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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 21 reviews
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Product Reviews
★★★★★ 5
Socks
Size: Medium, Color: Beige/Cream/Green
These socks are great. Love them. Very warm too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
★★★★★ 5
good but pricey
Size: X-Large, Color: White / Steel - 100
good materials, size fits, very soft and durable but is a bit expensive
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Great socks great price
Size: Large, Color: Black
Great socks
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Really snug, but not uncomfortable
Size: Large, Color: Black
I don't know why these were so much tighter than all the other UA socks I've bought over the years. Not uncomfortable, just really tight when putting them on.
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Great quality
Size: X-Large, Color: Black
Teenager loves these socks!
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Reviewed in the United States on May 22, 2026
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