100A YHDC Non-invasive AC Current Sensor
100A YHDC Non-Invasive AC Current Sensor
Clamp-Type Safe Measurement Energy Monitoring
What is this sensor?
The 100A YHDC Non-Invasive AC Current Sensor (commonly SCT-013-000) is a current transformer (CT sensor) used to measure alternating current (AC) without direct electrical contact.
It is called non-invasive because:
You don't need to cut wires
Just clip it around a conductor
Widely used in energy monitoring and IoT systems
Working Principle
Works on current transformer principle
The wire acts as primary winding
Sensor coil acts as secondary winding
Process:
AC current flows throu
Sensor coil detects this field
Produces proportional output current/voltage
No direct electrical connection safe measurement
Output Types
Two common versions:
1. Current Output (e.g., SCT-013-000)
Output: small AC current (e.g., 50mA)
Requires burden resistor to convert to voltage
2. Voltage Output
Built-in resistor
Direct voltage output (easy to use)
Physical Features
Split-core clamp design
3.5mm audio jack output
Cable length ~1 meter
Clip-on installation
Can be attached without disconnecting wires
Technical Specifications
Rated Current: 0 100A AC
Max Current: up to 120A<(typical)
Turns Ratio: ~1:2000
Accuracy: 1%
Frequency Range: 50Hz 1kHz
Operating Temp: -25C to +70C
Max Voltage: up to 660V
Core Material: Ferrite
Opening Size: ~13mm
Output Behavior
Output is AC waveform proportional to current
Must be:
Converted to voltage
Sampled using ADC
Not a direct digital sensor
Key Features
Non-invasive (safe and easy installation)
High accuracy (~1%)
Wide current measurement range
Compact and durable
Supports both current & voltage outputs
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Applications
Home energy monitoring systems
Smart meters
IoT power monitoring
AC motor monitoring
Load detection systems
Industrial current measurement
Advantages
No direct electrical contact
Safe for high-voltage systems
Easy installation (clip-on)
Long lifespan
Ideal for DIY and IoT projects
Limitations
Works only with AC (not DC)
Requires signal conditioning circuit
Accuracy reduces at very low current
Needs calibration for precise readings
Important Notes
Clamp only one wire (live OR neutral, not both)
For Arduino:
Use burden r/li>
Output is small requires amplification/filtering
Choose correct current rating for better accuracy
Summary
The YHDC 100A Non-Invasive AC Current Sensor is a:
Clamp-type current transformer Safe and non-contact measurement device Ideal for energy monitoring and IoT
Best suited for:
Smart energy meters
Home automation
Indu