 °C during storage |
| Weight | 0.05 kg |
This Siemens auxiliary switch, part number 3RH1921-1KA20, is a reliable component designed for use with specific contactors. It features two normally open contacts and is built to endure extensive mechanical and electrical cycles. With a compact design, it is easy to mount and connect, making it a versatile choice for various industrial applications.
What is the function of this auxiliary switch?
This auxiliary switch is designed to be mounted laterally and provides two normally open (NO) contacts for use with contactors, specifically the 3RT1 series.
What is the operational current capacity of the auxiliary contacts?
The auxiliary contacts can handle an operational current of up to 10 A at AC-12 for both 24 V and 230 V.
What is the mechanical service life of this auxiliary switch?
The mechanical service life of this auxiliary switch is typically 10 million operating cycles.
What is the protection class of this auxiliary switch?
The auxiliary switch has a protection class of IP20 on the front, making it suitable for use in environments where it is protected from solid objects larger than 12.5 mm.
What are the dimensions of this auxiliary switch?
The auxiliary switch measures 10 mm in width, 80 mm in height, and 71 mm in depth.
What type of terminals does this auxiliary switch use?
This auxiliary switch uses screw-type terminals for electrical connections.
What is the rated insulation voltage of this auxiliary switch?
The rated insulation voltage of this auxiliary switch is 500 V with a degree of pollution 3.
Can this auxiliary switch be used with contactor relays?
Yes, this auxiliary switch is suitable for use with both contactor relays and power contactors.
What is the electrical endurance of this auxiliary switch at AC-15 at 230 V?
The electrical endurance of this auxiliary switch at AC-15 at 230 V is typically 200,000 operating cycles.
Does this auxiliary switch have any normally closed (NC) contacts?
No, this auxiliary switch is equipped with two normally open (NO) contacts and does not have any normally closed (NC) contacts.
- Used in industrial automation systems for controlling contactor relays.
- Suitable for integration in power contactor assemblies.
- Commonly employed in electrical control panels for auxiliary switching functions.
- Utilized in machinery requiring reliable auxiliary contact operations.
- Ideal for applications needing additional NO (normally open) contacts in control circuits.
- Frequently used in conjunction with Siemens 3RT1 contactors for enhanced functionality.
- Applicable in environments where IP20 protection is sufficient.
- Suitable for use in systems requiring high mechanical endurance and electrical endurance.
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
5 months ago
Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
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Paulo Pereira
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Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
5 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
5 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
6 months ago
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