BMT 30A Single Channel High Current 5V Relay Module Opto Isolated Switch

The BMT 5V 30A Single Channel Relay Module is a heavy-duty, high-performance switching solution designed for demanding power control applications. Built around a genuine 30A high-current relay and featuring opto-isolated input protection, this module delivers reliable, stable, and safe operation when controlling high-power AC and DC loads.

This relay board is fully compatible with Arduino, microcontrollers, PLC systems, and 5V logic devices, making it ideal for automation systems, robotics, industrial control, smart home projects, and high-current switching applications.

With its high/low level trigger selection jumper, the module offers flexible control logic configuration, allowing seamless integration into different system designs. The optocoupler isolation provides excellent electrical noise protection and signal stability, ensuring long-term reliability even in electrically noisy environments.

The relay contacts support both Normally Open (NO) and Normally Closed (NC) configurations, allowing versatile load control options. Heavy-duty screw terminals enable secure connections for high-current wiring, making installation simple and safe.

Key Features

• High-Power Switching Capacity
  AC 250V / 30A
  DC 30V / 30A
• Opto-Isolated Input Circuit
  Improved noise immunity
  Enhanced system protection
  Stable and reliable triggering
• 5V Operating Voltage
  Fully compatible with Arduino and 5V MCU platforms
• Selectable Trigger Mode
  High-level or Low-level trigger via jumper
• Low Trigger Current
  Trigger current: 2-4mA
  Quiescent current: 5mA
• User-Friendly Terminal Design
  Secure screw terminals for power and signal connections
  Easy wiring and installation
• Industrial-Grade Build Quality
  Strong driving capability
  Stable long-term performance
  Robust PCB construction

Technical Specifications

• Relay Voltage: 5V
• Maximum Load:
  AC 250V / 30A
  DC 30V / 30A
• Maximum Current: 190mA
• Trigger Current: 2-4mA
• Quiescent Current: 5mA
• Module Dimensions:
  72 × 40 × 24 mm
  With holder: 86 × 43 × 45 mm
• Weight: 46g
• Mounting Holes:
  4 × holes, Ø 3.1mm
  Spacing: 44.5 × 27.5mm

Interface Description

• DC+ Module power supply positive
• DC- Module power supply negative
• IN Trigger signal input
• NC Normally Closed contact
• COM Common contact
• NO Normally Open contact

Trigger Mode Selection:

• Jumper on L Low-level trigger
• Jumper on H High-level trigger

Typical Applications

• Arduino automation projects
• High-power device control
• Smart home switching systems
• Industrial automation
• Robotics power control
• Motor, pump, heater, and lighting control
• Power distribution switching
• Test equipment and lab automation

What's in the box
1 x BMT 5V 30A Single Channel High Current Relay Module with Opto Isolation