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A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±10 A range with galvanic isolation. It features a high-sensitivity analog VOUT output with a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and its low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5450
ACS37042 Micro Carrier is a compact module based on the Allegro current sensor, utilizing Hall effect technology and providing galvanic isolation for measurement. The device features a very low current path resistance of ~1.6 mΩ, minimizing energy losses and ensuring high accuracy for both DC and AC current measurements. The analog output offers a wide 150 kHz bandwidth, enabling fast and precise current measurement in dynamic systems. The sensor response time is less than 5 µs, making it ideal for applications requiring rapid response.

The module has five essential pins: current inputs IP+ and IP-, logic supply VDD and GND, and signal output VOUT. Power should be connected to the VDD and GND pads marked on the bottom of the board. The VOUT output generates an analog signal with a resting voltage of 1.65 V, which changes proportionally to the input current. Positive current increases the output voltage, while negative current decreases it, with a sensitivity of 132 mV/A.
The board can be integrated into the current path in various ways depending on the application. In typical high-current applications, wires can be soldered directly to the mounting holes. These holes are also compatible with screw terminals with a 3.5 mm or 5 mm pitch, making it easy to install the module in both prototype and final setups. Alternatively, goldpin connectors can be used.

The sensor provides integrated temperature compensation, improving accuracy across the full operating temperature range of -40°C to 125°C, in compliance with automotive standards. The device is non-ratiometric, meaning its zero point and sensitivity are independent of supply voltage fluctuations, ensuring noise immunity. The module is designed to operate at 3.0 V to 3.6 V and supports a bidirectional measurement range of -10 A to +10 A. Thanks to its compact size, it is ideal for small-scale projects.
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Pin header goldpin black 1x40 pins. Angled connector for through-hole assembly. 2.54mm pitch.
2-pin ARK mounting strip, 3.5 mm pitch. 381-3.5-02P-14-00AH. Set of 10 pieces
Compact current sensor Pololu 5310 based on the CT433-HSWF20MR, designed for measuring currents up to ±20A at 3.3V supply in applications requiring galvanic isolation and analog voltage output. Pololu 5310
Compact current sensor Pololu 5311 based on the CT433-HSWF30MR, designed for measuring currents up to ±30A at 3.3V supply in applications requiring galvanic isolation and analog voltage output. Pololu 5311
Compact current sensor Pololu 5313 based on the CT433-HSWF50MR, designed for measuring currents up to ±50A at 3.3V supply in applications requiring galvanic isolation and analog voltage output. Pololu 5313
Compact current sensor Pololu 5315 based on the CT433-HSWF70MR, designed for measuring currents up to ±70 A at a 3.3 V supply in applications requiring galvanic isolation and analog voltage output. Pololu 5315
The Pololu 5318 current sensor provides electrically isolated unidirectional AC and DC current measurement from 0 A to 50 A. Based on the Allegro CT433-HSWF50DR with TMR technology, the module offers up to 1 MHz bandwidth and an analog interface. Pololu 5318
Pololu 5319 current sensor provides electrically isolated DC current measurement in the range of 0 A to 65 A. Based on the Allegro CT433-HSWF65DR sensor, the module uses TMR technology and offers a bandwidth of up to 1 MHz together with an analog interface. Pololu 5319
Current sensor Pololu 5322 enables electrically isolated AC and DC current measurement in the range from -50 A to +50 A. The module is based on the Allegro CT432-HSWF50MR TMR sensor IC and provides up to 1 MHz bandwidth with an analog interface. Pololu 5322
Pololu 5323 current sensor provides electrically isolated AC and DC current measurement in the range of -65 A to +65 A. Based on the Allegro CT432-HSWF65MR sensor, the module uses TMR technology and offers a bandwidth of up to 1 MHz together with an analog interface. Pololu 5323
Pololu 5326 current sensor provides electrically isolated DC current measurement in the range of 0 A to 50 A. Based on the Allegro CT432-HSWF50DR sensor, the module utilizes TMR technology, offering a 1 MHz bandwidth and an analog interface. Pololu 5326
Pololu 5242 with the ACS71240KEXBLT-050B3 chip is a compact current sensor module for precision measurement applications in the ±50 A range. With galvanic isolation, fast response to current changes, and short-circuit detection capability, it is used in power systems, automotive and industrial electronics, and embedded projects. It is ideal for measuring currents in both DC and AC circuits while ensuring safety and accuracy.
Pololu 5328 current sensor provides electrically isolated DC current measurement in the range of 0 A to 70 A. Based on the Allegro CT432-HSWF70DR sensor, the module utilizes TMR technology, offering a 1 MHz bandwidth and an analog interface. Pololu 5328
Pololu 5333 current sensor provides electrically isolated AC and DC current measurement in the range of -50 A to +50 A. Based on the Allegro CT433-HSWF50MR sensor, the module utilizes TMR technology, offering a 1 MHz bandwidth and an analog output signal.
Pololu 5335 current sensor provides electrically isolated AC and DC current measurement in the range of -70 A to +70 A. Based on the Allegro CT433-HSWF70MR sensor, the module utilizes TMR technology, offering a 1 MHz bandwidth and an analog voltage output.
The module enables unidirectional AC and DC current measurement over a range from 0 A to 50 A. XtremeSense™ TMR technology, an electrically isolated current path, 1 MHz bandwidth, and an analogue voltage output support use in systems requiring fast current measurement and high dV/dt immunity. Pololu CT433-HSWF50DR Large Carrier 0–50 A, 3.3 V
The module enables unidirectional AC and DC current measurement over a range from 0 A to 65 A. XtremeSense™ TMR technology, an electrically isolated current path, 1 MHz bandwidth, and an analogue voltage output support use in systems requiring fast current measurement and high dV/dt immunity. Pololu CT433-HSWF65DR Large Carrier 0–65 A, 3.3 V
The INA3221 module, which allows simultaneous measurement of voltage and current for three power supplies via I2C with ±1% precision. With a 13-bit ADC and built-in 0.05Ω shunt resistors, it allows accurate monitoring of currents up to ±3.2A and voltages up to +26VDC. Adafruit 6062
A compact Hall-effect current sensor that provides accurate DC and AC current measurement within a ±10 A range with galvanic isolation. It features a high-sensitivity analog VOUT output with a 150 kHz bandwidth, enabling fast and precise readings in dynamic systems. The module operates over a wide temperature range of -40°C to 125°C, and its low current path resistance (~1.6 mΩ) minimizes energy loss. Its small size and flexible mounting options make it ideal for prototyping, industrial systems, and space-constrained projects. Pololu 5450