# Hall Current Sensor Module, WCS1800, AC-DC, 35A, 5V

> WCS1800 Hall current sensor module, for 5V systems, 5V DC supply voltage. Measures without breaking the circuit, the conductor passes through the module's hole. Analog output AOUT proportional to current, for bidirectional DC up to +/-35A and AC up to 25A, linearity 60mV/A. Digital output DOUT TTL with threshold adjustable via potentiometer (0.5A-35A) and overcurrent LED indicator. Board size 37x31mm.

- Page: https://sigmanortec.ro/en/hall-current-sensor-module-wcs1800-ac-dc-35a-5v
- Price: 56.16 RON
- Availability: In stock; 1-2 zile
- Reference: 88250 · EAN: 5941299511332
- Category: Mechatronics and IoT > Sensors and Modules > Voltage and Current Sensors
- Specifications: tension: NEEDLE; Supply voltage: 5 V; Sensor chip: WCS1800; Maximum measured current: 35 A
- Package (shipping data): 0.015 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:03 (Europe/Bucharest)

## Description

Hall current sensor for Arduino and 5V systems, measures without breaking the circuit by passing the conductor through the hole. Offers proportional analog output AOUT for bidirectional DC monitoring up to +/-35A and AC up to 25A, plus digital output DOUT with adjustable threshold from potentiometer for overcurrent alarm, with LED indicator.
The WCS1800 module is a Hall current sensor, compatible with Arduino and other 5V development boards, simple and practical, with two useful outputs for automation and protection. On the analog output AOUT it provides a voltage signal proportional to the measured current, ideal for ADC reading and continuous monitoring. On the digital output DOUT it provides a TTL threshold-type signal, where you can set the limit current from the potentiometer, and when the actual current exceeds the threshold, the output switches and the overcurrent LED lights up.
The sensor allows measurement without interrupting the circuit; pass the conductor through the module's hole and you can monitor bidirectional DC current up to +/-35A or AC current up to 25A on the analog output.
DOUT can only be used with DC current because DOUT is a comparator output on a threshold, and the AC signal periodically goes above and below the threshold each half-cycle, which causes DOUT to rapidly switch between 0 and 1 and no longer provide a stable, useful level. For AC on analog with the WCS1800 you use AOUT in ADC and calculate the amplitude or RMS, since AOUT is a voltage centered on Vcc/2 that oscillates around it.
It is suitable for consumption monitoring, overload detection, overcurrent protection, motor control, and power management systems.
Specifications:
Supply voltage: DC 5V
Analog current detection range: DC +/-35A
Analog current detection range: AC 25A
Linearity: 60mV/A
DOUT limit current range: 0.5A-35A
Outputs: Analog AOUT
Outputs: TTL DOUT
Indicator: Overcurrent LED
Board size: 37x31mm
Pinout:
Pin
Name
Type
Role
VCC
Power supply plus
Power
5V DC
DOUT
Digital output
TTL
High or low depending on the set threshold
GND
Ground
Common 0V
AOUT
Analog output
Analog
Voltage proportional to current
Usage:
Turn off the power before installation.
Pass a single conductor through the sensor hole, respecting the direction indicated by the arrow on the module.
Connect VCC to 5V and GND to the common ground with the microcontroller.
For continuous measurement, connect AOUT to an ADC pin.
For threshold alarm, connect DOUT to a digital pin.
Setting DOUT threshold with LED:
Set the desired current in the circuit, for example 1A.
Slowly turn the potentiometer until the LED just lights up, then stop adjusting.
After setting, at current above the threshold, DOUT switches to high level according to the module.
For stable results, calibrate at zero current and avoid strong external magnetic field sources near the module.
Current-voltage relation on AOUT:
Formula: Vout = Vcc0.5 ± IaK
Vcc: 5V
K: 60mV/A
Ia: measured current, with sign depending on direction
Example at 1A, Vcc 5V:
positive direction: Vout = 2.5 + 0.06 = 2.56V
negative direction: Vout = 2.5 - 0.06 = 2.44V