Overview
The Carlo Gavazzi RM1A23D50 is a 1-pole panel mount solid state relay (SSR) designed for dependable switching of AC loads in industrial control applications. Operating voltage ranges from 24–265 VAC with a rated current of 50 Aac, and control voltage from 3–32 VDC. This relay utilizes back-to-back SCRs to switch power to/from AC loads, which minimizes overall power dissipation and increases the solid state relay’s ability to withstand surge currents.
Key Features
- Zero-cross switching for reduced EMI and smooth load transitions
- Built-in overvoltage protection with metal oxide varistor (MOV)
- Green LED indicator for input status visibility
- Protective touch-safe cover with IP20 rating
- High current capacity: 50 Amp / 24–265 VAC output @ 40°C
- Suitable for resistive, inductive, and capacitive loads
- Direct copper bonding (DBC) and SMD technology for superior thermal performance
- UL recognized, CSA certified, CE compliant
Technical Specifications
- Manufacturer: Carlo Gavazzi
- Series: RM1A
- Switching Mode: Zero-crossing
- Output Type: Back-to-back SCR (antiparallel thyristor)
- Poles: 1 pole (SPST)
- Rated Output Current: 50 A AC (AC-51 duty)
- Output Voltage Range: 24–265 VAC (650 Vp peak)
- Control Voltage Input: 3–32 VDC
- Control Current: ≤12 mA at maximum input voltage
- Mounting Style: Panel mount with screw terminals
- Operating Temperature: –20 to +70 °C
- Housing Material: NORYL GFN 1 black plastic with aluminum base plate
- Non-repetitive Peak Voltage: Up to 1600 Vp
- Optical Isolation: >4000 VAC rms
- Opto-coupler: Zero-crossing optical isolator
Typical Applications
Designed for superior performance and reliability in demanding industrial applications, the RM1A23D50 is commonly used for:
- Process heating control and temperature management
- Industrial motor control and soft-starting
- Lighting dimmer and ballast control
- HVAC and chiller load switching
- Conveyor and pump motor control
- Machinery automation and supervisory switching
- PLC and DCS output module replacement
- UPS and power supply switching
Compatibility & Replacements
Compatible With
- PLC output modules requiring DC control signals (3–32 VDC logic)
- Programmable controllers and industrial control systems with relay-driver outputs
- Temperature controllers, pressure switches, and sensor-based control logic
- AC power distribution and load control circuits (24–265 VAC)
- Industrial automation networks and HMI systems
- Standard panel-mount control enclosures with screw-terminal wiring
Replaces / Drop-In Replacement For
The RM1A23D50 is a direct replacement for other 50A panel-mount zero-crossing SSRs in the RM1A series. Verify compatibility with your system integrator before ordering if replacing a different SSR series or rated current.
Works With
- Optional DIN rail or panel-mount heatsinks (standalone or pre-assembled configurations)
- Thermal pads and fork terminals designed for RM, RAM, and RS series relays
- Standard industrial screw-terminal wiring and panel-mount enclosures
- Overvoltage surge suppressors and transient protection devices
- LED indicators and control circuit monitoring (LED on input cover)
