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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH1921-2DE11 |
| Alternative Part Number | 3RH19212DE11 |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch Block |
| Application | For Contactor Relay and Power Contactor |
| Insulation Voltage | 500 V |
| Operating Current | 10 A |
| Dimensions | 18.3 x 70.7 x 80 mm |
| Mounting Type | Snap-on mounting |
| Number of Contacts | 1 Normally Open (NO), 1 Normally Closed (NC) |
| Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Mechanical Operating Cycles | 5,000,000 typical |
| Electrical Operating Cycles | 200,000 at AC-15, at 230 V typical |
| Ambient Operating Temperature | -25 … +60 °C during operation |
| Storage Temperature | -55 … +80 °C |
| Protection Class | IP20 on the front |
| Connection Type | Spring-loaded terminals |
| Conductor Cross-section | 2x (0.5 ... 1.5 mm²) finely stranded with core end processing, 2x (0.5 ... 2.5 mm²) without |
| Compliance | Mirror contact according to IEC 60947-4-1, Positively driven operation according to IEC 60947-5-1 (No) |
| Surge Voltage Resistance | Rated value 6 kV |
The Siemens 3RH1921-2DE11 is a high-quality auxiliary switch block designed for seamless integration with contactor relays and power contactors. This component is essential for a variety of industrial applications where reliable switching operations are critical. With an insulation voltage rated at 500 V and operational capabilities of 10 A, it ensures robust performance in demanding environments.
Crafted with precision, the switch block measures 18.3 x 70.7 x 80 mm, making it compact enough to fit into various setups without compromising on functionality. The unit features a snap-on mounting design for ease of installation and maintenance. It is equipped with spring-loaded terminals that facilitate secure and efficient electrical connections, accommodating a range of conductor cross-sections.
The 3RH1921-2DE11 is engineered to withstand a wide range of ambient temperatures, from as low as -25°C to as high as +60°C during operation, ensuring reliability across diverse operating conditions. It boasts an impressive mechanical service life, capable of up to 5 million switching cycles, highlighting its durability and longevity.
This auxiliary switch block is not only robust but also designed with safety in mind, featuring a mirror contact function in accordance with IEC 60947-4-1 standards. However, it does not support positively driven operation as per IEC 60947-5-1. Its construction adheres to a protection class of IP20, safeguarding the internal components from external factors.
The Siemens 3RH1921-2DE11 auxiliary switch block is a testament to Siemens' commitment to quality, reliability, and performance, making it a valuable component in the industrial controls sector.
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Frequently Asked Questions
What is the insulation voltage rating for this auxiliary switch block?
The insulation voltage rating for the auxiliary switch block is 500 V, with a degree of pollution 3.
Can this auxiliary switch block be used with any contactor relay or power contactor?
This auxiliary switch block is designed for use with specific Siemens contactor relays and power contactors, particularly the 3RT1 series.
What is the ambient operating temperature range for this component?
The ambient operating temperature range for this component is between -25 °C and +60 °C.
How many mechanical operating cycles can this auxiliary switch block withstand?
The auxiliary switch block can typically withstand 5,000,000 mechanical operating cycles.
What type of terminals does this auxiliary switch block have for connection?
This auxiliary switch block is equipped with spring-loaded terminals for the auxiliary and control circuit connections.
What are the dimensions of this auxiliary switch block?
The dimensions of the auxiliary switch block are 18.3 mm in width, 70.7 mm in height, and 80 mm in depth.
What is the contact reliability for the auxiliary contacts of this switch block?
The contact reliability for the auxiliary contacts is rated at 1 faulty switching per 100 million operations at 17 V, 1 mA.
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 onto compatible devices.
What is the function of the mirror contact feature in this auxiliary switch block?
The mirror contact feature ensures that the auxiliary contacts provide a reliable indication of the state of the main contacts, complying with IEC 60947-4-1 standards.
