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Description
BDD RELAY BOARD 4CH 3.3V3,3V 4 Channel High Low Level Triger Relay Module with Optocoupler High Low Level Triger Relay Module Features Maximum load: AC 250V 10A, DC 30V 10A. The chip optocoupler isolation, strong driving ability, stable performance, trigger current 5mA. Working voltage is 3. 3V. Every channel of the module can be set up by high jumper or low level trigger. Fault tolerant design, even if the control line is broken, the relay will not act. Power indicator
3,3V 4 Channel High/Low Level Triger Relay Module with Optocoupler
High/Low Level Triger Relay Module
Features
- Maximum load: AC 250V/10A, DC 30V/10A.
- The chip optocoupler isolation, strong driving ability, stable performance, trigger current 5mA.
- Working voltage is 3.3V.
- Every channel of the module can be set up by high jumper or low level trigger.
- Fault tolerant design, even if the control line is broken, the relay will not act.
- Power indicator (green), 4 relay status indicator (red).
- The interface design is humanized, all interfaces can be directly connected through the terminals, so it is very convenient.
- Module size: 73mm x 50mm x 18.5mm (length x width x height).
- There are 4 fixed bolt holes, holes 3.1mm, spacing 67mm x 44.5mm.
Specifications
- DC+: Connect the power positive pole.
- DC-: Connect the power negative pole.
- IN1-IN4: According to the setting of each way, the corresponding relay-operating can be controlled by high or low level.
Relay output: there is a 12 wire interface, all interfaces can be directly connected to lead to facilitate user use.
- NO1--NO4: Relay normally open, the relay suspends before pulling in, and then short-connect with the COM.
- COM1--COM4: Relay common interface
- NC1--NC4: Relay normal close, short connected with COM before pulling inand suspended after pulling in.
High and low level trigger option:
- S1-S4 is the high level trigger selection of relay 1 Channel - 4 Channel.
- When COM is short connected with LOW, the corresponding relay is LOW level trigger, while when COM is short connected with high end is high level trigger.
Additional Information
| Device | Relay Module |
| Type | High/Low | Level Triger |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Great prom suit
Size: X-Small, Color: Royal Blue-3pieces
The quality is awesome. Just needed a few alterations and my done is set for the prom
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2026
★★★★★ 5
Fun alternative to traditional tuxedo
Size: Large, Color: Black-2 Pieces, Size: Large, Color: Black-2 Pieces
Fairly good quality. Hubby wore this as fun alternative to his regular tux in a cruise elegant night. Looked sharp and we even got family pictures in it.
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Reviewed in the United States on September 13, 2025
★★★★★ 5
Great for price ⭐
Size: Small, Color: Blue-2 Pieces, Size: Small, Color: Blue-2 Pieces
Bought this for my son's junior prom and it looked so good on him. I had to get a few alterations done because it was a bit too big for him but all in all great quality for the price.
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Reviewed in the United States on June 8, 2025
★★★★★ 5
Ready for the “Wild Elegamce “ ball!
Color: Red, Size: X-Large, Color: Red, Size: X-Large
It runs a little small so even though I usually wear a large, the extra large is good for me as recommended by other buyers. It’s going to be perfect for iur “Wild Elegamce” fundraiser ball in October!
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Looks better than the picture
Color: Red, Size: X-Large
Fits as sized
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Reviewed in the United States on May 31, 2026