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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH2911-2GA31 |
| Alternative Part Number | 3RH29112GA31 |
| Manufacturer | Siemens |
| Product Type | Auxiliary switch block |
| Suitable For Use With | Contactor relays |
| Size | S00 |
| Number of Contacts | 3 Normally Open (NO) + 1 Normally Closed (NC) |
| Current Path Configuration | 1 NO, 1 NC, 1 NO, 1 NO |
| Terminal Type | Spring-type terminals |
| Terminal Configuration | 53/54, 63/64, 73/74, 83/84 |
| Ambient Operating Temperature Range | -25 ... +60 °C during operation, -55 ... +80 °C during storage |
| 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 690 V with degree of pollution 3 |
| Surge Voltage Resistance | Rated value 6 kV |
| Mounting Type | Snap-on mounting |
| Dimensions (W x H x D) | 36 mm x 41.5 mm x 47.7 mm |
| Protection Class | IP20 on the front |
| Compliance | Positively driven operation acc. to IEC 60947-5-1, suitable for use with 3RH2 contactor relays |
| Commodity Code | 853650 |
The Siemens 3RH2911-2GA31 is a meticulously engineered auxiliary switch block designed to enhance the functionality of contactor relays. This component is part of the esteemed SIRIUS product family, known for its reliability and versatility in various industrial applications. The switch block features a front-mounted design with three normally open (NO) and one normally closed (NC) contact arrangements, providing a current path configuration of 1 NO, 1 NC, followed by two additional NO contacts.
Crafted for seamless integration, the 3RH2911-2GA31 is compatible with contactor relays of size S00 and is equipped with spring-type terminals for secure and straightforward connections. The terminals are designated as 53/54, 63/64, 73/74, and 83/84, ensuring a clear and organised wiring setup. This auxiliary switch block is physically coded to prevent incorrect combinations, and it is specifically designed to be combined with Siemens 3RH2140* and 3RH2440* contactor relays, adhering to the EN 50011 standard.
The unit boasts an impressive mechanical service life of typically 10 million switching cycles and an electrical endurance of 200,000 cycles at AC-15 at 230 V, highlighting its durability and long-term performance. The switch block operates reliably within an ambient temperature range of -25 to +60 °C, making it suitable for a wide range of operating environments.
Safety and quality are paramount, as evidenced by the 3RH2911-2GA31's insulation voltage rated at 690 V with a degree of pollution 3 and a surge voltage resistance of 6 kV. These specifications ensure that the switch block can handle the rigours of industrial electrical systems while maintaining the integrity of the auxiliary contacts.
The Siemens 3RH2911-2GA31 is a testament to the brand's commitment to innovation and excellence in industrial control components. It is an essential part for professionals seeking to optimise their control systems with a reliable and high-quality auxiliary switch block.
Commonly Asked Questions
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Frequently Asked Questions
What type of auxiliary switch is this?
This is an auxiliary switch designed to be mounted on the front of a device, featuring 3 normally open (NO) and 1 normally closed (NC) contacts.
Can this auxiliary switch be used with any contactor relay?
No, it is physically coded and can only be combined with specific contactor relays, namely the 3RH2140* and 3RH2440* series, according to EN 50011.
What is the protection class of this auxiliary switch?
The protection class for the front of this auxiliary switch is IP20.
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 °C and can be stored in temperatures ranging from -55 to +80 °C.
What is the mechanical service life of this auxiliary switch?
The mechanical service life of the auxiliary switch is typically 10 million switching cycles.
What is the electrical endurance of this auxiliary switch at AC-15, 230 V?
At AC-15, 230 V, the electrical endurance of the auxiliary switch is typically 200,000 switching cycles.
What is the insulation voltage rating for this auxiliary switch?
The insulation voltage with a degree of pollution 3 is rated at 690 V.
What is the surge voltage resistance of this auxiliary switch?
The surge voltage resistance of this auxiliary switch is rated at 6 kV.
What type of terminals does this auxiliary switch have?
This auxiliary switch is equipped with spring-type terminals.
Is there any specific product function related to safety for this auxiliary switch?
Yes, the auxiliary switch has a positively driven operation according to IEC 60947-5-1, which is a safety feature.
Part conditions explained
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