5V Relay Module 30A - 1 Channel

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*Disclaimer: The images are merely illustrative.

The 5V 30A 1-Channel Relay Module is a compact solution for controlling electrical loads from low-voltage control systems.

The module incorporates a high-power relay with a 5 V DC coil, allowing higher-voltage or higher-current loads to be controlled from an electronic control circuit. The relay provides an SPDT changeover contact, with COM (Common), NO (Normally Open) and NC (Normally Closed) terminals.

According to the specifications for this module, the relay contacts can switch loads up to 30 A at 250 V AC or 30 A at 30 V DC.

The module uses optocoupler isolation between the control circuit and relay section, helping to electrically isolate the control signal from the switched circuit. The trigger mode can be selected using the onboard jumper, allowing either LOW-level or HIGH-level triggering.

Screw terminals are provided for easy connection of the power supply, control signal and switched load. Four mounting holes allow the module to be installed directly inside an enclosure, control panel or project structure without requiring a DIN rail.

It is suitable for automation systems, lighting control, motors, solenoid valves, electrical equipment, Arduino, Raspberry Pi, PLCs and other electronic control applications requiring a high-current relay interface.

Key features

• 1 relay channel
• 5 V DC operating voltage
• Relay contact rating up to 30 A
• COM / NO / NC contacts
• Maximum specified switching voltage: 250 V AC / 30 V DC
• Optocoupler isolation
• Selectable HIGH / LOW trigger
• Approx. 5 mA trigger current
• Screw terminals
• 4 mounting holes
• Compact design
• Suitable for AC and DC loads
• Suitable for automation and electronics projects

Technical specifications

The dimensions, weight, mounting holes, trigger current and HIGH/LOW trigger configuration are based on the manufacturer's published specifications for this module.

Connections

DC+
Positive power supply input.

DC−
Negative power supply input.

IN
Control signal input.

H/L jumper
Selects the trigger mode:

• L: LOW-level trigger
• H: HIGH-level trigger

COM
Common relay contact.

NO – Normally Open
Normally open contact. It connects to COM when the relay is activated.

NC – Normally Closed
Normally closed contact. It remains connected to COM when the relay is not activated.

The terminal functions correspond to the manufacturer's description of this module.

Applications

• Lighting control
• Home automation
• Industrial automation
• Motor control
• Solenoid valve control
• Pumps and control systems
• Electrical equipment
• Arduino projects
• Raspberry Pi projects
• PLC systems
• Custom control systems
• AC or DC load switching

Compatibility

The module can be integrated into control systems providing 5 V DC power and a compatible control signal.

Suitable for:

• Arduino
• Raspberry Pi
• Microcontrollers
• PLCs
• Automation systems
• Custom electronic circuits

Important safety information

The 30 A / 250 V AC and 30 A / 30 V DC figures represent the maximum specified contact ratings of the relay. Loads operating close to these limits require appropriate consideration of load type, inrush current, wiring, terminals, cooling and installation conditions.