Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Type	Hall Effect Current Sensor
Available Ranges	5A, 20A, 30A
Operating Voltage	5V DC
Output Sensitivity (5A)	185 mV/A
Output Sensitivity (20A)	100 mV/A
Output Sensitivity (30A)	66 mV/A
Bandwidth	80 kHz
Response Time	5 µs
Isolation Voltage	2.1 kV RMS
Package Type	Breakout Board with Header Pins

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Ideal for solar monitoring

I am using the 20A version to monitor my small solar panel output. It handles the current spikes well and the isolation gives me peace of mind.

Anonymous

Mar 17, 2026

Rating: 5/5

Compact and effective

Very compact design fits easily into tight enclosures. The 5A model is surprisingly sensitive and great for low-power consumption tracking.

Anonymous

Mar 11, 2026

Rating: 4/5

Good value but needs calibration

The sensor is accurate enough for general use, but you definitely need to calibrate it against a known load for precise measurements. The build quality is solid.

Anonymous

Mar 10, 2026

Rating: 5/5

Perfect for Arduino projects

This module works flawlessly with my Arduino Uno. The calibration was straightforward, and the readings are stable. Great for monitoring battery discharge rates.

Anonymous

Mar 09, 2026

Rating: 5/5

Reliable for student projects

Bought ten of these for our robotics club. They are durable and easy to solder. Students found the documentation online very helpful for integration.

Anonymous

Mar 07, 2026

Rating: 3/5

Works but noisy output

The sensor functions as described, but I noticed some noise in the output signal. I had to add a capacitor to smooth the reading. Otherwise, it's okay for the price.

5 FAQ

Q: Does the 30A version overheat at continuous 25A load?

A: The sensor is rated for up to 30A, but running near the maximum limit continuously may cause heating. We recommend ensuring adequate airflow or using a heatsink for loads above 20A.

Q: Can this module measure AC current as well as DC?

A: Yes, the ACS712 sensor can measure both AC and DC current. The output voltage will vary around the VCC/2 baseline depending on the direction and type of current.

Q: Is there a library available for Raspberry Pi?

A: Since this is an analog sensor, it does not connect directly to the digital GPIO of a Raspberry Pi without an ADC (like MCP3008). Once connected via ADC, standard Python libraries for that ADC can be used to read the values.

Q: What is the accuracy tolerance of this sensor?

A: The typical total error is around ±1.5% to ±2% at room temperature, but this can vary slightly based on the specific range (5A, 20A, or 30A) and external electromagnetic interference.

Q: What is the exact pinout for connecting this to an ESP32?

A: Connect the VCC pin to 5V (or 3.3V if your specific board supports it, though 5V is recommended for stability), GND to GND, and the OUT pin to any analog GPIO pin on the ESP32.

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