Pololu
ACS724 Current Sensor Carrier -50A to +50A
The ACS724 Current Sensor Carrier provides a compact breakout for Allegro's ±50A ACS724LLCTR-50AB Hall effect-based linear current sensor. It offers a low-re...
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The ACS724 Current Sensor Carrier provides a compact breakout for Allegro's ±50A ACS724LLCTR-50AB Hall effect-based linear current sensor. It offers a low-resistance (~1.2 mΩ) current path and electrical isolation up to 2.4 kV RMS, making it suitable for high-current monitoring in motors, power supplies, and industrial applications.
This bidirectional sensor accepts current up to ±50A and outputs a proportional analogue voltage centred at 2.5V, which can be read directly by an Arduino or other microcontroller. The carrier board includes bypass capacitors and is designed for use in 5V systems.
Key Features
- ±50A Bidirectional Range – Measures high current flowing in both directions
- 40 mV/A Sensitivity – Proportional analogue output centred at 2.5V
- High Isolation – Electrical isolation up to 2.4 kV RMS
- Low Resistance – ~1.2 mΩ current path for minimal circuit impact
- High Accuracy – Typical error of ±0.8%
- Compact Carrier Board – Includes bypass capacitors, ready to use
Specifications
- Sensor IC: ACS724LLCTR-50AB
- Supply Voltage: 4.5V – 5.5V DC
- Current Range: -50A to +50A
- Sensitivity: 40 mV/A
- Output Voltage: 2.5V at 0A (ratiometric)
- Isolation: 2.4 kV RMS
- Path Resistance: ~1.2 mΩ
- Typical Error: ±0.8%
Also Available
- ACS711EX Current Sensor Carrier – ±31A
- ACS714 Current Sensor Carrier – ±5A
- ACS712 Current Sensor – 5A
- ACS712 Current Sensor – 20A
- Gravity: Analog Current Sensor 50A (AC/DC) V2
Ideal For
- High-current motor control and monitoring
- Industrial power supply monitoring
- Electric vehicle battery management
- Solar inverter current sensing
- Over-current protection in high-power circuits
Package Contents
- 1× ACS724 Current Sensor Carrier Board (±50A)
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- RMS
- RMS is a way of describing the effective level of an AC signal, such as an audio output voltage. It helps compare audio output levels more meaningfully than a peak voltage number.
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