The Siemens 3RF2050-1AA44 is a solid-state relay from the Siemens SIRIUS range, built for precise, high-speed switching in demanding automation and industrial environments. This 3-phase, 3-pole relay handles up to 50 A at 48-600 V AC, making it ideal for motor control, heating elements, and resistive loads where mechanical contactors would suffer from wear or arcing.
Why Siemens 3RF2050-1AA44 Stands Out
Unlike traditional electromechanical relays, the 3RF2050-1AA44 operates silently and without contact bounce, which dramatically increases operational lifespan. It uses zero-cross switching to reduce inrush current and electrical noise, enhancing the stability and longevity of connected loads. This makes it an excellent choice for applications requiring frequent switching, such as in packaging machinery, conveyors, and HVAC systems.
Performance and Quality
With a robust design, the Siemens 3RF2050-1AA44 solid-state relay offers high switching frequency capabilities and rapid response time. Its integrated heat sink allows for continuous duty even under full-load operation without external cooling, ensuring reliability and minimal maintenance downtime.
Key Features and Design Benefits
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Three-pole solid-state relay (SSR) for 3-phase loads
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Rated operating voltage: 48–600 V AC
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Load current capacity: 50 A
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Zero-cross switching for reduced harmonics and wear
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Integrated heat sink for efficient thermal management
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Panel mount design with compact footprint
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LED status indication for easy monitoring
Certifications and Compatibility
The Siemens 3RF2050-1AA44 complies with international safety and performance standards, including CE and UL, and is designed to integrate seamlessly into Siemens SIRIUS control systems or with other automation components.
📊 Technical Specifications
| Specification | Details |
|---|---|
| Operating Voltage | 48–600 V AC |
| Control Voltage | 24–230 V AC/DC |
| Rated Current | 50 A |
| Number of Poles | 3 (Three-phase) |
| Switching Type | Zero-cross |
| Mounting Type | Panel Mount |
| Dimensions (WxHxD) | Approx. 100 x 145 x 120 mm |
| Weight | ~1.3 kg |
| LED Indicator | Yes |
| Heat Sink | Integrated |
| Certifications | CE, UL, CSA, RoHS compliant |
🔧 Product Attributes
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Brand: Siemens
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Model Number: 3RF2050-1AA44
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Voltage: 48–600 V AC
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Load Current: 50 A
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Technology Type: Solid-State (SSR)
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Control Voltage: 24–230 V AC/DC
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Mounting: Panel mount
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Poles: 3
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Switching Mode: Zero-cross
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Warranty Period: Typically 12–24 months (check supplier)
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Country of Origin: Germany
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