| Order Code (Model) |
3RH1921-1CA01 |
| Product Portfolio |
SIRIUS Modular Electrical Control Infrastructure |
| Contact Layout Configuration |
1 Normally Closed (1NC) | 0 Normally Open (0NO) |
| Mounting Implementation |
Front Plate Snap-On Clip Placement (Toolless Mounting) |
| Physical Terminal Interface |
Heavy-Duty Rigid Screw Clamp Connections Matrix |
| Hardware Compatibility |
SIRIUS 3RT1 Contactors & 3RH11 Relays (Size S0 to S12) |
| Insulation Rated Voltage |
690 V AC Rated Circuit Boundary Standards |
| Mechanical Operation Life |
Up to 10 Million Reliable Operational Switching Cycles |
Performance Overview
The Siemens 3RH1921-1CA01 is an industrial-tier premium standard auxiliary switch extension block meticulously engineered within the flagship SIRIUS low-voltage modular control hardware network. Purpose-built to seamlessly expand auxiliary terminal signaling loops and safety interlocking architectures for primary power contactors, this highly durable add-on component manages a precise 1NC contact point fluidly. The optimized frontal latch structure enables quick, direct snap integration onto standard 3RT1 power contactors or 3RH11 control relays across multiple frame boundaries without taking up extra lateral panel tracks. Complete with premium screw clamp wiring terminal channels and high-grade electrical contact plating parameters, it sustains critical plant grid distributions with absolute operational consistency.
📋 Critical Application Check
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Industry: Centralized Motor Control Enclosures (MCC), Industrial Water Treatment Switchboards, Heavy Automation Assembly Line Safety Interlocking, Remote Fault Indicator Feedbacks.
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Front-Mount Space Efficiency: Direct frontal placement overrides the need for side expansion blocks, conserving essential horizontal spacing inside dense electrical distribution cabinet grids.
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Gas-Tight Screw Clamp Advantage: Robust mechanical screw channels lock heavy wiring cores reliably, resisting intense machinery resonance patterns and thermal expansions seamlessly.
Siemens SIRIUS Control Systems Integration:
