Original WCS2702 Hall Effect based Linear Current Sensor (0-2.0A)
Original WCS2702 Hall Effect Linear Current Sensor (02A) Technical Information
Overview
The WCS2702 is a Hall-effect based linear current sensor designed for precise AC and DC current measurement up to 2A.
Provides analog voltage output proportional to current
Offers electrical isolation between input current path and output signal
Suitable for low-current, high-precision applications
It belongs to the Winson WCS series of current sensors
Working Principle
Current flows through an internal conductor (low resistance path)
Generates a magnetic field
Integrated Hall sensor detects magnetic field
Internal circuitry converts it into proportional analoge input current
Measurement Characteristics
Current Range:
DC: 0 to 2A
AC: up to ~1.4A RMS
Sensitivity:
1 mV per mA (or 1 V per 1A)
Zero Current Output:
~Vcc / 2 (2.5V at 5V supply)
Allows bidirectional current measurement
Electrical Characteristics
Supply Voltage: 3.0V 12V
Operating Current: ~36 mA
Internal Conductor Resistance: ~98 m
Low resistance reduced power loss
Output Characteristics
Type: Analog voltage output
Ratiometric Output: Scales with supply voltage
Bandwidth: ~10 kHz
Suitable f galvanic isolation (~1000V) between:
Current path
Signal output
Eliminates need for opto-isolators
Performance Characteristics
Low noise analog signal path
Low temperature drift
Nearly zero magnetic hysteresis
Ensures stable and repeatable measurements
Internal Structure
Linear Hall-effect sensor IC
Temperature compensation circuit
Low-resistance current conductor
Signal conditioning and amplification stage
Functional Behavior
Measures both AC and DC current
Outputs linear analog voltage
Output increases/decreases based on:
Current magnitude
Current direction
Key Technical Features
2A current measur
Electrical isolation (1000V)
Low conductor resistance (98 m)
Wide supply voltage range
Analog linear output
Low power consumption
10 kHz bandwidth
Advantages
High accuracy for low-current sensing
No shunt resistor no insertion loss issues
Electrically isolated measurement
Simple analog interface
Limitations
Limited to low current (2A max)
Analog output requires:
ADC for microcontroller use
Sensitive to external magnetic interference
Needs proper filtering for noise-sensitive applications
Applications
Battery monitoring systems
Low-current load measurement
Power management systems
Motor control (small motors)
Overcurrent detection circuits
Embedded electronics systems<
The WCS2702 is a precision low-current Hall-effect sensor that:
Provides isolated, linear analog current measurement
Works with both AC and DC signals
Is optimized for low-current, high-accuracy applications
Best suited when you need:
Electrical isolation + analog simplicity
Accurate measurement below 2A range</