5V 2-Channel SSR G3MB-202P Solid State Relay Module - High Level Trigger for Arduino

Product Overview

Professional 2-channel solid state relay module featuring Omron G3MB-202P SSR components. This module provides reliable, silent switching of AC loads up to 240V using low-voltage 5V control signals from microcontrollers like Arduino, Raspberry Pi, or PLC systems. Perfect for controlling high-power AC devices safely and efficiently.

Key Features

• Genuine G3MB-202P SSR: High-quality Omron-style solid state relays
• 2 Independent Channels: Control two separate AC loads simultaneously
• 5V Logic Control: Direct connection to Arduino and other 5V microcontrollers
• High Level Trigger: Active when control signal is HIGH (5V)
• LED Indicators: Visual feedback for each channel's status
• No Mechanical Parts: Silent operation with no clicking sound
• Long Lifespan: No mechanical wear, millions of switching cycles
• Optical Isolation: 2500V isolation protects your control circuit
• Fast Switching: Microsecond response time
• Zero-Cross Detection: Reduces electrical noise and extends load life

Technical Specifications

Control Side (Input):

• Control Voltage: 5V DC
• Control Current: Approximately 20mA per channel
• Trigger Type: High level (active HIGH)
• LED Indicator: Yes (per channel)
• Connector: Standard pin headers for easy connection

Load Side (Output):

• Load Voltage: 100-240V AC
• Load Current: 2A per channel (maximum)
• Recommended Load: 1A or less for best reliability
• Switching Type: Zero-crossing
• Isolation Voltage: 2500V AC

Physical:

• Dimensions: Approximately 50mm x 33mm
• Mounting Holes: Yes (for secure installation)
• Screw Terminals: For easy AC wiring

Solid State Relay Advantages

• Silent Operation: No mechanical clicking or buzzing
• Faster Switching: Much quicker than electromagnetic relays
• Longer Lifespan: No contacts to wear out
• No Bounce: Clean switching without contact bounce
• Low EMI: Reduced electromagnetic interference
• Compact Size: Smaller than equivalent mechanical relays
• Lower Power Control: Requires less drive current

Applications

• Home automation lighting control
• AC appliance switching (fans, heaters, pumps)
• Temperature control systems
• Motor speed control (with proper circuit)
• Industrial equipment automation
• Smart home projects
• Stage lighting control
• HVAC system control
• Irrigation system automation
• Coffee machine and appliance timers

Wiring Instructions

Control Side:

• DC+ : Connect to 5V power supply
• DC- : Connect to ground (GND)
• CH1/CH2 : Connect to digital output pins on Arduino/microcontroller

Load Side:

• Input: Connect to AC power source (Live wire)
• Output: Connect to your AC load device
• Always follow local electrical codes and safety regulations

Safety Features

• Optical isolation protects control circuit from high voltage
• Built-in LED indicators show relay status
• Screw terminals ensure secure connections
• PCB-mounted components for reliability
• Zero-cross switching reduces electrical stress

Package Includes

• 1x 2-Channel SSR Solid State Relay Module (G3MB-202P)

Compatible With

• Arduino (UNO, Mega, Nano, etc.)
• Raspberry Pi (all models)
• ESP8266 / ESP32
• STM32 microcontrollers
• PIC microcontrollers
• PLC systems
• Any 5V logic controller

Important Safety Notes

⚠️ WARNING: This module switches HIGH VOLTAGE AC power

• Always disconnect power before wiring
• Use appropriate wire gauge for your load current
• Follow local electrical codes and regulations
• Do not exceed 2A load current per channel
• Ensure proper ventilation for heat dissipation
• Consider using a fuse for additional protection
• If unsure about AC wiring, consult a qualified electrician