Description
Reviews
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 5V DC |
| Current Sensing Range | 5A / 20A / 30A Options |
| Sensitivity | 185mV/A (5A), 100mV/A (20A), 66mV/A (30A) |
| Output Type | Analog Voltage |
| Isolation Voltage | 2.1kV RMS |
| Operating Temperature | -40°C to 85°C |
| PCB Dimensions | 32mm x 13mm x 14mm |
| Weight | 5 grams |
| Compatibility | Arduino, Raspberry Pi, STM32 |
| Package Content | 1x Sensor Module, 1x Pin Header Strip |
Anonymous
Apr 04, 2026
Rating: 3/5
Okay for low precision tasks
It works, but don't expect lab-grade accuracy. There is some drift depending on temperature. Good for learning though.
Anonymous
Mar 30, 2026
Rating: 4/5
Good value but needs filtering
The sensor is accurate enough for hobby use. I had to add a capacitor to smooth out the noise in the analog reading.
Anonymous
Mar 03, 2026
Rating: 5/5
Fast shipping and well packaged
Arrived quickly and was protected well in anti-static bag. Pin headers were included which was a nice touch.
Anonymous
Feb 23, 2026
Rating: 5/5
Great for motor current sensing
I am using this to monitor a DC motor current. The isolation gives me peace of mind when connecting to microcontrollers.
Anonymous
Feb 19, 2026
Rating: 5/5
Perfect for Arduino Projects
Works exactly as described. I used the 20A version for a battery monitor and the readings are stable after calibration.
Q: Can this sensor measure AC current?
A: Yes, the ACS712 can measure both AC and DC current. You will need to process the analog signal appropriately in your code for AC.
Q: What is the response time of the sensor?
A: The typical output rise time is 5 microseconds, making it suitable for most real-time monitoring applications.
Q: What is the output voltage at zero current?
A: The output voltage at zero current is typically VCC / 2, which is around 2.5V when powered by 5V.
Q: Does the package include screw terminals for high current wiring?
A: No, this module uses heavy gauge copper pads for current flow. You should solder your wires directly to the pads for best contact.
Q: Is this module compatible with 3.3V logic microcontrollers?
A: Yes, the output is analog. However, ensure your MCU ADC reference voltage is compatible or use a voltage divider for the output signal.
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