SCT-013-030 Non-Invasive AC Current Clamp Sensor, 30A, Split-Core

The SCT-013-030 measures AC current using a split-core clamp design, meaning it opens and closes around an existing wire rather than needing that wire cut and spliced into the sensor - a genuinely significant safety and convenience advantage for retrofitting current monitoring onto a live circuit without an electrician needing to break the connection. The ferrite core inside clamps around the conductor and senses current through the magnetic field it generates, outputting a proportional voltage signal.

Rated for up to 30A input current, this sensor covers typical single-circuit household and small-equipment monitoring applications, outputting through a 3.5mm plug for a correspondingly simple wired connection to a monitoring device or microcontroller's analog input. Non-linearity is rated within 3 percent across the 10-120 percent rated-current range, giving reasonably accurate readings across most of the sensor's practical operating window rather than just at one specific current level.

Construction uses an ABS external housing over the ferrite core, rated for dielectric strength of 6000VAC for one minute - a meaningful safety margin given the sensor clamps around a live conductor. Flame rating meets UL94-V0, and the included 1 meter cable gives reasonable placement flexibility between the monitored circuit and wherever the reading is actually processed or displayed.

Builders working on a home energy-monitoring project, an appliance power-usage logger, or any application needing to measure AC current on an existing circuit without rewiring or splicing into it will find the SCT-013-030 a well-proven, safe, and genuinely convenient non-invasive current sensor for that specific 30A-range monitoring task.