The Siemens 3RV2901-1E Auxiliary Contact Block is a premium accessory designed for SIRIUS 3RV2 Motor Protection Circuit Breakers (MPCBs). This front-mounted auxiliary switch expands the functionality of motor protection devices by providing 1 Normally Open (NO) contact and 1 Normally Closed (NC) contact, making it ideal for signaling, status indication, control interlocking, PLC interfacing, and industrial automation applications.
Designed specifically for Siemens 3RV2 motor starter protectors and motor protection circuit breakers, the 3RV2901-1E mounts directly onto the front of the breaker without increasing the overall width of the assembly. Its compact design helps save panel space while enabling additional control and monitoring functions. Installation is simple and tool-free, making it ideal for both new installations and retrofit applications.
The auxiliary switch features a 1NO + 1NC contact configuration, allowing operators to implement motor status feedback, remote monitoring, alarm signaling, safety interlocking, and control circuit functions. These instantaneous auxiliary contacts provide reliable switching performance and improve system visibility in motor control centers and industrial automation systems.
The 3RV2901-1E Auxiliary Contact Block utilizes durable screw terminal connections, ensuring secure wiring and long-term reliability even in demanding industrial environments. The screw terminal design simplifies installation and maintenance while maintaining excellent electrical continuity and vibration resistance.
Compatible with Siemens 3RV2 motor protectors in sizes S00, S0, S2, and S3, this auxiliary contact block offers broad application flexibility across motor control and protection systems. It is commonly used in manufacturing plants, motor control centers (MCCs), HVAC systems, water treatment facilities, process industries, packaging machinery, and OEM equipment.
As part of the trusted Siemens SIRIUS motor control portfolio, the 3RV2901-1E delivers dependable performance and seamless integration with Siemens motor protection products. It enables improved control logic, fault indication, operational monitoring, and automation system integration while maintaining the high-quality standards expected from Siemens industrial components.
| Specification | Details |
|---|---|
| Product Name | Auxiliary Contact Block |
| Brand | Siemens |
| Series | SIRIUS 3RV2 |
| Model Number | 3RV2901-1E |
| SKU | 3RV2901-1E |
| Product Type | Auxiliary Contact Block |
| Contact Configuration | 1NO + 1NC |
| Number of Contacts | 2 |
| Mounting Position | Front Mounted (Transverse) |
| Compatible Series | Siemens 3RV2 Motor Protection Circuit Breakers |
| Compatible Sizes | S00, S0, S2, S3 |
| Connection Type | Screw Terminals |
| Contact Type | Instantaneous Auxiliary Contacts |
| Rated Operational Current (AC-15, 230V) | 0.5A |
| Rated Voltage | 230V AC |
| Application | Signaling, Status Indication, Interlocking, PLC Interface |
| Installation Method | Direct Snap-On Mounting |
| Product Family | Siemens SIRIUS Accessories |
| Standards Compliance | IEC/EN 60947-5-1 |
| Protection Rating | IP20 |
| Industrial Applications | MCC Panels, Motor Starters, Automation Systems, Control Panels |
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