A
Anonymous
Apr 01, 2026
Rating: 5/5
Accurate Reading
Very happy with the accuracy compared to my multimeter. Easy to interface with ESP32.
Description
20A Range ACS712 Sensor Module - 22 Years of Component Expertise
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Brand | TELESKY |
| Model Number | ACS712-20A |
| Current Sensing Range | ±20A |
| Sensitivity | 100mV/A |
| Supply Voltage | 5V DC |
| Output Type | Analog Voltage |
| Bandwidth | 80kHz |
| Primary Conductor Resistance | 1.2mΩ |
| Operating Temperature | -40°C to 85°C |
| PCB Dimensions | 32mm x 13mm |
5 reviews
A
Anonymous
Mar 12, 2026
Rating: 5/5
Fast Delivery
Module arrived quickly and works perfectly for my power monitoring setup. Recommended.
A
Anonymous
Feb 05, 2026
Rating: 4/5
Good Value
Needs some calibration in the code but works well for the price. Shipping was fast.
A
Anonymous
Feb 03, 2026
Rating: 3/5
Noisy Output
Had to add a capacitor to smooth out the analog signal. Works better after filtering.
A
Anonymous
Jan 19, 2026
Rating: 5/5
Great for Arduino Projects
Works exactly as described. Used it to monitor motor current in my robotics project and the readings are stable.
5 FAQ
Q: Can it measure DC current?
A: Yes, the ACS712 measures both AC and DC current effectively within the 20A range.
Q: Does it come with pin headers soldered?
A: Yes, pin headers are included and typically pre-soldered for easy breadboard use.
Q: Is there electrical isolation between the sensor and the circuit?
A: Yes, the Hall effect technology provides 1.2kV isolation between the current path and the signal pins.
Q: What is the zero current output voltage?
A: Typically VCC/2, so approximately 2.5V when no current is flowing through the sensor.
Q: Is this compatible with 3.3V logic microcontrollers?
A: The module operates at 5V. If using with 3.3V logic, ensure the analog input pin is 5V tolerant or use a voltage divider.
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