BESTEP 1-Channel Optocoupler Relay Module (3.3V / 5V / 12V / 24V Compatible) for Arduino & DIY Projects

Key Features

• Supports 3.3V / 5V / 12V / 24V control voltage versions (selectable model options)
• Built-in optocoupler isolation for safe signal separation and anti-interference
• High load capacity: AC 250V / 10A, DC 30V / 10A
• Low trigger current: only 5mA required
• Fault-tolerant design keeps relay OFF when control line is disconnected
• Dual LED indicators:
  • Green: Power status
  • Red: Relay working status
• Standard terminal interface for easy wiring and installation

Technical Specifications

• Channel: 1 Channel Relay Module
• Control Voltage Options: 3.3V / 5V / 12V / 24V (model dependent)
• Trigger Mode: Low-level trigger
• Isolation: Optocoupler isolation
• Output Rating:
  • AC: 250V / 10A
  • DC: 30V / 10A
• Trigger Current: ~5mA
• Interface Type: Screw terminal + pin header

Interface Description

Control Side

• DC+ : Power supply positive (match selected voltage version)
• DC- : Power supply ground
• IN : Signal input (low-level trigger, active LOW)

Relay Output Side

• NO : Normally Open (open before trigger, closed after activation)
• COM : Common terminal
• NC : Normally Closed (closed before trigger, open after activation)

Applications

• Arduino / Raspberry Pi / ESP32 automation projects
• Smart home control systems
• Motor / light / pump switching
• DIY electronics and industrial control
• IoT relay switching applications

Package Includes

• 1 × BESTEP 1-Channel Relay Module (selected voltage version)