A 4 Channel 5V High-Level Solid-State Relay (SSR) Module is commonly used for controlling high-voltage AC loads with a low-voltage digital signal, typically from a microcontroller like an Arduino or Raspberry Pi.
Specifications:
Relay Type: Solid State Relay (SSR)
Number of Channels: 4
Input Voltage (Control Side): 5V DC (high-level trigger)
Output Voltage (Load Side): 240V AC (maximum)
Output Current (Load Side): Up to 2A per channel
Trigger Voltage: 3.3V to 5V DC
Input Specifications:
Control Voltage: 3.3V to 5V DC
Control Current: 2mA to 20mA per channel (depending on the input voltage)
Trigger Type: High-level trigger (the relay is activated when the input signal is high, usually at 5V)
Input Indicators: LED indicators for each channel showing when the relay is active
Output Specifications:
Load Voltage: 75V to 240V AC
Load Current: 0.1A to 2A per channel (depending on the load and cooling)
Maximum Load: 500W per channel (with appropriate heat dissipation)
Zero-Crossing Detection: Typically included, ensuring the relay switches when the AC load voltage crosses zero to reduce noise and inrush current
Electrical Characteristics:
Isolation Voltage: 2500V between the input and output (optically isolated)
On-State Voltage Drop: Typically around 1.5V AC
Off-State Leakage Current: Less than 2mA
Switching Time:
Turn-On Time: Less than 10 ms
Turn-Off Time: Less than 10 ms
Environmental Specifications:
Operating Temperature: -30°C to +80°C
Storage Temperature: -40°C to +85°C
Humidity: 20% to 85% RH (non-condensing)
Connection Pins:
Input Side:
VCC: 5V DC input
GND: Ground
IN1 to IN4: Control signals for each relay channel
Output Side:
AC1, AC2, AC3, AC4: Normally open (NO) connections for each relay channel
AC Load: Connected in series with the AC load
Protection Features:
Optical Isolation: Ensures that the control side is electrically isolated from the load side, protecting the microcontroller or other control circuits.
Overvoltage Protection: Built-in protection against high voltage spikes.
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