Avatto ZWSM16-DC-1 Smart ZigBee 3.0 1-Channel Switch Module with Voltage-Free Dry Contact

In the heart of any modern smart home, reliable control of high-power devices is paramount. The Avatto ZWSM16-DC-1 is a compact ZigBee 3.0 relay module that switches up to 16A through a potential-free dry contact, offering a flexible and safe solution for retrofitting existing wiring or adding smart control to lamps, pumps, and other appliances.

Overview

This 1-channel switch module from Avatto sits inside standard in-wall switch boxes or junction boxes, replacing a conventional relay while adding wireless connectivity. It communicates over ZigBee 3.0 with a compatible hub and works seamlessly with the Tuya Smart and Smart Life apps, enabling remote control, scheduling, timers, and scene automation. Voice control is available through Amazon Alexa and Google Assistant when paired with a ZigBee hub.

What stands out

• Voltage-free dry contact: a physical relay contact that does not supply power, ensuring compatibility with a wide range of circuits.
• 16A high switching capacity: handles resistive loads up to 16A at 250V AC or 30V DC.
• ZigBee 3.0 connectivity: a mature, mesh-capable wireless standard for reliable smart home integration.
• Works with Tuya Smart and Smart Life apps, plus Alexa and Google Assistant via a ZigBee hub.
• Compact 39.2 x 39.2 x 18 mm housing: ideal for retrofit installations in tight spaces.
• Wide input voltage range: accepts AC 85-250V, 50/60Hz for universal compatibility.

Technical details

• Model: ZWSM16-DC-1
• Connectivity: ZigBee 3.0 (IEEE 802.15.4)
• Channels: 1
• Contact type: Dry contact / voltage-free
• Max load: 16A (resistive) @ 250V AC / 30V DC
• Input power: AC 85-250V, 50/60Hz
• Operating temperature: -10°C to 40°C
• Operating humidity: 10% to 90% RH (non-condensing)
• Dimensions: 39.2 x 39.2 x 18 mm
• Certification: CE, RoHS
• Material: PC V0 fire-retardant

Our verdict

The Avatto ZWSM16-DC-1 is an excellent choice for electricians and smart home enthusiasts who need a robust, compact 1-channel relay with a true dry contact. Its high 16A rating, broad voltage support, and wide compatibility with ZigBee hubs and major voice assistants make it a versatile building block for home automation.