i noticed this has ac and dc power inputs. can i operate 2 ac lights and 2 dc fans simultaneously

Important to note that the outputs have NOTHING to do with the power supplied to the unit on the 4CH Pro and 4CH Pro R2. Supplied power is for the electronics only. You will need additional power source(s) - in addition to the power for the electronics -for the devices you are controlling via the relays/switches.

What are the differences between 4ch, 4ch pro, 4ch r2 and 4ch r2 pro?

Just by looking at the pics and specs displayed it appears that the two 4CH units (WITHOUT PRO) use the same power source (90-220 AC) for the electronics AND the connected devices). Both the models with PRO use the supplied power ONLY for the electronics and you would supply power separately to the external devices controlled by the switches.

What is the amperage limit / ampacity of this unit?

This is 10 amp /loaf with a wifi. & 433 MHz

How do you change modes between interlocking, self locking and inching?

Hello that is done with the DIP switches. I don't have the manual in front of me but if you go to the webpage for the device you can get a PDF version. If I remember correctly it was better than the one on the box and clearly showed how to set them.

Sonoff 4CH Pro R3 Wi-Fi Smart Switch 4-Channel Din Rail Mounting Home Automation,Self-Locking/Interlock Control Home Appliances, RF/APP/Voice/LAN Control, Works with Alexa

产品编号: 402194015

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细节

Connector type
Clamp
Contact type
Normally Open
Current rating
10 Amps
Operating voltage
120 Volts
Operation mode
automatic

📶Wi-Fi + RF + Voice control

🔌4 independent channels

⚙️3 versatile working modes

描述

⚡ Elevate your smart home game with 4-channel power at your fingertips!

TRIPLE MODE FLEXIBILITY - Switch seamlessly between self-locking, interlock, and inching modes via app.
VOICE APP COMMAND READY - Works flawlessly with Alexa, Google Home, and RF remote for hands-free control.
MASTER YOUR HOME APPLIANCES - Control 4 devices independently or in smart modes for ultimate convenience.
DIN RAIL MOUNTING FOR PRO SETUP - Sleek, space-saving installation perfect for modern smart homes and professional setups.
RELIABLE AUTOMATION WITH TIMERS - Set up to 8 countdown timers that run even offline, ensuring your schedule never misses a beat.

The Sonoff 4CH Pro R3 is a professional-grade 4-channel Wi-Fi smart switch designed for DIN rail mounting. It offers independent control of four home appliances with three advanced working modes—self-locking, interlock, and inching—accessible directly via the eWeLink app. Compatible with Alexa, Google Home, and RF remote, it supports voice commands and remote control. Featuring 8 programmable countdown timers that operate offline, it ensures reliable automation. Rated for 10A and 8800W, it’s built with durable materials and meets CE and FCC standards, making it a top-tier choice for smart home enthusiasts and professionals alike.

规格

ASIN	B08BHWF8KD
Actuator Type	electronic
Best Sellers Rank	#12,369 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #36 in Smart & Remote Controlled Plugs
Brand Name	SONOFF
Circuit Type	parallel
Color	white
Connectivity Protocol	Wi-Fi
Connector Type	Clamp
Contact Material	Copper
Contact Type	Normally Open
Control Method	Remote, Voice
Controller Type	Amazon Alexa
Current Rating	10 Amps
Customer Reviews	4.6 4.6 out of 5 stars (292)
Global Trade Identification Number	07898717250008
International Protection Rating	IP54
Item Dimensions	14.5 x 9 x 4 centimeters
Item Weight	0.1 Kilograms
Lower Temperature Rating	1 Degrees Celsius
Manufacturer	SONOFF
Material Type	Acrylonitrile Butadiene Styrene
Model	4CHPROR3
Mounting Type	DIN Rail Mount
Number of Positions	4
Operating Voltage	120 Volts
Operation Mode	automatic
Specification Met	CE, FCC
Switch Type	Electronic" Or "Smart
Terminal	Clamp
Unit Count	1 Count
Wattage	8800 watts

D**U

As describe

Working good

7.02.2026

U**A

Exelente producto para automatizar el límite es tu imaginación tengo un año usando y funciona al 100

12.09.2025

C**S

Recebido no prazo e funcionando corretamente.

24.11.2022

I**G

FANTASTIC SWITCH!!! i love this thing. it was easy to install. simple to setup. just the way i like it!! works like a charm. ive been using mine for the last 2 years or so. looking at getting a couple more pretty soon. dont pass this switch up. it was an amazing find!!

25.07.2025

I**D

Working great

8.10.2020

O**S

muito bom para automação da casa funciona perfeitamente

2.02.2022

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