Description
The SCT-013 series is a split-core AC current transformer designed for non-invasive current measurement in energy monitoring, load diagnostics, and equipment protection. The clamp-on design allows installation around an existing insulated conductor without cutting or disconnecting the wire, making it suitable for retrofitting into live electrical installations. The 100A voltage-output variant includes an internal sampling resistor, delivering a direct 0–1V AC output proportional to the primary current—no external burden resistor is required for basic operation .
This model is rated for 100A AC (RMS) input and is commonly used for monitoring whole-building consumption, large AC motors, and industrial equipment. The 1-meter cable terminates in a standard 3.5mm audio plug . The sensor is suitable for individual makers building Arduino-based energy monitors and for business purchasers seeking a cost-effective, non-invasive current sensing solution for commercial and light industrial applications.
Accuracy note: Several distributor listings specify ±1% accuracy with linearity ≤0.2% for the SCT-013 series . However, the manufacturer’s general datasheet specifies non-linearity of ±3% (10%–120% of rated input) . The ±1% figure may apply to specific calibrated conditions or branded units. For critical applications, calibrate against a known reference load.
Features
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Non-Invasive Split-Core Design: Clamps around an existing conductor without disconnecting the circuit, enabling safe retrofitting into live installations .
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Voltage Output with Internal Sampling Resistor: Provides a direct 0–1V AC output ready for ADC connection; no external burden resistor required .
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100A Measurement Range: Suitable for whole-building monitoring, large motors, and industrial equipment.
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13mm × 13mm Opening: Accommodates typical domestic and commercial wiring .
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1-Meter Cable with 3.5mm Plug: Standardized connector simplifies connection to energy monitoring boards .
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Ferrite Core Construction: Provides stable magnetic coupling and consistent ratio across the measurement range .
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Safety Lock Buckle: Secure closure helps maintain core alignment and measurement accuracy .
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UL94-V0 Flame Retardant Housing: Meets recognized fire safety standards .
Technical Specifications
| Parameter | Specification |
|---|---|
| Model (as titled) | SCT-013-100 (verify actual output variant) |
| Primary Current Range | 0–100A AC (RMS) |
| Output Signal (voltage variant) | 0–1V AC (internal sampling resistor) |
| Output Signal (standard -100) | 0–50mA (external burden required) |
| Turns Ratio | 1:2000 (for 100A/50mA current output) |
| Opening Size | 13mm × 13mm |
| Cable Length | 1 meter |
| Connector | 3.5mm audio plug |
| Accuracy (distributor spec) | ±1%, linearity ≤0.2% |
| Non-linearity (manufacturer spec) | ±3% (10%–120% of rated input) |
| Operating Temperature | -25°C to +70°C |
| Dielectric Strength | 6000V AC/1min (housing to output) |
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