SCT103 Non-invasive AC Current Clamp Sensor 30A for Monitoring
SCT103 Non-invasive AC Current Sensor Clamp 30A
The SCT103 is a non-invasive clamp current sensor designed to measure AC current up to 30A without breaking the circuit. Simply clip it around a live wire to get an isolated voltage output proportional to the current. Ideal for energy monitoring, power logging, and overcurrent protection in embedded projects.
Key Specifications
| Specification | Value |
|---|---|
| Current Range | 0 to 30A AC |
| Output Signal | 0 to 1V (at 30A) |
| Frequency Range | 50Hz to 1kHz |
| Clamp Opening | 13mm diameter |
| Dielectric Strength | 6000V AC for 1 minute |
| Cable Length | 1.5 meters with 3.5mm jack |
What You Can Build With This
- Home energy monitor using Arduino or ESP32
- Solar inverter output tracking
- Server room PDU current logger
- Overcurrent alarm system for appliances
Compatibility
Works with any microcontroller with an analog-to-digital converter (ADC), such as Arduino Uno, Nano, ESP8266, ESP32, Raspberry Pi (with ADC), STM32, and PIC. The output is 0–1V AC, offset to half the reference voltage via a simple voltage divider for most ADCs. No external burden resistor needed for standard operation.
Wiring Notes
Connect the sensor's output pin to an analog input. Add a 10kΩ resistor from the signal to ground and a 0.1µF capacitor in parallel for noise reduction. For 3.3V boards, use a voltage divider to scale the output accordingly. Always ensure the measured wire is disconnected from power when clamping for safety.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, the SCT103 works with any Arduino that has an analog pin. Connect VCC to 5V, GND to GND, and output to A0. Use the analogRead() function to measure voltage and convert to current using a calibration factor.
How do I calibrate the sensor?
Calibration involves applying a known load and adjusting the conversion factor in software. Multiply the ADC reading by the reference voltage, then by a scaling constant (approximately 30 for 30A range) to get amperes. Fine-tune with a multimeter for accuracy.
Can it measure DC current?
No, the SCT103 is a current transformer and only works with alternating current (AC). For DC measurements, consider a hall-effect sensor like ACS712.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items