Attributes

Brand	-
Category	3C Digital Accessories / MP3/MP4 Stands
Origin	-
Sensor Model	ACHS-7122
Current Range	+/- 20A
Supply Voltage	3.3V - 5.5V
Output Type	Analog Voltage
Bandwidth	80 kHz
Response Time	5 µs
Operating Temperature	-40°C to +85°C
Isolation Voltage	2.1 kV RMS
Board Dimensions	25mm x 18mm
Connector Type	Standard 0.1" Header

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Accurate and compact

The form factor is small enough to fit into tight enclosures. Calibration was straightforward, and the noise level on the output is very low. Exactly what I needed for my battery management system prototype.

Anonymous

Mar 27, 2026

Rating: 5/5

Perfect for my power monitoring project

This development board works exactly as described. The ACHS-7122 sensor provides stable readings and was easy to interface with my microcontroller. Great for measuring current in low-voltage DC circuits.

Anonymous

Mar 14, 2026

Rating: 5/5

Essential component for motor control

Using this to monitor current draw on my rover's drive motors. It reacts quickly to load changes and helps prevent stall conditions. Fast shipping and secure packaging too.

Anonymous

Mar 13, 2026

Rating: 4/5

Good value, clear documentation

Solid build quality and the pinout is clearly marked. I appreciated the included schematic link. Only minor issue was the shipping took a day longer than expected, but the product itself is excellent.

Anonymous

Mar 05, 2026

Rating: 4/5

Works well with Arduino

Plug-and-play compatibility with most 5V logic boards. The analog output scales linearly as expected. I deducted one star simply because the mounting holes are a bit small for standard standoffs.

Anonymous

Mar 02, 2026

Rating: 5/5

Reliable sensor for student projects

We bought several of these for our electronics lab. They handle the +/- 20A range well without overheating during standard tests. Highly recommend for educational purposes.

5 FAQ

Q: Is there a protection fuse on the board?

A: The board itself does not include an onboard resettable fuse; we recommend adding external circuit protection appropriate for your specific application's maximum current limits.

Q: Is this board compatible with 3.3V microcontrollers like the ESP32?

A: Yes, the board operates within a 3.3V to 5.5V supply range, making it fully compatible with 3.3V logic systems such as the ESP32 or STM32.

Q: Does the package include headers for soldering?

A: Yes, each board comes with a set of male header pins included in the package, though they are not pre-soldered to allow for flexible mounting options.

Q: Can this measure AC current or only DC?

A: This sensor can measure both AC and DC currents within its +/- 20A range. The output will be an analog voltage centered at VCC/2 for AC signals.

Q: What is the accuracy rating of the ACHS-7122 sensor on this board?

A: The ACHS-7122 typically offers an initial accuracy of around 1.5% at room temperature. Please refer to the datasheet linked in the product description for detailed error charts.

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