RBDimmer AC Dimmer Module 24A, 3.3V/5V Logic with Current Sensor and Temperature Control (24A-Current Control)

Advanced AC Dimmer Module with Intelligent Thermal Management and current load measurement (optional) The RBDimmer.com 16A/24A Active Cooling Series is a premium DIY AC dimmer module designed for demanding automation projects. Featuring a large aluminum heatsink and smart temperature-controlled fan, this module delivers reliable performance for heaters, motors, pumps, and ventilation systems in both residential and industrial applications. Four Versions to Match Your Requirements: - 16A Standard – Mid-power dimming with intelligent thermal management. The integrated temperature sensor monitors TRIAC heat levels and automatically controls fan speed – running quietly at low loads and ramping up cooling when needed. Includes overheat protection alerts to prevent damage. - 24A Standard – Higher power capacity with the same smart cooling system. Ideal for applications requiring extended operation at higher currents while maintaining efficient, noise-optimized cooling. - 16A with Current Sensor – Adds high-precision current monitoring to the standard features. Track real-time power consumption, log energy usage over time, calculate electricity costs in your currency, and set current limits to prevent overloads. The rbpowerESP32 library on GitHub provides full access to energy data. - 24A with Current Sensor – Maximum power capacity combined with comprehensive energy monitoring. Perfect for industrial applications, energy auditing projects, and smart systems that need both high current handling and detailed consumption analytics. Intelligent Thermal Management The onboard temperature sensor continuously monitors TRIAC thermal conditions and dynamically adjusts cooling fan speed. At light loads, the fan operates quietly or turns off completely to save energy. Under heavy loads, cooling automatically increases to maintain safe operating temperatures. If critical thresholds are approached, the system alerts your microcontroller to reduce power or shut down – protecting your investment and connected equipment. Smooth, Reliable Load Control True phase-angle control provides flicker-free dimming across the entire power range. No mechanical relay clicking, no abrupt switching – just clean, software-defined power regulation. Ideal for heating elements requiring precise temperature control, variable-speed fan applications, soft-start motor control, and any load benefiting from gradual power adjustment. Complete Software Ecosystem The rbdimmerESP32 library handles all timing-critical dimming operations for Arduino and ESP-IDF platforms. For current sensor versions, rbpowerESP32 adds energy monitoring, cost calculation, and consumption logging. Both integrate seamlessly with ESPHome for Home Assistant and support Tasmota firmware for cloud-based automation. What's Included: AC Dimmer Module (selected variant), access to online documentation, wiring diagrams, Arduino libraries, and example projects.

• INTELLIGENT ACTIVE COOLING SYSTEM – Large aluminum heatsink with smart temperature-controlled fan. Integrated sensor monitors TRIAC temperature in real-time, automatically adjusting fan speed: quiet operation at low loads, maximum cooling under heavy use, and overheat protection alerts to prevent component damage.
• TWO POWER OPTIONS: 16A OR 24A – Choose the right capacity for your project. Both versions handle heaters, single-phase motors, pumps, fans, and ventilation systems with smooth phase-angle control for precise voltage regulation – not just on/off switching.
• CURRENT SENSOR OPTION FOR POWER MONITORING – Upgraded versions include high-precision current sensing for real-time power measurement, energy tracking by hour/day/month/year, electricity cost calculation, and automatic current limiting to prevent overloads. Perfect for energy management projects.
• ARDUINO & ESP32 COMPATIBLE – Supports 3.3V and 5V logic levels for direct connection to Arduino, ESP32, STM32, and Raspberry Pi. Use rbdimmerESP32 library for dimming control and rbpowerESP32 library for energy monitoring. Ready for ESPHome, Tasmota, and Home Assistant integration.
• SAFE ISOLATED DESIGN – Complete galvanic isolation between high-voltage AC section and low-voltage control circuit protects your microcontroller. Zero-cross detection ensures quiet, reliable operation with minimized electrical interference and extended component lifespan.