AC Dimmer Module 4A for Arduino ESP32 Compact TRIAC Dimmer 400V 4A 3 3V 5V Logic Phase Control

About this item

• COMPACT LOW-POWER AC DIMMING – Control AC loads up to 4A at 400V with smooth phase-angle regulation. Perfect for dimmable incandescent lights, small fans, pumps, air purifiers, and low-power heating elements. True voltage control, not just on/off switching.
• ULTRA-COMPACT DESIGN – Tiny footprint (60 × 20 × 20 mm) fits easily into small enclosures and tight spaces. Ideal for DIY smart switches, lamp controllers, and space-constrained automation projects where larger modules won't fit.
• ARDUINO & ESP32 COMPATIBLE – Supports 3.3V, 5V, and 12V logic levels for universal microcontroller compatibility. Works with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and more. Ready-to-use rbdimmerESP32 library simplifies coding with example projects.
• SMART HOME INTEGRATION – Direct compatibility with ESPHome for Home Assistant, Tasmota firmware, and custom automation platforms. Build voice-controlled lighting, scheduled operations, and energy-saving routines through your preferred smart home ecosystem.
• SAFE OPTOCOUPLER ISOLATION – Complete electrical separation between high-voltage AC and low-voltage control circuit protects your microcontroller. Zero-cross detection output enables precise timing synchronization for flicker-free dimming.
• Compact AC Dimmer Module for Light-Duty Automation Projects The RBDimmer.com 4A Module is a compact, affordable AC dimmer designed for makers and hobbyists who need smooth voltage control for low-power AC loads. This DIY module connects to your microcontroller to enable precise dimming of incandescent lights, small fans, pumps, and other appliances up to 4A. Small Size, Big Possibilities Measuring just 60 × 20 × 20 mm, this is one of the most compact AC dimmers available. The tiny footprint makes it perfect for projects where space is limited: custom smart wall switches, lamp controllers, small appliance automation, or any application requiring a discreet installation. Smooth, Flicker-Free Control The BTA136 TRIAC delivers true phase-angle dimming for smooth brightness transitions. Unlike relay-based solutions that only switch on and off, this module provides continuous voltage regulation across the entire range. Create gradual COMPACT LOW-POWER AC DIMMING – Control AC loads up to 4A at 400V with smooth phase-angle regulation. Perfect for dimmable incandescent lights, small fans, pumps, air purifiers, and low-power heating elements. True voltage control, not just on/off switching.;