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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH2911-1FB22 |
| Alternative Part Number | 3RH29111FB22 |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch |
| Suitable Applications | Contactor Relay and Power Contactor |
| Protection Class | IP20 on the front |
| Ambient Operating Temperature | -25 to +60 °C during operation |
| Storage Temperature | -55 to +80 °C |
| Mechanical Service Life | Typical 10,000,000 switching cycles |
| Electrical Endurance | Typical 200,000 switching cycles at AC-15, 230 V |
| Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Insulation Voltage | Rated value of 690 V with degree of pollution 3 |
| Surge Voltage Resistance | Rated value of 6 kV |
| Auxiliary Circuit Contacts | 2 Normally Open (NO) + 2 Normally Closed (NC) |
| Mounting Type | Snap-on mounting |
| Dimensions (W x H x D) | 36 mm x 37.5 mm x 43.7 mm |
| Electrical Connection | Screw-type terminals |
| Connectable Conductor Cross-Sections | For auxiliary contacts: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) solid or stranded with wire end processing |
| Approvals | CE, UL, CSA, CCC |
The Siemens 3RH2911-1FB22 auxiliary switch is a versatile and reliable component designed for seamless integration with contactor relays and power contactors. Crafted to enhance the functionality of your control systems, this auxiliary switch block features a configuration of 2 normally open (NO) and 2 normally closed (NC) contacts, providing flexibility for various circuit designs.
With a robust construction that ensures a mechanical service life of approximately 10 million switching cycles, the 3RH2911-1FB22 is built to last, even in demanding industrial environments. Its electrical endurance is equally impressive, with an estimated 200,000 switching cycles at AC-15 at 230V, highlighting its durability and reliability for continuous operation.
The switch operates efficiently within a broad ambient temperature range, from as low as -25°C to as high as +60°C, ensuring consistent performance under varying conditions. The unit's insulation voltage is rated at 690V with a degree of pollution 3, and it boasts a surge voltage resistance of 6kV, providing additional protection against electrical disturbances.
Installation is straightforward, thanks to its snap-on mounting design, which allows for quick and easy attachment to the front of compatible devices. The switch's dimensions are compact, with a width of 36mm, height of 37.5mm, and depth of 43.7mm, making it a space-saving solution for your control panels.
The 3RH2911-1FB22 auxiliary switch is a testament to Siemens' commitment to quality and innovation, offering a reliable solution for enhancing control circuit functionality and operational efficiency in a variety of industrial applications.
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Frequently Asked Questions
What is the function of this auxiliary switch?
The auxiliary switch is designed to be snapped onto the front of contactor relays and power contactors, providing additional switching functions. It is commonly used to indicate the status of the main contactor or to switch a separate circuit in a control system.
Can you describe the protection class of this auxiliary switch?
This auxiliary switch has a protection class of IP20, which means it is protected against solid objects larger than 12.5mm but is not protected against water.
What are the ambient temperature limits for operating this auxiliary switch?
The auxiliary switch can operate within an ambient temperature range of -25 to +60 degrees Celsius during operation, and it can be stored in temperatures ranging from -55 to +80 degrees Celsius.
How many mechanical operating cycles can this auxiliary switch withstand?
The auxiliary switch is rated for typically 10 million mechanical operating cycles, indicating its durability and longevity in repetitive use.
What is the electrical endurance of this auxiliary switch at AC-15 at 230 V?
At AC-15 at 230 V, the auxiliary switch has an electrical endurance of typically 200,000 switching cycles.
What is the contact reliability of the auxiliary contacts?
The auxiliary contacts have a contact reliability of one faulty switching operation per 100 million operations at 17 V, 1 mA, which demonstrates a high level of reliability in low voltage applications.
What is the insulation voltage rating for this auxiliary switch?
The insulation voltage rating for the auxiliary switch is 690 V, with a degree of pollution 3, ensuring it can safely isolate in higher voltage environments.
What is the impulse voltage resistance of this auxiliary switch?
The auxiliary switch has an impulse voltage resistance rated value of 6 kV, which indicates its ability to withstand transient voltage spikes.
What are the dimensions required for mounting this auxiliary switch?
The auxiliary switch requires a width of 36 mm, a height of 37.5 mm, and a depth of 43.7 mm for mounting.
What type of electrical connection does this auxiliary switch use?
This auxiliary switch uses screw-type terminals for its electrical connections, which are suitable for a range of conductor cross-sections and provide a secure connection.
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