magnetic system design and current measurement solutions


4[mm] Clamp-On Non-Intrusive Current Sensor Module

The CO-04-SF-A is an analog open loop current sensor module designed for non-intrusive and isolated mea- surement of electric currents. Thanks to the clamp-on design, the contactless current sensor can be safely installed without the need to interrupt or cut the cable.


The module consists of a PCB including Melexis IMC- Hall® planar current sensor, CO-04-SF Clamp-On shield and the necessary components to straightfor- wardly install and operate.

Supplied with a DC voltage of 5V, the module provides a linear analog output voltage between 500 mV and 4500 mV as a function of the primary input current. Thanks to its properties, CO-04-SF-A offers an ex- cellent linearity error, below 0.5 %FS. Thanks to the integrated Melexis IMC-Hall® current sensor, the sensor module provides excellent offset as low as ±5 mV and sensitivity drift of 1 % over full temperature range.

Applications include DC and AC current sensing up to 30 kHz, motor control, battery monitoring, charge control, white goods, and many more.



• Low hysteresis
• High Permeability
• Hall-Sensor Measurement
• High Linearity up to 150 A
• Temperature Range: 10 to 85 °C • Low Offset drift <5 mV
• Low Sensitivity drift <1 %
• DC and AC (30 kHz)



• Snap-Fit installation
• Non intrusive sensing
• Small Size, Lightweight
• Excellent output linearity



• IoT
• Industrial
• E-metering

• Photovoltaic


Module Overview

Module Overview

Ordering Information

CO-04-SF-A(Product) XXX(Option Code)

Option Codes ⇒ Current Range. Current Range defines the peak current value.

Product Option Code Typical Sensitivity Current Range
CO-04-SF-A 100 200.00 mV/A ±10 A
CO-04-SF-A 250 80.00 mV/A ±25 A
CO-04-SF-A 500 40.00 mV/A ±50 A
CO-04-SF-A 101 20.00 mV/A ±100 A
CO-04-SF-A 151 13.33 mV/A ±150 A

Contact maglab AG / PML India for a different sensitivity requirement


Absolute Maximum Ratings

Non operating conditions

Parameter Symbol Value Unit
Positive Supply Voltage VDD +10 V
Reverse Supply Voltage VDDREV -0.3 V
Positive Output Voltage VOUT +10 V
Reverse Output Voltage VOUTREV -0.3 V
Positive Output Current IOUT +50 mA
Reverse Output Current IOUTREV -50 mA
Ambient Temperature TA 0 to +120 °C
ESD Human Body Model ESDHBM +50 kV

IMPORTANT: exceeding the absolute maximum ratings may cause permanent damage to the sensor module. Exposure to absolute maximum-rated conditions for extended periods of time may affect sensor module reliability.




General Electrical Specification

Operating conditions TA = 10 to +85 ◦C, VDD = 5V±10%, unless otherwise specified.

Table 2: Absolute Maximum Ratings

Parameter Symbol Condition Min.  Typ.  Max. Unit
Nominal Supply
VDD 4.5         5         5.5 V
Supply Current IDD No output load 9        12.5        15 mA
Output Resistive
RL For high linearity 10        25      200
Linear Output
VOUTLIN RL ≥ 10kΩ 10                     90 %VDD
Broken GND  Ouptut
RL ≥ 10kΩ, VDD = 5V 96                  100 %VDD
Broken VDD  Ouptut
RL ≥ 10kΩ, VDD = 5V 0                          4 %VDD
Output Quiescent
VOQ RL ≥ 10kΩ, VDD = 5V 50 %VDD


Analog Output Specification

Operating conditions TA = 10 to +85 ◦C, VDD = 5V±10%, unless otherwise specified.

Table 3: Accuracy specification

Parameter Symbol Condition Min. Typ. Max. Unit
Thermal Offset Drift T VOQ TA= 0 to 85 °C ±5 mV
Thermal Sens. Drift T S TA= 0 to 85 °C ±1 %S
VOQ Ratiometry RVOQ VDD = 5V ±5% ±0.4 %VOQ
Sensitivity Ratiometry RS VDD = 5V ±5% ±0.4 %VOQ


Timing Specification

Operating conditions TA = 10 to +85 ◦C, VDD = 5V±10%, unless otherwise specified.

Table 4: Timing specification

Parameter Symbol Condition Min. Typ. Max. Unit
Refresh Rate TRR 1 μs
Step Response Time TR 2 μs
Bandwidth BW 30 kHz




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