Overview
The Carlo Gavazzi RM1A23D50 is a 1-pole industrial solid state relay (SSR) with zero-crossing switching technology designed for AC load control in demanding industrial environments. This panel-mount relay combines reliable thyristor output with built-in transient protection, making it suitable for resistive, inductive, and capacitive loads across manufacturing, HVAC, heating, and process control applications.
Key Features
- Zero-Crossing Switching: Switches at AC sine wave zero crossing for reduced electromagnetic interference and smoother operation
- Wide Load Range: Handles 50 A at 230 VAC (AC-51 duty) and 15 A at 230 VAC (AC-53a inductive loads)
- Low DC Control Voltage: 3–32 VDC input for compatibility with logic controllers, sensors, and low-voltage control circuits
- Built-In Protection: Varistor overvoltage protection and LED status indication for control input monitoring
- Robust Design: Direct copper bonding (DCB) technology, IP20 protection cover, self-lifting screw terminals, and aluminum base plate for durability
- Compact Panel Mount: DIN rail, panel, or wall-mountable with tool-free installation
Technical Specifications
The RM1A23D50 meets industrial certification standards (CE, CSA, cURus, CCC, EAC) and provides galvanic isolation exceeding 4000 VAC RMS between control and load circuits. Zero-crossing switching eliminates in-rush surge current, reducing wear on contactor coils and heat generation compared to electromechanical relays.
Typical Applications
- 3-phase motor speed control and soft-starting
- Heater and heating element switching
- Solenoid valve and pump control
- Industrial lighting circuits
- Process equipment ON/OFF sequencing
- HVAC and refrigeration system control
Compatibility & Replacements
Compatible With
- PLC and logic controller 3–32 VDC outputs
- Analog and digital sensor inputs (relay contact closure or active low signal)
- DIN-rail industrial control panels
- Standard 35 mm DIN rail mounting systems
- 24 V AC/DC industrial power supplies
- Phase control applications with proportional DC signals
Replaces / Drop-In Replacement For
The RM1A23D50 may serve as a replacement for electromechanical relays and older solid-state relays in 50 A @ 230 VAC switching applications. Verify control voltage (3–32 VDC), load type (resistive, inductive, capacitive), and duty cycle (AC-51 or AC-53a) compatibility with your system integrator before ordering to ensure proper operation and warranty coverage.
Works With
- Rockwell Automation Allen-Bradley CompactLogix, ControlLogix, and MicroLogix PLC systems
- Siemens S7-1200, S7-1500, and SIMATIC logic controllers
- Omron CP series and NX series automation platforms
- Mitsubishi FX and Q series programmable controllers
- Schneider Electric TeSys and Altivar drives (as load switching interface)
- Low-voltage (3–32 VDC) discrete control circuits and relay modules
- EtherNet/IP and PROFINET gateway modules with analog/digital I/O for signal integration
