Description
The SCT-013-100 is a split-core AC current transformer designed for non-invasive current measurement in energy monitoring, load diagnostics, and equipment protection. Unlike the voltage-output variants in the SCT-013 family, this model provides a current output of 0–50mA proportional to the primary current, and requires an external burden resistor to convert the signal into a measurable voltage for microcontroller ADCs . 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. This model is rated for 100A AC (RMS) input and is commonly used for whole-building energy monitoring, large AC motors, and industrial equipment .
Important specification note: Manufacturer documentation specifies non-linearity of ±3% (within 10%–120% of rated input current) for the SCT-013 series . The “±1% accuracy” figure in the product title is widely listed by distributors but does not match the official datasheet. For critical applications, calibration against a known reference load is recommended.
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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Current Output (0–50mA): Provides a proportional current signal that requires an external burden resistor for ADC interfacing .
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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 | SCT-013-100 |
| Primary Current Range | 0–100A AC (RMS) |
| Output Signal | 0–50mA AC (current output) |
| Turns Ratio | 1:2000 |
| Burden Resistor | External required (33Ω for 5V Arduino; 18Ω for 3.3V) |
| Opening Size | 13mm × 13mm |
| Cable Length | 1 meter |
| Connector | 3.5mm audio plug |
| Non-linearity | ±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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