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Siemens
3RH1921-1XA22-0MA0
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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH1921-1XA22-0MA0 |
| Alternative Part Number | 3RH19211XA220MA0 |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch Block |
| Suitable Applications | Contactor relay and power contactor |
| Number of Contacts | 2 Normally Open (NO), 2 Normally Closed (NC) |
| Connection Type | Screw-type terminals |
| Mounting Type | Snap-on mounting |
| Protection Class IP | IP20 |
| Ambient Operating Temperature Range | -25 ... +60 °C during operation, -55 ... +80 °C during storage |
| Mechanical Service Life | Typically 10,000,000 switching cycles |
| Electrical Endurance | Typically 200,000 switching cycles at AC-15, 230 V |
| Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) for auxiliary contacts |
| Insulation Voltage | Rated at 690 V with degree of pollution 3 |
| Surge Voltage Resistance | Rated value 6 kV |
| Auxiliary Circuit Current Rating | At 24 V: 10 A, At 60 V: 3.5 A, At 110 V: 1.3 A, At 220 V: 0.9 A, At 440 V: 0.2 A, At 600 V: 0.1 A |
| Dimensions (Width x Height x Depth) | 44 mm x 38 mm x 51 mm |
| Product Function | Mirror contact according to IEC 60947-4-1 (with 3RT1) |
| Certificates/Approvals | General Product Approval, Functional Safety/Safety of Machinery, Declaration of Conformity |
The Siemens 3RH1921-1XA22-0MA0 is a high-quality auxiliary switch block designed for seamless integration with contactor relays and power contactors, specifically within the SIRIUS product range. This component is engineered to facilitate reliable switching operations in a variety of industrial applications.
Crafted with precision, the switch block features 2 normally open (NO) and 2 normally closed (NC) contacts, providing versatility for complex circuit configurations. The contacts are arranged with ordinal numbers 5 to 8, adhering to DIN EN 50012 standards, and are equipped with a 4-pole screw connection for secure and straightforward installation.
The auxiliary switch block boasts an impressive mechanical service life of typically 10 million switching cycles, ensuring longevity and consistent performance in demanding environments. Its electrical endurance is equally robust, with a typical rating of 200,000 switching cycles at AC-15, 230 V.
Safety and reliability are paramount in the design of the 3RH1921-1XA22-0MA0, which offers an insulation voltage rated at 690 V with a degree of pollution 3, and a surge voltage resistance rated at 6 kV. The switch block maintains contact reliability with a mere one faulty switching operation per 100 million, at 17 V and 1 mA, highlighting its precision and dependability.
Installation is made efficient with its snap-on mounting design, and the switch block's dimensions are compact, with a width of 44 mm, height of 38 mm, and depth of 51 mm, allowing for easy integration into existing systems without the need for extensive modifications.
The 3RH1921-1XA22-0MA0 is designed with screw-type terminals that accommodate a range of conductor cross-sections, ensuring compatibility with various wiring requirements. It also meets the mirror contact requirements according to IEC 60947-4-1 when used with 3RT1 contactors, although it does not support positively driven operation as per IEC 60947-5-1.
Overall, the Siemens 3RH1921-1XA22-0MA0 auxiliary switch block is a reliable and versatile component that offers exceptional performance and durability for industrial control applications.
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Frequently Asked Questions
What is the function of this auxiliary switch block?
The auxiliary switch block is designed to provide additional switching capabilities to contactor relays and power contactors. It features 2 normally open (NO) and 2 normally closed (NC) contacts that can be used for various control and signalling functions within an electrical circuit.
Can this auxiliary switch block be used with any contactor?
No, this auxiliary switch block is specifically designed for use with Siemens 3RT1 contactors, and it is suitable for sequence numbers 5 to 8.
What are the operating temperature limits for this auxiliary switch block?
The operating temperature range for this auxiliary switch block is from -25°C to +60°C during operation, and it can be stored at temperatures ranging from -55°C to +80°C.
What is the mechanical service life of this auxiliary switch block?
The mechanical service life of this auxiliary switch block is typically around 10 million switching cycles, indicating its durability and longevity.
What is the electrical endurance of this auxiliary switch block at AC-15, 230 V?
The electrical endurance of this auxiliary switch block at AC-15, 230 V is typically around 200,000 switching cycles.
How reliable are the contacts within this auxiliary switch block?
The contacts within this auxiliary switch block are highly reliable, with a contact reliability of 1 faulty switching per 100 million operations at 17 V, 1 mA.
What is the insulation voltage rating for this auxiliary switch block?
The insulation voltage rating for this auxiliary switch block, with a degree of pollution 3, is 690 V AC.
What is the surge voltage resistance of this auxiliary switch block?
The surge voltage resistance of this auxiliary switch block is rated at 6 kV.
How is this auxiliary switch block mounted?
This auxiliary switch block is designed for snap-on mounting, making it easy to install or replace on compatible contactors.
What type of electrical connection does this auxiliary switch block support?
This auxiliary switch block supports screw-type terminals for its electrical connections, accommodating various conductor cross-sections for auxiliary contacts.
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