Really confused by the VCC in, is it 5V as in the description or 12V? I am applying 5V DC on VCC and 3V signal without a click on the relays.

The relay attached to your question requires 12vdc input to the coil. They are available with 5vdc coil input voltage. Hope this helps.

Is there an on-board way to make both relays work simultaneously, aside from a jumper wire between the two IN ports?

I’m not sure I really follow the purpose of your “ Without a Jumper “ . To make both work together they need to be linked OR the device you are triggering from needs to send 2 independent triggers. If the objective is just to avoid a physical jumper then the other option is a solder link on the underside.

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4pcs DC 5V Relay Module 2 Channel Relay Board with Optocoupler Support High or Low Level Trigger

Product ID: 361376111

Details

Connector Type
Through Hole
Contact Material
Nickel
Contact Type
Normally Open
Current Rating
10 Amps
Mounting Type
Through Hole

⚡5V DC coil voltage

🔌10A max switching current

🛡️Optocoupler isolation for stable triggers

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Description

⚡ Empower your projects with precision switching — never miss a beat!

HIGH LOAD HANDLING - Switch up to 250V AC or 30V DC at 10A — perfect for demanding projects.
LOW TRIGGER CURRENT - Activates with just 5mA, saving power and boosting efficiency.
ROCK SOLID RELIABILITY - Optocoupler isolation ensures fault-tolerant, stable switching every time.
DUAL CHANNEL POWERHOUSE - Control two high-current circuits independently with ease.
PLUG PLAY COMPATIBILITY - Standard interfaces and screw terminals make microcontroller integration seamless.

The AEDIKO 4pcs 2-Channel 5V Relay Module features optocoupler isolation for stable, fault-tolerant switching, supports high loads up to 10A at 250V AC/30V DC, and offers easy integration with microcontrollers via screw terminals. Ideal for Arduino and other DIY electronics, it delivers reliable performance with low trigger current requirements.

Specifications

ASIN	B099MC4TJD
Best Sellers Rank	#30,651 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #815 in Industrial Electrical Controls & Indicators
Brand	AEDIKO
Brand Name	AEDIKO
Coil Voltage	5 volts_of_direct_current
Connector Type	Through Hole
Contact Current Rating	10 A
Contact Material	Nickel
Contact Type	Normally Open, Normally Closed
Current Rating	10 A
Customer Reviews	4.4 out of 5 stars 66 Reviews
Included Components	module
Manufacturer	AEDIKO
Maximum Switching Current	10 A
Maximum Switching Voltage	250 volts
Minimum Switching Voltage	5 volts_of_direct_current
Model	AE06233
Number of Items	1
Operation Mode	Off
Part Number	AE06233
Specification Met	RoHS
UPC	701715485006

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E£ 1641

Duties & taxes included

In stock

Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to EGYPT.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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