Clamp On

Non-intrusive "Clamp-On" current sensor

“Clamp-on” or “Cable clamp” Current Sensors are sensors that are used for measuring AC or DC currents. They are particularly useful for measuring currents flowing in a cable wire in a non-intrusive way.

Product Description

The “clamp-on” current sensors are particularly useful for easy and safe installation. They are installed straightforwardly onto a wire going into the electrical load without the need to do any high voltage electrical work. The current sensor consists of a Melexis Hall Sensor (MLX91208) and a patented ferromagnetic structure packaged in a robust plastic housing.

This non-invasive current sensor (also known as a “split core” or “cable-clamp” ) can be clamped around the supply line of any electrical load to tell you how much current is passing through it. It monitors the magnetic field around a current-carrying conductor and outputs a voltage proportional to the current.

The clamp-on current sensors measure loads from +/-5 Amps to +/-230 Amps which makes it great for building your own energy monitor to keep your power usage down, or even building an over-current protection device for an AC load.

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Product description CO-4-1.2-30-L
Product description CO-4-1.2-75-H
Product description CO-10-1.2-150-V60
Product description CO-10-1.2-230-V40

Magnetic Characteristics

  • AC and DC current measuring
  • Motor control, over-current protection or DC Battery current monitoring
  • Solar power junction boxes, smart junction boxes, lighting equipment, air compressor, water pumps
  • E-mobility, charging stations, power management, state-of-charge

Module Overview

Module Diameter (mm) Current range (A)
CO-4-1.2-30-L 4 ±5…±30
CO-4-1.2-75-H 4 ±30…±75
CO-10-1.2-150-V60 10 ±75…±150
CO-10-1.2-230-V40 10 ±150…±230


Parameter Typical value Unit
Primary input current ±5…±230(1) A
Output voltage swing ±2000 mV
Output voltage range 500…4500 mV
Operation frequency DC…100 kHz
Operation temperature -40…85 °C
Supply voltage 5 V
Supply current 10 mA
(1) Please refer to the Module Overview Table